iw) 
On 
2. MACROCLEMMYS. 
1. Macroclemmys temminckii. 
Chelonura temminckii ( Z'roost), Holbr. 1. c. p. 147, pl. xxiv. 
Emysaurus temminckii, 4. Dum. Cat. Méth. Rept. p. 16 (1851). 
Macroclemys temminckii, Gray, Cat. Sh, Rept. i. p. 49, pls. xxxviii. 
fig. 2, xxxix., & xl. fig. 1. 
Macrochelys temminckii, Gray, Proc. Zool. Soc. 1855, p. 200, and 
Suppl. Cat, Sh. Rept. i. p. 64. 
Gypochelys lacertina, Agassiz, /. c. p. 414, pl. v. figs. 23-27. 
Macroclemmys temminckii, Strauch, J. c. p. 134. 
Macrochelys lacertina, Cope, Proc. Ac. Philad. 1872, p. 23. 
Carapace strongly tricarinate. Vertebral shields much broader 
than long, at least three fourths the width of the costals. Width 
Fig. 6. 
Shell of Macroclemmys temminckit. 
of the bridge one seventh to one ninth of the length of the plastron ; 
the hypoplastra take a rather greater share in the formation of the 
bridge than the hyoplastra. Plastral shields subject to great varia- 
tion; the arrangement in the three specimens in the Museum is 
shown by the following figures (fig. 7). Fig. 6 affords good support 
to the view that the shield covering the bridge is the displaced 
abdominal; it also offers the striking example of an intergular, 
placed as in Chelodina; fig. ¢ shows a pair of intergulars, as in the 
fossil genus Baéna. 
