4 i CINOSTEKNTDJE. 



rt-i. cJ,spir. Cosamaloapam, Mexico. M. Salle [C]- (Types of 



Sivanka tnacidata.) 

 c-tl (S 9 , spir. Guatemala. 0. Salviu, Esq. [0.]. 



e. (5',stfr(i. C. America. 



1 1 . Cinosternum cruentatum. 



Cinostcmum cnientiitiim, A. Diim. Cat. Meth. Ropt. p. 10 (18ol), 

 and Arch, da Mus. vi. p. 238, pi. xvi. (l8o-J) ; Orai/, Cat. S/t. liept. 

 i. p. 44 (185o) ; Bocourt, Miss. Sc. Mex., Rept. p. 23 (1870), and 

 Journ. de Zool. v. p. 3U8 (1876) ; G'dnth. Rial. C.-Am., Rept. p. 13, 

 pis. ix.-xi. (188">). 



mexicanum, Lpconte, Proc. Ac. Phi/ad. 1854, p. 182 ; Riitimeyer, 



Verh. yaturf. Ges. Basel, vi. p. 41 (1«74). 



scorpioides, part., Gray, I. c. p. 44. 



triliratum, Leconte, Proc. Ac. Philad. 1859, p. 6; G'dnth. I.e. 



p. 14. 

 Swanka scorpioides, part., Grai/, Suppl. Cat. Sh. Rept. i. p. G7 (1870). 



mexicaua, Gray, I. c. p. 69. 



crueiitata, Gray, I. c, 



trilirataj^i^rffy, /. c. 



Cinosteruuiu shawianum (non Belt), Bocourt, Journ. de Zool. v. p. 397. 



Head moderate ; jaws strong : beak not or but very feebly hooked. 

 Digits extensively webbed. Carapace tricarinate, the keels becom- 

 ing very obtuse in old specimens. Plastron entirely closing the box 

 and without bridge in the adult ; lobes well movable, anterior 

 usually longer than the immovable ])ortion, posterior not nicked ; 

 gular shield about half the length of the front plastral lobe ; pectoral 

 shields triangular or forming a very short median suture ; axillary 

 and inguinal shields usually separated. Tail of male ending in a 

 nail-like horny tubercle. Carapace brown ; plastron yellow or 

 brown, the sutures between the shields blackish. Sides of head 

 and neck marbled with brown and yellowish (in spirit) ; jaws and 

 throat yellowish, s])otted or streaked with brown. 



Length of shell 15 centira. 



Central America. 



F. Suniichrast [C.]. Messrs. 



Salvin and Godman [P.]. 

 F. Sumichrast [C.]. Messrs. 



Salviu and (jrodraan [P.]. 

 F. Suniichrast [C.]. Messrs. 



Salvin and Godman [P.]- 

 Mr. Hoege [C.]. 



Rev. J. Allen [P.]. 

 T. Bell, Esq. [P.]. 



Cinosternum albogulare, Bocourt, Miss. Sc. Mex., Rept. p. 23, and 

 Journ. de Zool. v. p. 399, should perhaps be regarded merely as a 

 variety of C. cruentatum, characterized by uniform yellowish-white 

 jaws. — Uab. Costa Rica. 



