42 DR. MALCOLM SMITH ON 



The young on leaving the water vary from black to bronze 

 brown, with light brown or golden patches on the limbs. The light 

 flank mark may or may not be present. 



They are very active, much more so than their parents, and 

 given plentj' of food grow rapidlj'. One I kept measured after two 

 months 28 mm. from snout to vent. 



Rana nigrovittata. 



Head and body ; length a little more than 1^ times the 

 breadth ; snout rounded. Nostrils nearer the tip of the snout than 

 the ej'es. Eyes towards the upper part of the head, looking outwards 

 and upwards, not twice as far apart as the nostrils. Spiraculum 

 sinistral, directed backwards and upwards, nearer the eye than the 

 vent, prominent in life. Anal tube pointing straight backwards and 

 downwards, opening on the right hand side of the caudal membrane. 

 Mouth subterminal ; sides with a single row of papillae, below a 

 double row. Beak broadly edged with bhick, finely serrated ; upper lip 

 with a long contiTiuous row of teeth, followed by a second row broadly 

 interrupted by the beak ; lower lip with three long continuous rows, 

 or the upper very narrowlj' interrupted. Tail, about twice as long 

 as the head and body, four times as long as deep ; tip bluntlj' pointed ; 

 crests fairly full, upper equal to or a little deeper than lower, not ex- 

 tending on to the back ; both slightly convex. Dorso-lateral fold 

 defined. Toes nearly fully webbed. 



Colour. Light olive to light brown, finely speckled with darker. 

 A dark band passsing through the ncstril and eye on to the flank. 

 Tail spotted with black. Below pale grey. 



Dimensions. Total length, 37 mm. Head and body, 13. 

 Breadth of body, 8. Depth of tail, 6. 



The young on leaving the water resemble their parents. 



Large numbers of these tadpoles were found at the end of JIareh, 

 in the small mountain streams of Kliao Sebab, Chantabun. They were 

 found at all elevations up to 1,500 feet, inhabiting the quiet pools and 

 backwaters branching oS'from the main current. 



Bufo parvus. 



Head and body ; length 1^ to 1| times its breadth ; snout rounded. 

 Nostrils nearer the eyes than the tip of the snout. Eyes towards the 

 upper surface of the head, looking outwards and slightlj' upwards, 



JOUnN. NAT. IIIST. SOO. SIAM. 



