TADPOLES FROM SIAM. 2«5 



The only important point in which my specimens differ from 

 Van Kampen's is in the length of the third or lowest series of teeth 

 in the lower lip. He states that this row is much shorter than 

 the one above — the length of the interval without the papillae : in 

 mine, however, it is nearly as long as the one above and at least three 

 times as long as the interval without papillae. In colouration they 

 agree very well, but mine have a proportionately shorter tail. 



Total length, 37 ; head and body, 15 mm. 



Rana limnocharis Wiegm. 



Van Kampen. N^tnmk. TijMscli. No.l.-Ind., T;XTX, p .^6 (1909) : 

 Smith, .lonrn. Nat. Hist. Soo Slam, II, p. I6.t (19161; Annaiulak', 

 Mein. Asiat. Soe. Bengal, VI, p. 133, fig. 2 and pi. VI (1917). 



I have obtained the tadpoles of this frog in February (the 

 middle of the dry season), as well as throughout the rains from July 

 to November. Annandale has figured the mouth-parts from a speci- 

 men obtained in Madras. It differs from the Siamese form, and also 

 that of Java {ride Van Kampen) in that the papillae are complete 

 along the under lip. In all the specimens that I have examined there 

 is a well marked gap or space in the middle, devoid of papillae. 



Rana macrodactyla (Giinther). 



This frog inhabits the padi-fields and swampy places in and 

 around Bangkok, and for some reason has a curion.sly local distribution. 

 I know of some half dozen spots from where I can oblain as many speci- 

 mens as I wish, but the rest of the country, although not differing ap- 

 parently in any way, seems to be entirely devoid of them. 



DESCRIPTION OF THE TADPOLE. 



Head and hodij. Length twice its breadth, somewhat flattened 

 both above and below, snout rounded. Nostrils nearer the tip of the 

 snout than the eyes. Eyes looking almost entirelj' outwards, hardly 

 any of the head visible on their outer sides when viewed IVom above; 

 twice as far apart ai the no-striLs. Spiraculum sinistral, ecjuidistant be- 

 tween the eye and the vent, long and prominent in life. Anus dextral. 



Tail. Three and a half times as long as deep, tip pointed. Crests 

 moderate, upper 1^ to 2 times the depth of the lower, not extending 

 on to the back. 



Mouth. On the ventral surface. Beak narrowly edged with 



VOL. II, DKC. I'.iir. 



