4. Buro. 291 



hind limb being carried forwards along the body, the tarso-metatarsal 

 articulation reaches the eye. Upper surfaces with flat, scarcely pro- 

 minent warts ; parotoids large, depressed, descending to the arm- 

 pit; lower surfaces nearly smooth. Brown above ; greyish brown 

 beneath, with round light spots ; lower lip bordered with light 

 spots. 

 Guiana. 



a. 2 [from snout to vent 177 miUim.J. Demerara Falls. 



6. Hgr. Demerara Falls. 



12. Bufo glaberrimus. 

 Bufo glaberrimus, Giinth. Proa. Zool. Soc. 1$68, p. 483, pi. 37. f. 2. 



Crown without bony ridges ; snout short, truneated, with angular 

 canthus rostralis ; loreal region vertical ; interorbital space as broad 

 as the upper eyelid ; tympanum very distinct, about half the width 

 of the eye. First finger extending beyond second ; toes nearly 

 half webbed, with simple subartioular tubercles ; two slightly 

 developed metatarsal tubercles ; an indistinct tarsal fold. The hind 

 limb being carried forwards along the body, the tarso-metatarsal 

 articulation reaches between the eye and the nostril. Skin per- 

 fectly smooth, with a few slight tubercles on the sides of the body ; 

 parotoids large, ovate, very prominent. Upper parts brownish 

 black ; the sides black ; in one specimen a beautiful rose-coloured 

 spot in the groin, and smaller spots of the same colour on the hinder 

 part of the thigh ; lower parts blackish, with white dots. Male 

 with a subgular vocal sac. 



OWombia; Ecuador. 



13. Bufo cseruleostictus. (Plate XXI. fig. 1.) 

 Bufo cseruleostictus, Giinth. Proc. Zool. Soc. 1859, p. 415. 



Crown with but a slight indication of bony ridges ; snout short, 

 rounded, with angular canthus rostralis ; interorbital space concave, 

 broader than the upper eyelid ; tympanum hidden. First finger 

 extending slightly beyond second ; toes webbed at the base, with 

 simple subartioular tubercles ; two feebly developed metatarsal 

 tubercles ; a tarsal fold. Limbs rather slender. The hind limb 

 being carried forwards along the body, the tarso-metatarsal articu- 

 lation reaches between the eye and the tip of the snout. Skin nearly 

 smooth, or with small flat tubercles ; parotoids elliptic, elongate. 

 Uniform dark brown above, greyish brown beneath. (Male with a 

 subgular vocal sac.) 



Ecuador. 



a,b. ? . W. Ecuador. Mr. Eraser [C.]. (Types.) 



tr2 



