3. P0D0CNEM18. 203 



a. J, stffd. Santa Cruz. Mr. E. IJartlett 10.]. 



b, c. Ad., .-skulls. U})pcT Auiazun. Mr. E. J>iirtlelt [C.J. 

 d, e. Ad., skulls. E^a. 1 1. W. JJates, Esq. tC 

 /. $,slff(l. Lakes of Upper Amazuu. 11. W. Jktes, ICsq. "C' 



</. Ad., shell. Lakes of Upper Amazon. II. W. 13ate.s, E«q. [C. 



h. Yg., stffd. Lower Amazon. 



i. Y''., stffd. Brazil. 



2. Podocnemis lewyana. 



Podocuemis lewyana, A. JDum. Arch. Mus. vi. p. 242, pis. xviii. & 

 xix. (1852). 



Apparently closely allied to the preceding. Carajjace more de- 

 pressed, without keel. Front lobe of plastron not broader than 

 hind lobe. ISnout longer ; interparietal shield broader than long, 

 followed by a small triangular shield. Three large scales on the 

 outer side of the foot, upper largest. Shell olive, more or less 

 vermiculate or spotted with black. 



Length of shell 2G centim. 



Colombia (Bogota) and Venezuela. 



3. Podocnemis unifilis. 



Podocnemis unifilis, Trosch. in Schomh. Reise Brit, Guian. iii, p. G47 



(1848) ; Sclater, Proc. Zool. Soc. 1871, p. 745. 



dumeriliana, part., Oray, Cat. Sh, liept. i. p. 62 (1855). 



Chelonemys dumeriliana, part.. Gray, Suppl. Cat. Sh. liept. i. p. 8.3 



(1870), and Ann. ^ Mar/. N. H. (4) viii. p. G8 (1871), and App. 



p. 25 (1872). 



Agrees with P. dumeriliana in the shape of the shell and head 

 and the presence of a single interparietal shield ; with P. lewyana 

 in the presence of three large shields on the outer side of the foot ; 

 differs from both in the presence of a single dermal appendage on 

 the chin. Carapace brown, uniform or spotted with black, with 

 the edge yellowish or reddish ; plastron brown and yellowish. 

 Head dark brown, with yellow spots disposed as follows : — One on 

 the snout, one on each side of the nasal region, one from below the 

 eye to the mandible, one behind the eye, one above the ear, and a 

 pair on the interparietal shield. 



The species reaches a length of 31 centim., according to Schom- 

 burgk ; the shell of the largest specimen in the ^y^useum measures 

 11| centim. 



Guianas and jSTorthern Brazil. 



a. IIp'., spir. Upper Amazon. Mr. E. Bartlett [C.]. 



b. Hgr., stffd. Upper Amazon. 



c. Y'^g., spir. Para. 



d. e. Yg., spir. ? 



