G. A. BOULENGEE— EEPTILIA. 241 



The following description is taken from the Ruwenzori specimens : — 



Vomerine teeth in two strong, slightly oblique series between the choanae. Head as 

 long as broad, or a little longer than broad ; snout rounded, scarcely projecting, 

 slightly longer than the diameter of the orbit ; canthus rostralis obtuse ; loreal region 

 very oblique and slightly concave; nostril equally distant from the eye and from the tip 

 of the snout, or a little nearer the former ; interorbital space a little narrower than the 

 upper eyelid ; tympanum very distinct, two-thirds to three-fourths the diameter of the 

 eye. Fingers obtusely pointed, first and second equal ; toes slender, obtusely pointed, 

 two-thirds webbed ; subarticular tubercles small ; a small elliptical inner metatarsal 

 tubercle, measuring one-third the length of the inner toe. Tibia as long as or a little 

 longer than the fore limb, as long as the foot ; tibio-tarsal articulation reaching the tip 

 of the snout or beyond. Skin smooth ; a narrow but very prominent glandular dorso- 

 lateral fold from the upper eyelid to the sacral region. Greyish or olive-brown above, 

 with more or less distinct darker spots ; a broad, light, dark-edged vertebral band some- 

 times present; a dark streak from the end of the snout, through the nostril, to the eye ; 

 a dark temporal spot ; a light streak from below the eye to the angle of the mouth ; 

 limbs with dark cross-bands ; lower parts white, throat with brownish marblings. 



The largest specimen measures 64 mm. from snout to vent, 



Rana nutfi is very nearly related to B. angolensis Bocage. 



Two female specimens, showing variations in the markings, are figured on 

 Plate VIII. figs. 1 & 2. 



EEPTILIA. 



The species of Lizards obtained on Euwenzori by Mr. Woosnam are Agama atricollis, 

 A. Smith, Lacerta jacksonii Blgr., Mabuia maculilabris Hallow., Mabuia striata Peters, 

 and the undescribed Lygosoma for which I proposed the name L. meleagris. This is 

 here redescribed and figured, and I have appended notes on the specimen of the little- 

 known Lacerta jacksoni. 



Chameleons are represented by Chamceleon senegalensis Daud. {loevigatus Gray) and 

 C. ellioti Gthr., obtained at the foot of the mountain (5000-6000 feet) by Mr. G. F. 

 Scott Elliot ; C. johnstoni Blgr., and C. xenorhinus Blgr., two remarkable forms 

 discovered by Sir H. H. Johnston, and of which further examples were collected 

 during the Expedition ; and a small species, C. rudis Blgr., of which a female had 

 been previously obtained by Sir H. H. Johnston, but which could not be properly 

 understood until the male was discovered by Mr. Woosnam and his party. 



Of Snakes, Leptodira hotamboeia Laur. and Elapechis guentheri Bocage were brought 

 home from the foot of Euwenzori by Mr. G. F. Scott Elliot ; Chlorophis emini Gthr. 



VOL. XIX. — ^PAET III. No. 33. — December, 1909. 2 l 



