182 REPTILES. 



in fifteen rows, those of the vertebral row not larger ; subcaudals 

 two-rowed ; maxillary teeth becoming gradually larger behind ; 

 the two hindermost largest, compressed, smooth. 



1. Hemidipsas ocellata. 



YelloMish grey, with large rounded brown spots. 



a. Adult. Sine patria. From the Collection of the Zoological 

 Society. 



Description of the specimen. — Habit and coloration similar 

 to Leptodeira annulata. Body moderately compressed ; ventral 

 shields bent on the sides ; head compressed, with much-swollen 

 temples, flat crown, and rather broad muzzle, rounded in front ; 

 eye moderate, pupil elliptical. Rostral broader than high, with 

 a right angle above, and raised on the surface of forehead ; all 

 the frontal shields nearly equal in size, posterior ones broader, but 

 shorter ; vertical five-sided, longer than broad, with rather con- 

 vergent lateral edges, and a right angle behind ; occipitals mo- 

 derate, rounded on the sides and behind ; two posterior oculars; 

 two shields forming the front edge of orbit ; one upper small 

 one, square, not reaching the surface of crown, and one oblong 

 larger one, which may be considered as a loreal shield united 

 with a second ante-ocular ; one large oblong nasal, pierced by 

 the nostril ; seven upper labials, third and fourth forming the 

 lower edge of eye ; about seven scale-like temporal shields, two 

 of which are in contact with the oculars ; first pair of lower la- 

 bials forming a suture behind the terminal one, four pairs of chin- 

 shields behind. Scales as above mentioned, not much imbricate, 

 rhombic ; anal entire. Teeth as described. Yellowish grey, with 

 a dorsal series of large, rounded, brown, lighter-edged spots ; on 

 the posterior part of body the spots, bemg divided into two, form 

 two alternate series ; on the sides near the belly a row of much 

 smaller, rather indistinct, brown spots ; head nearly uniform 

 brownish grey; belly uniform yellowish. Length of cleft of 

 mouth i" ; length of tail 6" ; total length 24". 



The species probably comes from Tropical America. 



10. DiPSADOBOA, Gunther. 



Body and tail compressed, slender ; head depressed, triangular, 

 broad behind, very distinct from neck ; one loreal, one anterior, 

 tvro or three posterior oculars. Scales moderate, rather short, 

 rhombic, in seventeen or nineteen rows, smooth, those of the ver- 

 tebral row larger; subcaudals entire. Pupil elliptical, erect; 

 nostril moderate, between two shields. Posterior maxillary tooth 

 longest, grooved. Central America ; West Africa. 



