in the Collection of the British Museum. 15 



*Cacophis modestus, Othr. West Australia. Mr. Duboulay. 

 *Pseuclonaja affinis, Gthr. Australia. G. Kreflft, Esq. 

 *Atractaspis micropholis, Gihr. Africa. St. G. Mivart, Esq. 



Geophis latijrons. 

 Gunth. Ann. & Mag. Nat. Hist. 1868, i. p. 415. 



A variety of this species from the Upper Amazon is black, 

 the trunk being encircled by about 52 narrow, nearly equidis- 

 tant, white rings. The rings are only one or two scales broad, 

 the narrower and broader being alternately arranged. Tail 

 coloured as the trunk. The white occipital band of the typi- 

 cal specimen is also present in this variety, but is limited to 

 the side of the head, and does not extend across the occipitals. 

 Abdomen with large irregular black cross bands. Ventral 

 shields 148. 



A second variety has 11 pairs of black rings on the trunk, 

 the rings of each pair being separated only by a narrow white 

 line. The interspaces of the ground-colour are much wider 

 than the rings. Ventrals 145. Upper Amazons. 



Geophis lineatus, J). & B. 



= Bhahdosoma trivii^gatuvij Jan, and = Rhahdosoma puncto- 

 vittatumj Jan. 



Specimens from Trinidad have been presented by L. Guppy, 

 Esq. 



Geophis mosstus. 



Head rather broad, short and depressed ; body and tail of 

 moderate length. Eye small. Anterior frontals about one 

 eighth the size of posterior. Vertical as broad as long, 

 six-sided, with the anterior angle rather obtuse, and with 

 the posterior somewhat pointed ; its lateral edges are very 

 short, convergent. Occipitals rounded behind, shorter than 

 the vertical and postfrontals together. Six upper labials, 

 the third and fourth entering the orbit ; the fifth is the 

 largest, and forms a suture with the occipital ; an elongate 

 temporal behind this suture. One postocular. The first pair 

 of lower labials form a suture together ; anterior chin-shields 

 not quite twice as large as posterior. Scales in fifteen rows, 

 smooth. Ventrals 148 ; anal entire ; subcaudals 41. Colora- 

 tion very similar to that of Homalocranium moestum — viz. en- 

 tirely black, with a broad white collar, nearly entirely occupy- 

 ing the occipitals and temple. Lower parts blackish. 



One specimen from the elevated parts of Costa Rica, near 

 Cartago. Total length 6^ inches ; tail 1 inch. 



