Sections and Faunal Lists in the Lake Champlain Region... 511 Stations on Valcour Island.... Stations at Valcour, New York........ Station at Plattsburgh, New York... Sections at Chazy, New York. Section D, Chazy, New York........ Section E, Chazy, New York.. Section F, Chazy, New York...... Station at Chazy, New York................ Stations at Cooperville, New York... Discussion of the Faunas of the Chazy and Valcour Island Sections....... 525 525 527 534 537 538 540 543 545 545 547 Comparison of the Crown Point, Valcour Island, and Chazy Sections......... 552 Comparison of the present Section at Crown Point with that made by Brainerd and Seely....... Region north of the Canadian line.............. 553 554 Ottawa Valley Region. Aylmer Formation......... 557 Comparison of the Faunas of the Aylmer Sandstone and Aylmer Limestone. 560 Comparison of the Fauna of the Ottawa Region with that of the Champlain Relation of Divisions 1, 2, and 3 to Cushing's Substages.. Brachiopoda Gastropoda Pelecypoda Bibliography...... 569 571 572 573 573 574 575 577 578 XXI. A NEW AMERICAN CYBELE. BY J. E. NARRAWAY AND PERCY E. RAYMOND. American specimens of trilobites of the genus Cybele are so extremely rare that a fairly complete individual discovered by the senior writer in the Black River formation near Ottawa, Canada, adds considerably to our knowledge of American forms. Clarke has described a nearly complete specimen of a species of this genus from the Mohawkian of Minnesota (Paleontology of Minnesota, Volume 3, part 2, page 762, 1897); Billings described the pygidium of another species from the Quebec group of Newfoundland (Paleozoic Fossils of Canada, Volume 1, page 292, 1865); Ruedemann described a partial pygidium from the Lower Trenton at Rysedorph Hill, near Albany, New York (Bulletin of the New York State Museum, Number 49, page 66, 1902); and Raymond has described a species from the Chazy formation at Valcour, New York. This last species was also founded on specimens of the pygidium. The specimen now to be described is more perfectly preserved than any so far found, except the one described by Clarke, from Minnesota, and fortunately preserves the glabella, a portion not previously recognized in American forms of this genus. This specimen, which is a little less than five-eighths of an inch in length, shows the glabella and the outline of one side of the cephalon, a large part of the free and fixed cheek having been chipped off. The axial lobe is complete, but about half of the left pleuron is gone, the fracture being at a low angle with the axis, and not far from the axial lobe. The first six segments of the thorax have also been somewhat damaged on the right side. end. The pygidium is complete except for a small loss at the distal All the important points, except the position of the eye and the 1 Encrinurus mirus Billings, which was the first American species of Cybele described (see locality cited above) was founded on detached glabellæ and pygidia. The pygidium is undoubtedly that of a Cybele, but there is some doubt about the cranidium. If it really is that of a Cybele, it is distinctly of the European type with three deeply incised glabellar furrows. Dr. Clarke has suggested that this cranidium may belong to a species of Amphion ( Pliomera). form of the hypostoma, can be made out. It is to be hoped that the attention of collectors may be again directed to these rare trilobites by the recent finds and that more good specimens may be brought to light. FIG. I. 7 diameters. Dorsal view of the test of a specimen of Cybele ella sp. nov. enlarged Order PROPARIA Beecher. Family ENCRINURIDE Linnarsson. Cybele ella sp. nov. The single specimen now known is 14 millimeters long, and the greatest width, at the genal angles of the cephalon is 12 millimeters. Test depressed, wide at the genal angles, and tapering rather rapidly to a very small pygidium. Axial lobe narrow, convex, the pleura flattened and curving down abruptly at the sides. Cephalon short, very wide. Glabella narrow, convex; cheeks depressed convex, lower than the glabella. Length of cephalon, 4 millimeters; width, 12 millimeters. Glabella narrow behind, expanding toward the front. Glabellar furrows represented by three pairs of pits, the second and third pit on either side united into a long depression parallel to the axis, thus forming side lobes to the glabella. Behind the third pair of pits, representing the third glabellar furrows, are a pair of rather deep pits in the line of the neck furrow. Leading diagonally forward and outward from these pits are narrow depressions which bound the posterior ends of the side lobes of the glabella. The top of the glabella is marked by five pairs of pustules, and on the frontal lobe there are several more, all large and rounded. The larger pustules on the top of the glabella are connected in pairs by slight transverse ridges. On the median line of the glabella, just in front of the first pair of furrows, is a rather large circular pit. Opposite the widest part of the frontal lobe of the glabella there are, on the fixed cheeks, two deep pits not well shown in the figure. The specimen is broken, so that a large part of both free and fixed cheeks are removed. A part of one free cheek remains, and shows a coarsely reticulated surface. The suture starts very close to the anterior end of the glabella and runs back near the outer margin of the glabella until opposite the first pair of glabellar pits. From that point its course cannot be followed. It cuts the frontal border again a short distance in front of the genal angle. The position of the eye cannot be observed, but it was probably distant from the glabella, as in other species of this genus. Such portions of the fixed cheeks as are preserved are smooth, and sharply differentiated from the free cheeks by the absence of reticulations. The suture is not very sharply impressed. The fixed cheeks are depressed, and separated from the glabellar lobes by a narrow furrow except opposite the first glabellar pits, where there is a transverse ridge extending outwardly upon the cheeks. Around the front of the free cheeks is a narrow, rounded border, and at the genal angle, a large, divergent spine, of which in this specimen only the base is preserved. Thorax with twelve segments, the sixth one from the front a little wider and more prominent than the others. It does not appear to have borne spines as in Cybele winchelli, but the condition of the specimen is not such as to make this point clear. The axial lobe is |