Proceedings of the American Academy of Arts and Sciences, 20권American Academy of Arts and Sciences., 1885 |
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... margin . Abdomen orbicular or oval , at base as broad or nearly as broad as the cephalo- thorax , with a lateral ridge on each side converging toward the anus , the surface moderately smooth ; segments seven to nine in number , the ...
... margin . Abdomen orbicular or oval , at base as broad or nearly as broad as the cephalo- thorax , with a lateral ridge on each side converging toward the anus , the surface moderately smooth ; segments seven to nine in number , the ...
17 페이지
... margin . Sides of the body constricted so as to show a distinct though generally slight separation of cephalothorax and abdomen . Abdomen orbicular , com- posed of seven segments of similar length throughout . Anthracomartus Völkelianus ...
... margin . Sides of the body constricted so as to show a distinct though generally slight separation of cephalothorax and abdomen . Abdomen orbicular , com- posed of seven segments of similar length throughout . Anthracomartus Völkelianus ...
18 페이지
... margin , into a median and lateral fields , of which the median is about as large as the combined lateral fields . Kreischeria Wiedei Geinitz , Zeitschr . deutsch . geol . Gesellsch . , 1882 , pp . 238-242 , pl . 14 , figs 1 , 2 ...
... margin , into a median and lateral fields , of which the median is about as large as the combined lateral fields . Kreischeria Wiedei Geinitz , Zeitschr . deutsch . geol . Gesellsch . , 1882 , pp . 238-242 , pl . 14 , figs 1 , 2 ...
19 페이지
... margin . Dorsal surface of abdomen with two lateral rows of large rounded tubercles and a median row of large stellate tubercles , besides being sometimes divided by longitudinal sutures into median and lateral fields . Eophrynus ...
... margin . Dorsal surface of abdomen with two lateral rows of large rounded tubercles and a median row of large stellate tubercles , besides being sometimes divided by longitudinal sutures into median and lateral fields . Eophrynus ...
34 페이지
cleavage - groove , and a more or less distinct constriction between the margin of the disc and the yolk . In Nassa the two blastomeres succeed in attaining a completely spherical form and the equatorial constriction is carried to the ...
cleavage - groove , and a more or less distinct constriction between the margin of the disc and the yolk . In Nassa the two blastomeres succeed in attaining a completely spherical form and the equatorial constriction is carried to the ...
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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