Proceedings of the American Academy of Arts and Sciences, 20권American Academy of Arts and Sciences., 1885 |
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9 페이지
... equal petals , so far as they are North American , may be discriminated by means of the following key . The series ends with a peculiar California species , recently discovered , which may be appended to this group . 1. No creeping ...
... equal petals , so far as they are North American , may be discriminated by means of the following key . The series ends with a peculiar California species , recently discovered , which may be appended to this group . 1. No creeping ...
14 페이지
... equal above and below . Integu- ment smooth . ARCHITARBUS Scudder . Cephalothorax and abdomen not separated by a lateral constriction . A. rotundatus Scudder ( Illinois ) , A. subovalis Woodward ( England ) , A. silesiacus Roemer ...
... equal above and below . Integu- ment smooth . ARCHITARBUS Scudder . Cephalothorax and abdomen not separated by a lateral constriction . A. rotundatus Scudder ( Illinois ) , A. subovalis Woodward ( England ) , A. silesiacus Roemer ...
16 페이지
... equal breadth with the cephalothorax , with very indistinct or no longitudinal sculpturing , and composed of only four segments , of which the basal is very short . No abdominal appendages . POLIOCHERA nov . gen . Cephalothorax scarcely ...
... equal breadth with the cephalothorax , with very indistinct or no longitudinal sculpturing , and composed of only four segments , of which the basal is very short . No abdominal appendages . POLIOCHERA nov . gen . Cephalothorax scarcely ...
17 페이지
... equal length and width , broadest behind the middle , and furnished with a marginal flange nearly as broad as the ' lateral fields . Whole body delicately and uniformly punctate . Length 17.5 mm .; greatest width 11.25 mm . Fayetteville ...
... equal length and width , broadest behind the middle , and furnished with a marginal flange nearly as broad as the ' lateral fields . Whole body delicately and uniformly punctate . Length 17.5 mm .; greatest width 11.25 mm . Fayetteville ...
21 페이지
... equal length and breadth . Both intermediate and dorsal lamellæ of the combs very numerous , rounded and small , subequal , and not larger than the fulcra , arranged in many rows , the teeth numerous and forming a single row toward the ...
... equal length and breadth . Both intermediate and dorsal lamellæ of the combs very numerous , rounded and small , subequal , and not larger than the fulcra , arranged in many rows , the teeth numerous and forming a single row toward 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