1. ciNosTKRNxrxr. 43 



Jaws strong; beak feebly hooked. Carapace unicarinate, Iho 

 '-keel disappearing in old specimens ; marginals often much swollen. 

 Plastron completely closing the box, not eraarginate ])osteriorl\' ; 

 lobes well movable in tlie adult, front one longer than the iixed 

 portion ; gular shield not more than half the length of the front 

 plastral lobe, usually less ; suture between the pectoral shields much 

 shorter than that between the brachials ; axillary and inguinal 

 shields separated or narrowly in contact. Tail ending in a claw- 

 like horny scute. Carapace brown, plastron yellowish or brownish, 

 sutures dark brown or black ; head dark brown above and on tlio 

 sides ; snout and two longitudinal temporal bands spotted or vernii- 

 culated with yellowish ; jaws uniform yellowish or horny brown in 

 the female, witli fine brown lines in the male. 



Length of skull 14| centim. 



Central America ; Coloml)ia. 



a. $,spir. Cosamaloapam, Mexico. M. Sall(5 [C]. (Typo of 



Swanka tnaculata.) 



b. S ) skel. Cosamaloapam, Mexico. M. Sallt? [C.]. 



c. Ilgr., spir. Playa Mceute, Mexico. M. Salle [0.]. (Typo of C. 



hrcviyulare.) 



d. 2, spir. Huamuchal, (luatemala. O. Salvin, i"]sq. [C.]. 



e. Yg., spir. Coban, Vera Paz. O. Salvia, Esq. [C.] 1 (Types of 



> C. coba- 



f. Yg., spir. Cahabon, Vera Paz. F.C.Sarg,Esq.[C.]. ) man.) 

 g-h. 5, spir. Vera Paz. O. Sahin, Esq. [C.]. (Types 



of Sioanka maculata.) 



i. 2 , stffd. C. America. 



k,i,vi. s 2, ? 



shells. 

 «. (S , skel. ? 



10. Cinosternum berendtianum. 



Cinosternum bereudtianum, Cope, Proc. Ac. Philad. 1865, p. 189 ; 



Bocourf, Journ. dc Zool. v. p. 3Uo (1876). 

 Swauka maculata, part., Grai/, Supj)l. Cat. Sh. Pept. i. p. 68 (1870). 

 Cinosternum effeldtii, Peters, Man. Perl. Ac. 1873, p. 603, pi. — ; 



Bocourt, I. c. p. 396 ; Gilnth. Biol. C.-Am., Pept. p. 16 (1885). 

 leucostomum, part., G'unth, I. c. p. 17, pi. xvi. 



Snout longer than in G. leucostomum ; beak strongly hooked in the 

 male. Carapace unicarinate. Plastron completely closing the box, 

 not emarginate posteriorly ; lobes well movable, front one not 

 longer than the fixed portion ; gular shield more than half the 

 length of the front plastral lobe ; suture between the pectoral shields 

 shorter than that between the humerals ; axillary and inguinal 

 shields separated or narrowly in contact. Tail ending in a claw-like 

 horny scute. Carapace brown; plastron yellowish or brown, sutures 

 dark brown ; upper surface of head dotted with brown ; jaws spotted 

 or streaked with brown. 



Length of shell 10| centim. 



Central America. 



