RANA HEXADACTYLA. 



405 



been observed by Professor Peters. I give the measurements, in millimetres, of five of onr specimens for 

 comparison with those found by him : — 



It will be seen from these measurements that the differences in the length of the limbs of Ceylonese and 

 Chinese specimens on the one hand, and of Javan on the other, are not constantly so great as has been 

 shown by Peters. I have selected a specimen from Java, sent from the Leyden Museum as Rana kuhlii. 



Under these circumstances I should consider it as an error of omission to " confound " the two forms, 

 but think it better still to distinguish them as varieties, as I have done formerly, than to adopt a species 

 founded on doubtful characters. 



EaNA HEXADACTYLA. 



Rana hexadactyla. Lesson, in Belang. Voy. Ind. Orient. Rept. p. 331. 



Dactylethra bengalensis, Less. III. Zool. pi. 47. 



Rana cutipora, Dum. §• Bibr. Erpet. gen. viii. p. 339. 



robusta, Blyth, Journ. As. Soc. Beng. 1854, xxiii. p. 298. 



Snout triangular, depressed, somewhat pointed in front, without canthus rostralis ; tym- 

 panum rather indistinct, about as large as the eye. Lower jaw with two distinct, but 

 scarcely prominent apophyses in front ; the vomerine teeth are small, and form two oblique 

 series, commencing from the inner anterior angle of the choanag, and converging behind. 

 A transverse fold of the skin unites the posterior angles of the orbits. Skin of the back 

 nearly smooth ; of the throat, belly, sides, and hind part of the thighs tubercular, some of 

 the tubercles being more prominent sometimes than the others, and forming continuous 

 series. Hind hmbs short and thick, with very wide skin ; the distance between vent and 

 knee is less than one-half of the length of the body. Fingers pointed ; tips of the toes very 

 slightly swollen ; toes entirely webbed, the web reaching to the tips of the toes ; a cuta- 

 neous fringe along the outer margins of the first and fifth toes ; no fold along the metatarsus. 

 The fourth toe is not much longer than the third and fifth ; metatarsus with a single small 

 tubercle. 



Adult specimens preserved in spu-its are uniform chocolate-brown above, with or witliout 

 white vertebral streak ; the lower parts uniform white, the hinder side of the thighs brown 



* This is taken from the tip of the nose to the vent. 



t This length is taken from the vent to the extremity of the longest toe, whilst Peters probably mea- 

 sured from the hip-joint. 



