THE 



JOURNAL 



OF THE 



Natural History Society of Siam 



Volume II. BANGKOK. Number 4. 



ON TADPOLES FROM SIAM. 



By Malcolm A. Smith, m.k.c.s., f.z.s. 



With two Plates. 



Inbex. 



PA<iE. 



Rrtnn Luhlii 262 



]{. rui/ulofiii 263 



Ji. cnncrironi 264 



K. limiwchdn'f: 2o5 



K. iniicroddctifhi 265 



L'. l,itemlh 206 



R. fTi/thnra 267 



Rhaciiphuius leucomystd.i- 267 



Microhylu oniati 268 



M. buileri 268 



Gli/j>Ii()(/lot!sus molo--<siis 269 



CnUneihi (juttuhtia 270 



Me</iil(iji/irj/s montanu 271 



M. pcldi/i/to/des 272 



M. //((■•<xe'lti/ 274 



Jiujh 7ne/iinoi<ticiis 274 



In the following paper, whilst describing some unknown tad- 

 poles, I have taken tlie opportunity of reviewing many other known 

 species, and of comparing my own observations upon them in Siam, 

 with those of other naturalists both in this and in the neighbouring 

 countries. I have also included some remarks upon the breeding habits 

 of their parents. With two exceptions, Rana ktihln and R. cancrivora, I 

 have been able to keep and watch the development of all the species 

 referred to. 



I have never experienced the difficulty, which some seem to 

 have had, in transporting certain tadpoles, in particular those of the 

 genus Microlujla. The Engystomatid larvae are certainly more delicate 

 than those with the Rauid type of mouth, but by taking precautious to 



