2. KAIfA. 7 



Polypedates, sp., Tsohudi, I. e. p. 78 ; Giinth. I. e. p. 77. 



Strongyloptis, Tschudi, I. c. p. 79. 



Pyxiceplialus, Tschudi, I. c. p. 83 ; Cope, I. o. 



Pyxiceplialus, sp., Bum. %■ Bibr. I. c. p. 442. 



Limnodytes, Dum. ^ Sibi: I. c. p. 510. 



Pelophylax, Mtmng. Syst. Rept. i. p. 31. 



Tomopterna (Bibr.), Gunth. I. c. p. 7. 



Sphssrotlieca, Gfimth. I. c. p. 20. 



Ranula, Peicrs, Mon. Berl. Ac. 1859, p. 402. 



Dicrogloasus, CHinth. Proc. Zool. Soc. 1860, p. 158 ; Cope, I. c. 



Hoplobatrachus, Peters, Mon. Berl. Ac. 1863, p. 449 ; Cope, I. c. 



Staurois, sp., Cope, I. e. 



Amolops, Cope, I. o. 



PoHia, Stemdachn. Novara, Amph. p. 16. 



Pachybatrachus {mn Eeferstein), Mivart, Proc. Zool. Soc, 1868, 



p. 659. 

 Clinotarsus, Mivart, ibid. 1869, p. 227. 

 Trypheropsis, Cope, Proc. Ac. Philad. 18e8,p. 1 17. 

 Maltzania, Boetiger, Abhandl. Senck. Ges. xii. 1881, p. 417. 



Pupil horizontal. Tongue free and deeply notched behind t. 

 Vomerine teeth. Tympanum distinct or hidden. Fingers free ; toes 

 webbed, with simple or dilated tips. Outer metatarsals separated 

 by web. Omosternum and sternum with a strong bony style. 

 Terminal phalanges acute, transversely dilated or T-shaped. 



Cosmopolitan, except the southern parts of South America and 

 New Zealand; one species from the extreme north of Australia. 



The study of the numerous species included here in Rana shows 

 the impossibility of dividing them into genera, or even subgenera, 

 according to the dilatation or non-dilatation of the tips of the fingers 

 and toes. The extreme forms, viz. Rana hexadactyla and R. afghana, 

 show indeed a very marked difference respecting the shape and struc- 

 ture of the fingers and toes — the former having them pointed ; the 

 latter dilated into very large disks sapported by regularly T-shaped 

 phalanges. But, when we meet with such forms as B. malabarica, 

 R. curtipes, R. inguinalis, &c., we must hesitate before referring 

 them to the " Platydactyla " or to the " Oxydactyla," and, in fact, 



4. lAmmodytes lividus, Blyth, Journ. As. Soc. rriii. p. 299. — Colombo. 



5. Limnodytes nigrovittatus, Blyth, ibid. xxir. p. 718. — Tenasaerim. 



6. Eana attilabris, Blyth, 1. o. p. 720.— Pegu. 



7. Bana neweraelUa, Kelaart, Prodr. Faun, Zeyl. i. p. 192. — Ceylon. 



8. Limnodytes mutMlis, Kelaart, ibid. ii. p. 19. — Colombo. 



9. Lim/nodytes maoulata, Kelaart, 1. c. — Gfelle. 



10. Sana nebmlosa, Hallow. Proe. Ac. Philad. 1860, p. 504. — Hongkong. 



11. Soma multistriata, Hallow. 1. c. — Hongkong. 



12. Bana adtrita, Troeehel, in Miiller's Wirbelth. Mex. p. 82. — ^Mexico. 



13. Bana mismriensis, Wied, Eeise N. Amer. i. p. 115. — Missouri. 



14. Bana spinidactyla, Coto, Proc. Ae. Philad. 1865, p. 197. — Natal. 



15. Pyxicephakis frithii, Theobald, Cat. Eept. As. Soo. Mus. 1868, p. 81. — 

 Birmah. 



16. Sana cwculosa, Eice & Davis, in Jordan's Man. Vertebr. 2nd edit. p. 255. 

 — Indiana. 



t In a few oases the incision is not very deep. 



