TESTUDINID. 395 
No. 1354 of the Cope collection has a length of 219 mm. and a width of 160 mm. Its 
anterior border is concave, the neurals are of moderate width, the pygal is bifurcate, the 
peripherals over the hind limbs somewhat flaring, and there is a conspicuous and sharp carina 
along each side. The vertebral scutes are like those of No. 1359. There is a considerable 
depression on the area of the second, third, and fourth vertebral scutes. No. 1355 is an injured 
shell, but shows an anterior slightly concave outline. A peculiarity is presented in the anterior 
neurals. The first is broad in front and comes into contact with the second costal plates. 
The second is hexagonal, with the shorter sides behind. The third seems to have had four 
convex sides. The anterior vertebral scute has been 64 mm. wide; the second, 52 mm. wide. 
No. 1351 is a small turtle, 145 mm. long, which has the first and fifth vertebral scutes 
about as wide as the second and third. 
Fics. 500 AND 501.—Stylemys conspecta. Carapace and plastron of type. 
X4. No. 1358 A. M.N. H. 
soo. Carapace. sor. Plastron. 
Notwithstanding the differences observed among the specimens just described, the writer 
feels compelled to refer them all to a single species. 
Stylemys cons pecta appears to difter from S. nebrascensis in the following respects: The 
shell is narrower in proportion to its length. The width forms about 75 per cent. of the length, 
whereas in S. nebrascensis, the width 1s usually, if not always, about 85 per cent. of the length. 
In S. nebrascensis the second and third neurals are almost always hexagonal. Only in the 
specimen described by Leidy as S. culbertsoni has the writer observed an octagonal second 
neural. In only one specimen of S. conspecta, No. 1354, above described, has the second been 
observed to be not octagonal, and this specimen has other irregularities. The costal plates of 
S. conspecta are more highly differentiated than those of S. nebrascensis, as has been described. 
The anterior peripherals of S. conspecta do not extend so far backward from the free border 
as those of S. nebrascensis. The position of the sulci between the anterior marginal and the 
