Proceedings of the American Academy of Arts and Sciences, 20권American Academy of Arts and Sciences., 1885 |
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16 페이지
... surface moderately smooth ; segments seven to nine in number , the basal ones visible below , though often extremely shortened in the middle ; no abdominal appendages . GERAPHRYNUS nov . gen . Cephalothorax fusiform , angulated in front ...
... surface moderately smooth ; segments seven to nine in number , the basal ones visible below , though often extremely shortened in the middle ; no abdominal appendages . GERAPHRYNUS nov . gen . Cephalothorax fusiform , angulated in front ...
17 페이지
... surface are forced still more closely together by the large post - thoracic plate . Architarbus rotundatus Scudder , Worth . Geol . Ill . , iii . 568 , fig . 4 , 1868. Mazon Creek , Ill . Architarbus subovalis Woodward , Geol . Mag ...
... surface are forced still more closely together by the large post - thoracic plate . Architarbus rotundatus Scudder , Worth . Geol . Ill . , iii . 568 , fig . 4 , 1868. Mazon Creek , Ill . Architarbus subovalis Woodward , Geol . Mag ...
18 페이지
... surface of body closely covered with very irregularly polygonal sunken cells , giving the whole body a pustulate appearance . Length 15 mm . ; greatest breadth 7.5 mm . Mazon Creek , Ill . This species was received from Mr. R. D. Lacoe ...
... surface of body closely covered with very irregularly polygonal sunken cells , giving the whole body a pustulate appearance . Length 15 mm . ; greatest breadth 7.5 mm . Mazon Creek , Ill . This species was received from Mr. R. D. Lacoe ...
19 페이지
... surface tumid , completely broken into great tuberculate bosses , arranged in a lateral row down either side and a median row dividing in two at the posterior margin . Dorsal surface of abdomen with two lateral rows of large rounded ...
... surface tumid , completely broken into great tuberculate bosses , arranged in a lateral row down either side and a median row dividing in two at the posterior margin . Dorsal surface of abdomen with two lateral rows of large rounded ...
20 페이지
... surface of the cephalothorax , we find that the coxæ of the second pair of legs do not touch along the middle line of the body , as in all living forms , ( where they cut off anteriorly the so - called sternum , ) but are separated by a ...
... surface of the cephalothorax , we find that the coxæ of the second pair of legs do not touch along the middle line of the body , as in all living forms , ( where they cut off anteriorly the so - called sternum , ) but are separated by a ...
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Abdomen abdominal appendages Acad acetic acetic acid acid acute Antennæ anthracene appears areola Astacus Barrande base Bentham blastodisc blastomeres border Boston bracts branches broad California calyx Cambarus Cambridge carapace cells Cephalothorax cervical groove chela ciliate cleavage cleavage-plane collected corolla difference of potential Dikelocephalus dorsal Emmons entoderm Eritrichium faune feet flowers foliis fossils fruit genera genus glabrous Graptolites Gray gynobasi Hagen inches long lateral leaflets leaves length less limestone lines long lobes longis Magn male margin maxillipeds median Mountains nearly nuclei Nuculæ nutlets oblong observations Olenus ovum pair of legs papillæ Paradoxides pedicels periblast petioles plate Point Lévis posterior Potsdam precipitate Primordial fauna Proc pubescent punctate ring River rostrum sæpius sandstone schists second fauna segment sepals short side Silurian slates slender somites species specimens spermogonia spines stars superficial tension surface Taconic system telson third tion Trilobites tube upper ventral