SHIELD REPTILES. 39 



Z. Skeleton, unmounted. 



Malaclemmys concentrica, Gray, P. Z. S., 1869, p. 192, f. (skull). 

 N. America. Mus. Utrecht. 67, 4, 2, 155. 



m. Skeleton without sternal shield or lower jaw. 

 N. America. Mus. Utrecht. 67, 4, 2, 154. 



n. Shell only, 6 in. Black above. 

 N. America. 67, 5, 2, 312. 



/. Shell only, 6£ in. 

 N. America. 



0. Sternum of young shell. Affixed to a back of a Pelomedusa. 

 N. America. Mus. Utrecht. 67, 4, 2, 163. 



Var. 4. tuberculifera. The three central vertebral plates ivith a 

 central tubercle, the hinder tubercle orbicular. 



h. Shell only, young. California. 

 Malaclemmys tuberculifera, Gray, Cat. Tort. B. M. 

 N. America. Mr. J. Drummond. 



Genus 2. DAMONIA. 



1. Damonia maceocephala, Gray, Cat. Supjal. p. 43. 



a. Animal and shell, 4^ in. 



Geoclenimys macrocephala, Gray, P. Z. S. 1859, 470, t. 21. 

 Siam. Mouhot. 59, 7, 8, 4. 



6. Animal and shell, 3f in. 

 Siam. Mouhot. 59, 7, 8, 5. 



h. Animal and shell, stuffed, 8^ in. Sternum flat. 

 Camboja. Mouhot. 61, 6, 1, 7. 



i. Animal and shell, 2 in., dry. Very bluntly 3-keeled. Areola 

 large, regularly punctate, with a brown margin above and white 

 margin below. 

 Camboja. Mouhot, 60, 8, 28, 6. 



g. Animal, young in spirit. 

 Cistudo gibbosa, Blechcr, M.S. 63, 12, 4, 38. 

 Borneo. 



Je. Animal in spirits. Mus. Utrecht. 



Emys trijuga. Mus. Utrecht. 60, 8, 14, 232. 



a. Animal and shell, 5£ in. stuffed. 



Damonia oblonga, Gray, Ann. and Mag. Nat. Hist. 1871, p. 367. 

 Cat. Append, p. 14. 

 Batavia. 71, 12, 10, 2. 



e. Skeleton and shell, 6£ in., very obscurely keeled. 



" Emys subtrijuga." Mus. Leyden. 



Emys trijuga skeleton, b. Cat. Sh. Rep. p. 20. 

 Borneo. 48, 10, 31, 16. 



/. Skeleton and shell, 4 in. Back much ended. 

 Siam ? Mus. Utrecht. 67, 4, 2, 148. 



