98 CKECILIID JB. 



II. 125 to 145 circular folds. 

 Circular folds on the median portion of the 



body alternately complete or incomplete 3. ihomensis, p. 98. 

 Circular folds on the median portion of the 



body all incomplete 4. brasiliensis, p. 99 . 



Tentacle close to the eye 5. proximus, p. 99. 



III. 228 circular folds, complete; tentacle 



close to the eye 6. simus, p. 99. 



1 . Dermophis mexicanus. (Plate VIII. fig. 2.) 



Siphonops mexicana, Gray, Cat. p. 59. 

 Siphonops mexicanus, Dum. 8f Bibr, p. 284 ; A. Dum. I. c. p. 23, 



pi. — . f. 10. 

 Dermophis mexicanus, Peters, Mon. Berl. Ac. 1879, p. 937, pi. — . 



f.6. 



Teeth small, subequal ; inner mandibulary teeth few, indistinct. 

 Snout rounded, moderately prominent, about as long as the distance 

 between the eyes ; latter distinct ; tentacle below and in front of 

 the eye, nearer the latter than the nostril. Body stout, moderately 

 elongate ; 150 to 170 circular folds, those on the anterior half and on 

 the hindermost part of the body complete, the others alternately 

 complete or interrupted on the belly. Tail indistinct, rounded. 

 Greyish brown above, whitish beneath ; the folds dark brown. Total 

 length 425 millim. ; greatest diameter of body 20 millim. 



Central America. 



a-b. Adult. Mexico. Capt. Sir Edw. Belcher [P.]. 



c. Adult. Mexico. C. Johnston, Esq. [P.]. 



d, e. Adult. Pacific coast of Guatemala. 0. Salvin, Esq. [P.J. 

 /. Adult. Panama. Capt. J. C. Dow [P.]. 

 g. Hgr. ? Derby Museum [P.]. 



2. Dermophis albiceps. (Plate VIII. fig. 1.) 



Teeth small, subequal. Snout rounded, moderately prominent, 

 as long as the distance between the eyes ; latter distinct ; tentacle 

 in front of, and slightly lower than, the eye. Body elongate ; 170 

 circular folds, those on the anterior half and on the hindermost part 

 of the body complete, the others alternately complete or interrupted 

 on the belly. Tail indistinct, rounded. Blackish grey, the head 

 white. Total length 210 millim.; greatest diameter of body 4 1 

 millim. 



Ecuador. 



a. Hgr. P Ecuador. Mr. Buckley [C.J. 



3. Dermophis thomensis. 



Siphonops thomensis, Bocage, Jorn. Sc. Lisb. xv. 1873, p. 224. 

 brevirostris, Peters, Mon. Berl. Ac. 1874, p. F>17, pi. 1. f. 2. 



