216 FOSSIL TURTLES OF NORTH AMERICA. 
longiceps the type of Puppigerus, and the latter 1s not congeneric with Chelonia grandeva, this 
species can not be placed under Puppigerus. 
A study of the known materials of Chelonia grandeva makes it apparent that the first 
costal bone was articulated with the nuchal and the first peripheral of each side and that some 
of the costals were articulated proximally with 3 neurals each. In these respects the species 
differs from any belonging to either Chelonia, Eretmochelys, or Caretta, 
As regards the relations of the costals to the neurals, we find similar conditions in a spec- 
imen of Colpochelys kemp: in the American Museum of Natural History. In this there are 
apparently 13 neurals, and the costals of the third, fourth, fifth and sixth pairs articulate each 
with 3 of these neurals. Nevertheless, nearly all the neurals are hexagonal, none octagonal, 
as in Testudo, where some costals articulate with 3 neurals. 
On a comparison of the widths of the costals with the lengths of the neurals we find a 
confirmation of the conclusion that there were, as in Colpochelys, more than 8 neurals. 
But while agreeing with Colpochelys in these respects Procol pochelys differs from it in 
another. In Colpochelys the end of the rib of the first costal bone enters a pit in the fourth 
or fifth peripheral, while in Procol pochelys grandeva, as in most Cheloniidz, the end of the 
first costal rib enters a pit in the third peripheral. 
Procol pochelys is therefore distinguisht from all the hitherto recognized genera of Che- 
lonide. 
On pages 8, g, and 10 Colpochelys kemp: has been referred to the genus Lepidochelys. 
Fics. 273 AND 274.—Procol pochelys grandeva. Neurals. X. 
273. Two neural bones. Type. 274. Neural. No. 1027 A. M.N.H. 
Procolpochelys grandeva (Leidy). 
Figs. 273-280. 
Chelonia grandava, Leipy, Proc. Acad. Nat. Sci. Phila., v, 1851, p. 329; Ibid., vit, 1856, p. 303.— 
Corr, Cook’s Geol. New Jersey, 1868 (1869), p. 738; Ext. Batrach., Reptilia, and Aves N. A., 
1870, p. 153, figs. 40, 41.—Maack, Paleontographica, xvi, 1869, p. 283. 
Puppigerus grandevus, Corr, Ext. Batrach., etc., 1870, p. 235; Proc. Amer. Philos. Soc., x1v, 1875, p. 
363.—Hay, Bibliog. and Cat. Foss. Vert. N. A., 1902, p. 443. 
Dr. Leidy’s Chelonia grandeva is an insufhciently known species. The type belongs to 
the Philadelphia Academy. It consists of three neural bones which had been found in what 
is regarded as Miocene marl, in Salem County, New Jersey. One of these neurals appeared 
to Leidy to be the first. A portion of the anterior end had been broken off, yet the part 
that remained was 67 mm. long and 48 mm. wide. The other two neurals were hexagonal, 
as wide as long or wider, and each had a posterior process, showing that some of the neurals 
were sharply notcht in front. One of these (fig. 273, @) was 54 mm. long, 67 mm. wide, and 
15.5 mm. thick; the other (fg. 273,4) was 58 mm. long, including the process, and 58 mm. wide. 
Cope, in 1870, as cited, further described the species. He had some fragments of costals; 
a fragment of probably the nuchal; the scapula, which he figured; and what he described as 
the femur, but which was evidently the humerus, as indeed he says it was in his explanation 
