406 me, g. a. boulengee os apodal bateachians. [may 21, 



*2. Hypogeophis eostbatus. 



Ccedlia rostrata, Cuv. E. A. 2nd ed. ii. p. 100 (1829); Dum. & 

 Bibr. viii. p. 279 (1841) ; Peters, Mon. Berl. Ac. 1877, p. 456. 



Hiipofieopliis rostratus, Peters, Mon. Berl. Ac. 1879, p. 936, and 

 Sitzb. Ges. natiirf. Pr. 1880, p. 53 ; Bouleng. Oat. p. 96, pi. vii. 

 iig. 2 (1882) ; Stejneg. Proc. U. S. Nat. Miis. xvi. 1894, p, 738. 



Seychelles. 



*3. Hypogeophis alteenajs^s. 



Hypogeophis alternans, Stejneg. Proc. U. S. Nat. Mus. xvi. 1894, 

 p. 739. 

 • Seychelles. 



4. CiECILIA. 



Ccedlia, part., Linn. S. N. i. p. 229 (1766). 



Ccedlia, Wagl. Svst. Amph. p. 198 (1830) ; Dum. & Bibr. viii. 

 p. 274 (1841); A. Dum. Mem. Soc. Cherb. ix. 1863, p. 311; 

 Peters, Mon. Berl. Ac. 1879, p. 934 ; Bouleng. Cat. p. 93 (1882). 



Synop>sis of the Species. 



I. Total length not 60 times greatest diameter of body. 



] 35-150 circular folds, last 40 to 50 not interrupted on the 

 dorsal line 1. tentaculaia. 



115-140 circular folds, last 16 to 20 not interrupted on the 



dorsal line 2. isthmica. 



175 circular folds, all complete 3. huckleyi. 



II. Total length more than 60 times greatest diameter of body. 



207-209 circular folds, nearly all complete 4. j>olysona. 



160-170 circular folds, interrupted on the dorsal and ventral 



lines 5. pachynema. 



210-255 circular folds, interrupted on the dorsal and ventral 

 lines 6. gracilis. 



*1. CiECILIA TENTACULATA. 



Ccedlia, Linn. Amoen. Acad. i. p. 489, pi. xvii. fig. 1 (1754). 



Ccedlia tentaculata, part., Linn. Mus. Ad. Frid. p. 19 (1754), 

 and S. N. i. p. 393 (1766). 



Ccedlia tentaculata, Shaw, Zool. iii. p. 599, pi. cxxxvi. (1802) ; 

 Peters, Mon. Berl. Ac. 1879, p. 934; Bouleng. Cat. p. 93 (1882). 



Ccedlia albiventns, Daud. Eept. vii. p. 423, pi. xcii. fig. 1 

 (1803) ; Dum. & Bibr. viii. p. 277 (1841). 



Guianas. 



*2. CECILIA ISTHMICA. 



Ccedlia rostrata (non Cuv.), Giinth. P. Z. S. 1859, p. 417. 



Ccedlia isthmica, Cope, Proc. Am. Philos. Soc. xvii. 1877, p. 91 ; 

 Bouleng. Cat. p. 94, pi. vi. fig. 1 (1882). 



Ccedlia guenthen, Peters, Mon. Berl. Ac. 1879, p. 936. 



Ccedlia pachynema (non Gthr.), Bouleng. Bull. Soc. Zool. 

 Prance, 1880, p. 48. 



Isthmus of Darien ; Ecuador. 



