4 University of Michigan 



The dark brownish green adults were all taken under rocks 

 in the water, whence they were calling. One transforming 

 specimen was on a leaf. This was bright green with tiny dark 

 dots, and a white line from the eye over the tympanum. 



Diagnostic characters of mature tadpole: Spiracle sinistral, 

 anus dextral, eye not visible from ventral surface, upper fin 

 crest not extending beyond hind curve of body, distance from 

 spiracle to base of hind limb contained 1.5 times in its dis- 

 tance from the snout, labial teeth (6-7/8), brown above, light 

 cross bars on dorsum of tail, crests unpigmented, greatest 

 length of tadpole 60 mm. 



Description of mature tadpole: Length of body contained 

 2.9 times in total length; width of body 1.5 in its own length; 

 nostril nearer to eye than to snout ; eye dorsal, nearer to snout 

 than to spiracle ; distance between nostrils greater than inter- 

 orbital width, less than width of mouth ; spiracle sinistral, its 

 distance from the base of the hind limb contained 1.5 times 

 in its distance from the snout ; anus dextral ; depth of the mus- 

 cular part of tail at base contained 1.5 times in greatest 

 depth of tail. Upper labium with 7 equal rows of teeth, the 

 outer three somewhat fragmented, the innermost narrowly 

 broken in the middle ; lower labium with eight rows of teeth, 

 of nearly equal length, the outer four somewhat fragmented ; 

 a complete circlet of papillae around mouth ; in repose this 

 contracts into a triangle, apex forwards, lateral angles curved 

 in and back. The general color was brown, with three lighter 

 reddish brown cross bars on the muscular part of the tail, the 

 crests unpigmented, and the belly pale; total length 53 mm., 

 head and body 18 mm., tail 35 mm. 



These tadpoles were most frequently seen in numbers cling- 

 ing to the rocks over which a swift current of water was 

 streaming. They had by far the best developed sucking disks 

 of the four forms in the stream. 



Phyllobates 



Barbour and I (Proc. Biol. Soc. Washington, 34, p. 159, 

 1921) redescribed Phyllobates talamancae (Cope) from two 

 specimens from Santa Cecilia, Costa Rica, and described 



