EAST AFRICAN REPTILES AND AMPHIBIANS 



43 



than in tarodanus where they are smaller and less strongly keeled. 

 (4) No praeanal pores as against eight praeanal pores, but the types 

 are of opposite sexes, (5) Free edges of lateral ventral scales mark- 

 edly instead of slightly serrate. (6) Paired digital lamellae are as 

 follows : 



After pointing out the similarity of the nasals, labials, and chin- 

 shields, and remarking that they are alike in general bodily propor- 

 tions except that tanganicus is slightly larger, Mr. Parker continued : 



I conclude that the two beasts are not conspecific. We have 10 other speci- 

 mens of H. barodanus and all of them agree quite well with the type; none have 

 the patch of small granules on the top of the snout and all have the smaller 

 dorsal tubercles and the relatively longer fifth toe. 



Description. — Head oviform; snout a trifle longer than the distance 

 between the eye and the ear opening, one and three-quarters times the 

 diameter of the orbit; forehead concave; ear opening vertically oval, 

 its vertical diameter about half that of the orbit, two lobules pro- 

 jecting from its anterior edge. Body stout, limbs relatively short. 

 Digits short, moderately dilated, free, the inner well developed, 5 

 lamellae under the inner digit, 7 under the third, 8 under the fourth, 

 6 under the fifth; there are 5 lamellae beneath the first and fifth toes 

 and 7 under the three median ones. Can thai region with enlarged 

 and sharply keeled tubercles gradually becoming smaller toward 

 the loreal region, which is covered with granules; concavity of fore- 

 head Uned with very small granules similar to those covering the 

 crown and postorbital region but on both the latter areas are scattered 

 numerous enlarged, conical, keeled tubercles; rostral rather tetragonal, 

 its depth rather more than two-thirds its width, a median cleft above. 

 Nostril pierced between the rostral and four scales with or without 

 the first labial barely entering, 8 (right) or 9 (left) upper and 8 lower 

 labials; symphysial large, triangular, twice as long as the adjacent 

 labials; innermost pair of the two pairs of chin shields largest and in 

 contact behind the symphysial. Upper parts with minute granules 

 intermixed with very large, trihedral, strongly keeled tubercles form- 

 ing 18 or 20 more or less regular longitudinal series, the largest 

 tubercles a little broader than long; ventral scales small, smooth, 

 roundish, imbricate; a more or less regular but interrupted line of 

 enlarged round tubercles borders the belly laterally. Tail swollen, 

 58528—29 4 



