6 TYPHLOPID^. 



58 times in the total length ; tail once and a half as long as broad, 

 rounded. 22 scales round the body. Dark brown ; head and anal 

 region whitish. 



Total length 158 millim. 



Costa Rica. 



3. Helminthophis petersii. (Plate I. fig. 1.) 



Helminthophis petersii, Boukng. Ann. &; Mag. N. H. (6) iv. 1889, 

 p. 360. 



Rostral half the width of the head, extending to between the 

 eyes, truncate posteriorly, and forming a broad suture with the 

 frontal ; two superposed proeoculars and a subocular ; eye distin- 

 guishable under the ocular ; four upper labials, first largest, third in 

 contact with the subocular. Diameter of body 55 times in the 

 total length ; tail a little longer than broad, ending in a spine. 20' 

 scales round the body. Brown, each scale darker in the centre; 

 snout and anal region yellowish. 



Total length 110 millim. 



Ecuador. 



n. Guayaquil. Mr. Fraser [C.]. (Type.) 



4. Helminthophis gtientheri. (Plate I. fig. 2.) 



Helminthophis guentheri, Boulcng. Ann. 8^' Mag. N. H. (6") iv. 1889, 

 p. 361. 



Rostral one third the width of the head, extending to the level of 

 the eyes, rounded posteriorly and forming a suture with the frontal, 

 which is very broad; a single prasocular ; no subocular; eye dis- 

 tinguishable under the ocular ; four upper labials, first largest, third 

 in contact with the ocular. Diameter of body 50 times in the 

 total length ; tail twice as long as broad, ending in a spine. 20 

 scales round the body. Olive-brown above, head white ; yellowish 

 inferiorly, with small scattered olive spots. 



Total le]]gth 170 millim. 



Brazil. 



a. Ad. Porto Real, Prov. Rio Janeiro. M. Hardy du Dr^neuf 



[C.]. (Type.) 

 b-c. Ad. Poito Real. M. Hardy du Dreueut 



[0.]. 



5. Helminthophis albirostris. 



Rbinotyphlops albirostris, Peters, Mon. Berl Ac. 1867, p. 402. 

 Liotyphlops albirostris, Peters, Sitz. Ges. naturf. Fr. 1881, p. 69 ; 



Bocourt, Mks. 8c. Mex., licpt. p. 501, pi. xxx. fig. 1 (1882). 

 Typblo])? (Idi(lt^•phlops) enuinctus, Garman. N. Am. Jifipt. i. p. 3 



(1883). ' it 



