from the Ogowe River and Old Calabar. 265 



central occipital. The posterior occipitals are fringed by 

 some smaller marginal scutes. Two large supraoculars on 

 each side. Seven or eight narrow upper labials, of which 

 the penultimate is the largest. Four chin-shields on one 

 side, five on the other. Temporal scales small, strongly- 

 keeled. 



Ear very open, vertically long. Collar more distinct in 

 front of the shoulder-joint, and nearly obsolete across the 

 chest. Dorsal scales in eight, ventral in ten, longitudinal 

 series. Prseanal region covered by keeled scales, in size and 

 shape scarcely differing from those preceding them. About 

 twelve femoral pores. All the caudal scales strongly keeled. 



The fore limb pressed backwards does not reach the groin ; 

 the hind limb carried forwards extends to the ear. Thigh 

 finely granular behind. 



The upper parts are brown, or, after the removal of the 

 epidermis, green iridescent. Back anteriorly with a black 

 longitudinal band on each side of the median line, the two 

 bands coalescent further behind. An indistinct greenish band 

 along each side of the neck. Lower parts whitish. 



milliiu. 



Distance of snout from vent 45 



Length of tail 110 



Distance of snout from ear 12 



Length of fore limb 20 



Length of hind limb 30 



Length of fourth toe (measured from its junc- 

 tion with the fifth) 12 



I have given a full description of this lizard, as the specimen 

 found by Miss Kingsley at Lambarene seems to be only the 

 second known to exist in collections. Its specific identity 

 with Tachydromus Fordii of Hallowell might be questioned, 

 as this author has described the specimen in the museum of 

 the Philadelphia Academy as possessing only six rows of 

 ventral scales ; also the scutellation of the preeanal region is 

 differently described. However, as there is a great agree- 

 ment in other respects between the two specimens, and the 

 locality (Gaboon) as given by Hallowell points likewise to a 

 specific identity, I adopt the name given by the latter author. 



Dipsadoboa assimilis. 



Dipsadoboa assimilis, Matschie, SB. Ges. naturf. Fr. Berl. 1893, p. 173 

 (Togoland) ; Bocage, Jorn. Sc. Lisb. iv. 1895, p. 17. 



The specimen obtained at Lambarene agrees better with 

 D. assimilis than with D. unicolor with regard to the number 

 and disposition of the labial shields. 



