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ART. XXII. — On Trigonophrys rugiceps. 

 By Edw. Hallo well, M. D. 



Gen. TRIGONOPHRYS, nob. 



Char. — Head very large, depressed ; upper eyelid triangular ; tongue large, sub- 

 circular, notched in front and posteriorly, more deeply behind, attached anteriorly, 

 free laterally, and in its posterior half ; upper maxillary teeth large, conical, recurved, 

 sharp pointed ; two groups of vomerine teeth on a line with the anterior margin of 

 the posterior nares, nearer to these than to each other; posterior nares large, sub- 

 circular; eustachian foramina of moderate size; no vocal vesicles either internal or 

 external ; tympanum indistinct ; four fingers completely free ; toes palmate at their 

 base only ; first cuneiform bone presenting a prominence externally, with a well 

 defined projecting edge; transverse processes of the sacral vertebrae not dilated. 



Tkigonophrys rugiceps. 



Plate 36. 



Sp. Char. — Vomerine teeth in two small patches at the inner edge of the internal 

 nares ; dental apophyses very distinct ; toes pointed, palmate at the base only ; fourth 

 toe much longer than the others ; head presenting numerous asperities upon its upper 

 surface ; body pustulated above and upon the sides ; abdomen smooth ; two glands, 

 triangular in shape, upon the upper surface of each thigh, and two larger ones upon 

 the breast ; color olive or violet above with numerous large dark colored ovoid spots 

 margined with white ; the interspaces in the young and middle aged of a beautiful 

 rose color ; extremities olive colored above, with large and broad bands of black, 

 margined with white, the interspaces more or less tinged with rosy red ; abdomen 

 white, black spotted. 



Description. — The head is very large, broader than long, flattened or very slightly 

 convex above, depressed, the inclination in front not very abrupt; the nostrils, which 

 are two crescentic openings, are situated about midway between the margin of the 

 upper jaw and the inferior border of the orbit, nearer to the former, four lines apart; 

 eighty-two teeth may be counted in the upper jaw, the anterior and middle ones 

 longer than the posterior, concave posteriorly ; their convexity presenting forward, 

 very much enveloped at the base ; two movable bucklers beneath the skin, posterior 



