ON THE FAMILIES OE THE RANIFORM ANURA. 205 



orbit equal length muzzle, twice tympanum; sacral diapophj'sis scarcely dilated ; 

 hind limb long, foot short. Above brownish-red, closely black punctate ; anterior 

 and posterior faces femur, tibia below, and band from mouth to groin, black. 



This species is distinguished from the C. geographicum not only by its more 

 ovate muzzle, and the singular distribution of its colors, but by the extraordinary 

 slenderness of its extremities, and breadth and depression of its head ; the diapophy- 

 ses of the sacral vertebra are also less dilated than in the species of this genus and 

 Hypsiboas. 



The heel extends to the nares, and the tarsus is equal in length to the metatarsus 

 and longest toe. Tibia one-half the length from end coccyx to end muzzle, two-thirds 

 longer than coccyx. Web of foot to base penultimate phalange of fourth toe; of hand 

 to same point of longest finger. The thumb phalange is remarkably flat and promi- 

 nent laterally. Tympanum two-thirds orbit, elliptic, erect. Canthus rostralis con- 

 cave, muzzle rather angulate, truncate in profile. Skin of upper surfaces -and of 

 breast entirely smooth. The extremities are colored like the back, the femur most 

 narrowly, none cross-banded, the tibia punctate above. No dark band on loreal 

 region. White below, belly yellow or red ; both lips light margined, the mandible 

 with a brown line within the margin. 



Inches. Lines. 



Length head and body, 14-5 



" hind limb, . . ■ . . . . . . . .2 2 



" femui', 8 



Width cranium at tympanum, 6-75 



Length " posterior margin tympanum, ..... 5'5 



" fore-limb, .......... 9-5 



One spec. No, 320, Mus. Comp. Zoology, Cambridge, from Bahia ; Antonio cle 



Lacerda, donor. 

 Allied to the Hylida3 by the form of the diapophyses of the sacrum, but conforming 



in technical features mostly with the Pelodytidos is the genus. 



GRYPISCUS m. 



Mandible with a series of caducous pleurodont teeth, and a permanent elevated 

 tooth on each side the symphysis. Prefrontal bones fully developed, in contact with 

 each other throughout, and with fronto-parietals. Auditory apparatus well de- 

 veloped ; tongue broad, entire, little free. Vomerine teeth ; no pai-otoid glands, 



The mandibular teeth are obtuse, and scarcely project above the alveolar mar"-in ; 

 their attachment appears to be to the mucous membrane only, on which account they 

 are readily scraped away. 



The affinities of this genus are as yet obscure ; the mandibular teeth and general 



52 



