10 L. G. ANDERSSON, SOME NEW SPECIES OF SNAKES. 



The new species, to which I adopt the name »carinatus* 

 on the ground of the distinct keels on the ventrals, seems to 

 come nearest to Chlorophis hetcrodermus Hallow., from which 

 it differs only by above mentioned characters. For the sake 

 of completeness I give, however, in the following a brief 

 diagnosis of the new species. 



Maxillary teeth about 40, increasing in size behind and 

 forming an uninterrupted series; mandibular teeth numerous, 

 sligthly decreasing in size behind; all teeth solid. Head 

 elongate, distinct from neck. Eye large, V^ of its distance 

 to the tip of the snout; pupil round. Rostral broader than 

 deep, well visible from above. Internasals as long as or 

 slightly shorter than the preefrontals. Frontal pentagonal, 

 twice as broad in front as behind, as long as or slightly 

 shorter than its distance to the tip of the snout, shorter 

 than the parietals, about as large as the supraoculars. Nostril 

 lateral, large, between two nasalso Loreal longer than deep. 

 One praeocular, nearly reaching the frontal. Two postoculars 

 (one on the one side of a specimen and four on the one of an- 

 other). Temporals 2 + 2 or 1 + 2 (on the sraallest specimen 

 the temporals are 2 + 3 on one side, 3 + 2 on the other). Nine 

 or ten upper labials, fourth, fifth, and sixth or fifth, sixth, 

 and seventh entering the eye. Five lower labials in contact 

 with the anterior chin-shields, which are longer than the 

 posterior. Body elongate, cylindrical. Scales smooth, in 13 

 rows with apical pits, disposed somewhat oblique on the an- 

 terior part of the body. The vertebral row not enlarged, 

 the outermost row slightly larger than the other. Ventrals 

 with a distinct keel and a very small notch on each side; 

 146 — 162 in number. Anal entire. Tail long, tapering in a 

 long point; subcaudals 83 — 97 pairs, without keels and not- 

 ches. Olive or green above (blue when the epidermis is 

 löst); the young with dark cross bars which disappear more 

 or less with age. Yellowish green beneath. 



Four of the specimens belong to the collections of Messrs. 

 Knutson & Valdau, the fifth also is from Cameroon, received 

 by Mr. Knöppel in 1886. 



