332 CHELYDID.E. 



b-d. Purchased, May 3, 1871. From Madagascar. See P. Z. S. 



1871, p. 543. 

 e. Purchased, June 8, 1871. From Madagascar. 



44. Sternothterus derbianus, Gray. Derbian Sternothere. 

 Hob. West Africa. 



a. Purchased, Aug. 30, 1870. 



b. Received in exchange, Oct. 25, 1870. 



Genus PELOMEDUSA. 



45. Pelomedusa gehafi (Riipp.) . Abyssinian Pentonyx. 

 Hab. Abyssinia. 



a. Presented by the Hon. Mr. Melville, June 2, 1868. 



Genns PLATEMYS. 



46. Platemys gordoni (Gray) . Gordon's Terrapin. 

 Hab. Trinidad. 



a. Deposited by the Hon. A. Gordon, July 23, 1868. Specimen 

 described and figured as Hydraspis gordoni by Dr. Gray, 

 P. Z. S. 1868, p. 563, pi. XLII. Captured by Mr. Gordon 

 " near the mountain of Tamana, Trinidad." 



47. Platemys geoffroyana (Sehweigg.) . Geoffroy's Terrapin. 

 Hab. Argentine Republic. 



a, 6. Presented by George Wilks, Esq., C.M.Z.S., June 17, 

 1871. See P. Z. S. 1871, p. 623. 



Genus HYDROMEDUSA. 



48. Hydromedusa maximiliani (Mikan). Maximilian's Ter- 



rapin. 



Hab. Brazil. 



a-d. Presented by Dr. Palin, C.M.Z.S., Sept. 19, 1871. 



Genus CHELODINA. 



49. Chelodina oblonga, Gray. Oblong Chelodine. 

 Hab. West Australia. 



a. Presented by W. Ayshford Sandford. Esq., March 18, 1856. 



