150 ENGTSXOMATID^. 



Habit slender ; tibio-tarsal articulation not 

 reaching beyond the posterior corner of 

 tlio eye ; skin smooth 5. variiis, p. 152. 



Habit slender ; tibio-tarsal articulation 



marking the front of the orbit 6. Imir/irostris, p. 153. 



Habit slender ; tibio-tarsal articulation 

 marking the eye ; toes half webbed ; skin 

 warty !>. cmciger, p. 154. 



Habit slender; tibio-tarsal articulation 

 marking the eye ; toes nearly entirely 

 webbed; skin smooth 10. eler/ans, p. 155. 



Habit very slender ; tibio-tarsal articulation 

 reaching beyond the eye; toes half 

 webbed ; skin smooth 11. hibronii, p. 155. 



II. First toe quite indistinct. 

 Head as broad as long ; yellow and brown 



above 7. JIavescens, p. 153. 



Head a little longer than broad ; black and 



green al)ove -^ ■ ■ ■/- .^,. . y. . 8. i:)nlcher, p. 154. 



' 1. PhryniDouc nigrioanc . 

 y .M I Phryniscus nigricans, Gunth. Cat, p. 43. 



/ft^trf* L^Cf'f^*^ J Phryniscus nisTicans, Wmjm. No» , Aot i ISSd) ]] ■ SUd ; Dtivi. ^- Bibr. 

 C '^ / p. 723,; Bell, Zool. Beagle, p. 49, pi. 20. f. 3-5; D'Orbiymj, Voy. 



Amer. mcv., Rept. p. 11, pi. 15. f. 1-4; Esjxida, Viaj. Pact/., Vert, 

 p. 115, pi. 1. f. 9. 

 Cliaunus formosus, Tsclmdi, Batr, p. 87. 

 ■ r* PhTynioouc gtittatuD) rhiUppi, Aroh , ft Natupff , IBfil; p . . ^OOt 



Habit stout. Head broader than long; snout short, rounded; 

 interorbital space broader than the upper eyelid. Fore liml) shorter 

 than the trunk ; fingers short, first a little shorter than second ; 

 metacarpal and subarticular tubercles well developed. Hind limb 

 short, the tibio-tarsal articulation reaching hardly the shoulder; 

 toes short, one-third webbed, with prominent double subarticular 

 tubercles ; two metatarsal tubercles. Upper surfaces covered with 

 wai'ts. Black, variously spotted with white. Male with a subgular 

 vocal sac. 



Uruguay, Euenos Ayres. 



a-c. S $ . Maldonado. C. Darwin, Esq. [P.]. 



d, c? . Moute Video. 



e. $ . Buenos Ayres. E. White [C.J. 



■^- »• ^.,V£,^^™°- Si.A.S„i,h[P.], 



2. P hi'ynioottB proboscideus. (Plate XIII. fig. 1 .) 

 Habit slender. Head as long as broad, its length contained twice 

 and a half or twice and one fourth in the length of the trunk; 

 snout much produced beyond the lip, truncate ; loreal region con- 

 cave ; nostril near the tip of the snout ; the diameter of tlio eye 

 equals its distance from the nostril; interorbital space a little 



