244 MR. A. W. E. O'SHAUGHNESSY ON [Feb. 1, 



species is unrepresented in the British Museum, as Bibron's suppo- 

 sition of its identity with L. carinatus appears to have been incorrect, 

 although very confidently expressed. The description indicates, 

 however, a cephalic scutellation totally different from the present 

 species, a very much higher crest, and other conspicuous points 

 of difference. The scales on the top of the muzzle in the present 

 species are quite large, only about 10 in number, and not keeled, 

 instead of the 30 very small keeled ones mentioned by Bibron. 



23. Leiocephalus trachycephalus. 



Leiocephalus trachycephalus, Dum. Cat. Meth. Rept.1851, p. 70; 

 Arch. Mus. viii. p. 539, pi. 23. fig. 1. 



One specimen from Sarayacu, Ecuador. There are now numerous 

 specimens in the British Museum which I have recognized as of 

 this species ; the figure of the entire lizard, however, evidently a very 

 bad one, shows little resemblance to them. 



24. HoPLOCERCXJS ANNULARIS, sp. u. (Plate XXV. fig. 2.) 



Scales on snout convex, granular, similar and nearly uniform on 

 the other parts of the head, excepting the supraorbital spaces, where 

 they are larger and rounded or polygonal. The upper surface of 

 the' body is covered with a groundwork of small granular scales, 

 with tubercles in several complete longitudinal rows from the nape 

 to the root of the tail, more closely set along the median line of the 

 back ; series of tubercles also descend vertically on the sides. Scales 

 of the belly rather small, but regularly tessellated. Supralabials 

 nine. Infralabials ten. Limbs strongly tubercular. Tail longer 

 than head and body, cylindrical, and surrounded at regular and 

 rather close intervals throughout its entire length by complete rings 

 of projecting tubercles or spinous scales. A series of two or three 

 very large femoral pores on each thigh. Teeth trilobate. 



Brown, with transverse dark bars on the back. An oblique yellow 

 black-bordered stripe in front of the fore limb. A large yellow spot 

 on the upperside of the thigh. 



millinu 



Total length 132 



Length of head to ear-opening 16 



Distance from tip of snout to fore limb 27 



., . „ vent 59 



Length of fore limb 24 



„ third and fourth fingers .8 



„ hind limb 40 



„ fourth toe ) 4 



A single specimen, evidently young, as shown by an external 

 groove indicating imperfect symphysis of the lower jaw, was ob- 

 tained from Canelos. It is a very interesting form, which, on 

 account of the total dissimilarity of its tail, might have been sepa- 

 rated generically from Hoplocercus spinosus. I can, however, detect 

 no other grounds for such separation ; and as 1 have lately found a 



