192 ON THE FAMILIES OF THE RANIFORM ANURA. 



Tympanum, cavum lympani and eustachian ostia ; toes with web or 



its rudiment, Callula. 



AA. Terminal phalanges simple. 



Ear fully developed ; head not distinct ; membranum tympani con- 

 cealed ; toes free to slightly palmate ; metatarsus with insignifi- 

 cant tubercles, • • Engtstoma. 



Ear developed, membranum tympani concealed ; toes free to partially 



palmate ; metatarsus with two compressed shovel-like tubercles, . Systoma. 



Ear developed, membranum tympani distinct externally ; toes free ; 



metatarsus with insignificant tubercles, Adenomera. 



PHRYNOMANTIS Peters. 

 Brachymerus Smith (name pre-occupied), Zool. S. Africa. 

 P. b i f a s c i a t a Smith. South and East Africa to Zanzibar. 

 P. fuse a Peters, Monatsberichte, Berhn, 18C7, 35. Amboina. s 



CALLULA Gray, 183L 



(Spelled erroneously Ealoula and Calohyla.) Ei/lcedactylus Tschudi, 1838. Plectro- 

 pus Duin. Bibr. Holonectes Peters, 18G3. 



The species of this genus in the author's estimation are — 

 C. picta Dum. Bibr. {Plectropus .) Philippine Islands. 

 C. obscura Giiulher, Kept. Brit. Lidia. Ceylon. 



C. pulchra Gray {Eykedaciyh(s), Cantor. Ceylon, Siam, Burtnah, China. 

 C baleata Muller, Giinther, Cat. B. M. Java. 

 C. sundana Peters, Monatsberichte Berl. Ac. 1867. Borneo. 

 C. conjuncta Peters {Holonectes Pet.), Monatsber. 1863. Steindachner Verb. Bot.. 



Zool. Gess. Wien, 1864. Tab. Philippine Is. 

 C. natatrix Cope, sp. nov. Near Rangoon, Burmah. 



This species differs from the preceding in the complete palmation of its toes, the 

 length of its posterior extremities, and the minuteness of the ostia pharyngea, thus 

 approximating the genus Microhyla, and entirely confirming the position I assigned 

 the latter in the essay in Nat. Hist. Review (1855). 



Head small, muzzle as long as orbit, obtuse, scarcely projecting beyond mouth ; 

 canthus rostralis very obtuse. Fingers slender, free, tips truncate, scarcely dilated, a 

 slight dermal margin. Foot large, one phalange only of longest toe free from web. 

 Metatarsal tubercles minute ; no tarsal fold. When the hind limb is extended, the 

 end of the muzzle falls opposite the middle of the tibia, the whole measuring twice' 

 the length of head and body in all, the longest limb among the Anura. Skin every- 

 where smooth. Tongue oval ; a subgular vesicle in c?. 



