1. TKIONTX. 249 



e, /, Ad., shells. India. R. McClelland, Esq. 



g. Ad., stflfd. India. 



h. Yg., stftil. India. 



3. Trionyx leithii. 



Aspilus cariiiiforus, part., Grcn/,Suppl. Cut. Sh. liejd. i. p. 101 (1870). 

 Trionyx kitliii, Grai/, Ann. S,- May. N. 11. (4) x. p. 334 (1872). 



gangeticus, part., Graij, Proc. Zool. Soc. 1873, p. 47, pi. viii.* 



leitiiii, part., Gray, I. c. p. 49. 



Isola leithii, Grai/, Ann. ^- May. N. II. (4) xii. p. l-"57 (1873). 

 ? Trionyx gangeticus, Murraij, Zool. Sind, p. 342 (1884). 



Intermediate between T. gangeticus and T. hurum. Agrees with 

 the former in the Avidth of the interorhital space, the comparatively 

 short mandibular symj)hysis, and the markings of the head ; with 

 the latter in the longer and more pointed snout, the absence of a 

 strong ridge on the inner alveolar surface of the mandible, and in 

 the presence, in the young, of four or more dorsal oceUi, which are, 

 however, smaller than in T. harum. 



This will probably prove to be a "Western form, ranging from the 

 Indus to Malabar. 



b. Hfr.'; iSl 1 P««°^^- ^'- ^''^^ '^-^ (Types.) 



c. Yg., stffd. Deecan. Col. Sykes [P.]. 



d. Yg., spir. Nelanibar River, Col. Beddome [C.]. 



Malabar. 



e. Y''g., spir. India. T. C. Jerdon, Esq. [P.]. 

 /, ff. Yg., Ptffil. India. 



A-k, Yg., .spir. India. 



l-m. Yg., spir. India. G. E. Mason, Esq. [P.]. 



n. Skull & shell. India. F. Day, Esq. [P.]. 



4. Trionyx hitruni. 



Trionvx gangeticus (non Cnv.), Guerin, Icon. li. A., Bept.^l. i. fig. 6 

 (1829) ; Les.'ion, in Belamj. Voy. Ind. Dr., Zool. p. 1^97 (18:^4) ; 

 Gilnfh. Rept. Brit. Ind. p. 47 (1864) ; Soicerby S; Lear, Tort. pi. H. 

 (1871). 



hurum, Gf-ay, Syn. Rept. p. 47, pi. x. (1831), and III. Ind. Zool. 



ii. pi. Ixvi. (1834) ; Anders. Ann. ^- Mar/. K. II. (4) ix. b. 382 

 (1872) ; Gray, Ann. c*)- May. K H. (4) x. p. 335 (1872), and Proc. 

 Zool. Soc. 1873, p. 49. 



ocollatus, Gray, III. Ind. Zcol. i. pi. Ixxviii. (1832), and Ann. 



^•May. N. II. (4) x. p. 337 (1872), and Proc. Zool. Soc. 1873, p. r,l ; 



Theob. Proc. As. Soc. Beny, 1875, p. 174, pi. v., and Cat. Rept. Brit. 



Ind. p. 29 (1876). 

 Gymnopus duvaucelii, part., Dum. ^- Bihr. ii. p. 487 (1835). 



ocellatus, Ihim. Sf- Bibr. f. c. p. 489. 



Tyrse gangetica. Gray, Cat. Tort. p. 47 (1844). 



* Copy of Hardwicke's MS. figures, made from specimens from Futtegurh. 



