. Synopsis of the extinct Batrachia, Reptilia and Aves of North America . positionof the parapophysis, it is formed of two partly confluent subacuteelevations. The dorsal vertebras, from their nimeralization, condition, andtime and place of discovery, probably belong to the same animal as thecervicals above described. The breadth of the cup of the fifth is alittle greater than the length to the posterior shoulder, it differs fromLeidys figure of the sixth of tenebrosus, T. III., f. 13, in its largehypapophysis, which stands on nearly the entire centrum, and is veryprominent, and concave in fro
. Synopsis of the extinct Batrachia, Reptilia and Aves of North America . positionof the parapophysis, it is formed of two partly confluent subacuteelevations. The dorsal vertebras, from their nimeralization, condition, andtime and place of discovery, probably belong to the same animal as thecervicals above described. The breadth of the cup of the fifth is alittle greater than the length to the posterior shoulder, it differs fromLeidys figure of the sixth of tenebrosus, T. III., f. 13, in its largehypapophysis, which stands on nearly the entire centrum, and is veryprominent, and concave in front; the sides of the centrum are concave from cup to shoulder. In the third dorsal but a narrow space exists behind and before the hypapophysis. and thevertical diameter of the cup is less than the transverse, and exhibits the same cordate outline. As usual some (theanterior) lumbars are deeper than wide, and in others the bodies are subquadrate in section, and the transversediameter of the cup greater. Measurements are as follows : AMERI. PHILOSO. SOC.—VOL. XIV. 19. 74 THE EXTINCT BATRACHIA, KEPTILIA Third cervical : length to shoulder, opposite posterior angle parapophysis, width between latter points, least width behind parapophyses, vertical diameter cup, transverse diameter cup, above, below, Fourth cervical : length to shoulder, end parapophysis, Third dorsal : length to shoulder, opposite posterior angle parapophysis, of basis of hypapophysis, width between ends of parapophyses, of neural arch just behind diapophyses, of anterior cup, of neural arch, vertical diameter neural arch, cup, Fifth dorsal : length to shoulder, basis hypapophysis, width of centrum at middle, cup, vertical diameter at middle,Lumbar : length to> shoulder, vertical diameter cup, transverse, Portions of the frontal and parietal bones of a gavial are figured by Leidy (III., fig. 8). They are shown underthe head of H. brevispinis not to be referable to the cranium of that species, or of H. tenebr
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Keywords: ., bo, bookcentury1800, bookdecade1860, bookidsynopsisofextinc00cope
