TROPIDOLEPIS UNDULATUS. 75 



longitudinally on the back, but obliquely on the flanks. The abdomen is broad, 

 flattened, rounded at the sides, and covered with rhomboidal, reticulated, and 

 imbricated scales, each scale terminating posteriorly in a point. The scales on 

 the throat and anterior part of the chest are frequently notched behind, instead of 

 ending in a point; those under the chin are very small. The tail is long, cylin- 

 drical, and covered with sharp, elongated or imbricated scales, pentagonal or 

 triangular, with their apices rounded, and are verticillated or arranged in circular 

 rows, which renders the tail rough to the touch. The vent is semicircular, 

 transverse, and bordered before and behind with minute scales. 



The anterior extremities are rather large and rounded, covered above with 

 scales similar to those on the back, but smaller and smooth below. There are 

 five delicate fingers, furnished each with a very small, short and curved nail. 

 The posterior extremities are nearly twice the size of the anterior, and are 

 covered with similar scales, with a range of sixteen or eighteen pores on the 

 inferior surface of the thigh; behind these are numerous small scales that make a 

 sort of ridge. There are five toes, long, slender, and scaled to the root of the 

 nails, which are short and curved. 



Colour. The head is dark broAvn above, with a black bar extending from 

 orbit to orbit; behind this is a dusky white bar of similar extent. The neck 

 above is dark grey; behind the tympanum are two or three scales, with their 

 margins of bright red. The lower jaw is silver-grey; the throat black, with a 

 broad green blotch ascending, to be visible on the side of the neck, sometimes 

 interrupted in the mesial fine. 



The body is pepper-and-salt grey above, with five or six transverse black 

 bands, not of equal breadth in all parts, and having their posterior borders 

 marked with white blotches, which frequently become continuous, so that their 

 posterior margins appear tipped with a white edge. The abdomen is silver- 

 grey, marked with small, oblong, black spots; these are so disposed near the 

 centre as to form an interrupted line, which is most distinct between the thighs. 



