14 PROCEEDINGS OF THE NATIONAL MUSEUM tol. 74 



tail musculature almost clear citrine drab except for lower rim or 

 edge; Most of dorsal crest and caudal tip at lower crest heavily 

 spotted with large black spots and these on the outer half of the 

 crest. Tail tip almost completely black. Space between black more 

 or less colonial buff or sulphur yellow. 



In G. texensis, tadpoles are grayish in cast, not so purplish or 

 brownish as in G. carolinensis. Venter and side of belly with round 

 light areas but not prominent stripes as in G. carolinensis. In alcohol, 

 light bands on basal tail musculature on sides remain in G. carolinensis. 

 There is no prominent bands of this sort or faintly so in G. texensis 

 and in alcohol they are not apparent. 



General appearance. — Tadpole small (23 mm.), flat, wide, less ellip- 

 tical or round than that of G. carolinensis; snout less truncate than in 

 G. carolinensis. Tail medium, obtuse or rounded, regularly with 

 black tip. Dorsal or ventral crest not equal to musculature. The 

 dorsal crest at least to the vertical of the developing hind legs. 

 Spiracle median as in G. carolinensis. Anus median as in G. carolin- 

 ensis. Eye on lateral axis but less so than in G. carolinensis and not 

 so plainly visible from ventral aspect. Canthus more or less as in 

 G. carolinensis. Muciferous crypts indistinct. 



Mouth, parts. — Teeth ^. No horny mandibles; no labial teeth; no 

 papillae; upper labial edge very black and emarginate in the middle. 

 In G. texensis this edge is very much more black and prominent than 

 in G. carolinensis. On the back of this edge appear little black ex- 

 crescences or points not observed in G. carolinensis. In center of 

 lower labium is a gray-colored median beaklike prolongation. 



Measurements. — Length of body (10-11 mm.) in tail (12-15.4 

 mm.) 1.09-1.54, average 1.28. Width (6.0-7.5) of body in its own 

 length 1.44-1.66, average 1.52. Depth (4.0-6.0) of body 1.25-1.75 in 

 body width, average 1.49. Depth of body 1.83-2.47 in body length, 

 average 2.26. Depth (3.6-4.4) of tail in length of tail 3.-3.5, average 

 3.3. Muscular part (2.8-3.4) 1.17-1.46 in depth of tail, average 1.29. 



The dimensions of the largest tadpole are: 



Mm. 



Spiracle to vent 



Spiracle to eye 



Eye to snout 3. 



Eye to nostril 



Nostril to snout 



Mouth 4.0 



I nterorbital distance 4. 



Internasal distance 



Mm. 



Total length 25. 



Body length 10. 



Body depth 4. 4 



Body width 6. 



Tail length 15. 4 



Tail depth 4. 4 



Musculature of tail 3. 



Spiracle to snout 



