200 IGUANIDJE. 



Head longer than broad ; loreal region perpendicular ; nostril 

 below the canthus rostralis, a little nearer the orbit than the end of 

 the snont ; tympanum a little larger than the eye-opening, without 

 marginal denticulation. Upper head-scales very small, convex, 

 obtusely keeled ; occipital scarcely enlarged. Sides and lower 

 surface of neck strongly plicate. Body slightly depressed, strongly 

 plicate on the sides. Dorsal scales small, irregular, obtusely keeled, 

 juxtaposed, intermixed with larger, obtusely keeled or spinose tu- 

 bercles forming irregular transverse series ; lateral scales minute, 

 granular, intermixed with small tubercles ; ventral scales squarish, 

 smooth, larger than dorsals. Gular scales granular. Limbs short ; 

 the adpressed hind limb reaches the axilla; some large spinose 

 tubercles on the femur and tibia ; digits short. Three to five 

 femoral pores on each side. Tail about as long as the distance be- 

 tween the end of the snout and the fore limb, flat, as broad as the 

 bodj', ending in a point ; the scales on its upper surface of unequal 

 size, rugose, keeled and spinose, with a series of larger ones along 

 the middle ; largest of all, forming long curved spines, are the scales 

 of the outer series on each side ; infracaudal scales small, smooth, 

 like the ventrals. Brown above, spotted with blackish and yel- 

 lowish ; an oblique yellowish band on the shoulder ; lower surfaces 

 whitish ; middle of belly and a JL-shaped figure on the throat 

 black. 



millim. millim. 



Total length 137 Fore limb 34 



Head 26 Hind limb 47 



Width of head .... 18 Tail 44 



Body 67 



Brazil. 



a, b. Ad. stuffed. St. Paul. 



c. Skin. S. America. Sir A. Smith [P.]. 



d. (S . S. America. 



2. Hoplocercus annularis. 



Hoplocercus annularis, O'Shaughn. Proc. Zool. Soc. 1881, p. 244, 

 pi. XXV. fig. 2, 



Upper head-scales small, convex, smooth, a little enlarged and 

 flat on supraocular regions ; no distinct occipital. Dorsal and 

 lateral scales finely granular, intermixed with obtusely keeled sub- 

 oval tubercles, forming longitudinal series on the back and irregular 

 vertical series down the flanks. Limbs with large conical tubercles ; 

 the adpressed hind limb reaches the ear ; digits moderately elongate. 

 Two femoral pores on each side. Tail a little longer than head and 

 body, cylindrical, regularly encircled by whorls of large spinose 



