1890.] BATRACHIAN COLLECTION IN THE BRITISH MUSEUM. 327 



extremity of each ramus mandibuli. A denticulated transverse der- 

 mal ridge in front of the oesophagus. Ear hidden. Fingers free ; 

 toes webbed at the base, the tips slightk dilated ; outer metatarsals 

 bound together. No prsecoracoid ; sternum cartilaginous. Trans- 

 verse processes of sacral vertebra moderately dilated. 



Genyophryne may be regarded as the type of a new family of 

 Firmisternia, Genyophrynidte, characterized by absence of maxillary 

 teeth and presence of mandibular teeth. In all but the latter cha- 

 racter it agrees with the Engystomatidce. 



Genyophryne thomsoni. (Plate XXV. fig. 1.) 



Very similar in appearance to Rhombophryne testudo, Bttg. Head 

 large and much depressed ; eyes small and wide apart. First finger 

 shortest, third much longer than second or fourth. Inner metatarsal 

 tubercle indistinct. Heel with a triangular dermal process. Skin 

 smooth. Pinkish brown above, variegated with blackish ; temples 

 whitish ; a light line on each side from the eye along the back ; 

 hinder side of thighs and lower surface of tarsus black. 



From snoui to vent 32 millim. 



A single specimen was obtained by Mr. Basil Thomson on Sudest 

 Island, between New Guinea and the Louisiade Archij)elago, It is 

 unfortunately in very bad condition. 



Ceratophrys calcarata. (Plate XXVI.) 



Vomerine teeth in two very small, very indistinct groups between 

 the choanse. Head large, bony ; a supratemporal bony ridge ; 

 nostril nearer the eye than the tip of the snout ; tympanum perfectly 

 distinct, a little smaller than the eye ; interorbital space concave ; 

 upper eyelid prolonged into a small " horn." First finger longer 

 than second ; toes hardly half webbed ; inner metatarsal tubercle 

 very large, shovel-shaped, sharp-edged ; a rather indistinct tarsal 

 fold. The tarso-uieiatarsal articulation reaches the tympanum. 

 Upper parts with small very prominent tubercles, the largest of 

 which are ribbed. No dorsal shield. Dark olive above, with paler 

 symmetrical markings; an arrow-headed green band on the back, 

 widening and bifurcating between the eyes ; lower parts with a few 

 brown spots ; metatarsal spur black. 



From snout to vent 70 millim. 



A single specimen, a female, obtained by Hr. Diimel in Colombia, 

 was in the lace Dr. J. G. Fischer's collection, recently acquired by 

 the Trustees of the British Museum. 



Paludicola fischeri. (Plate XXV. fig. 2.) 



Tongue elliptic, entire. Vomerine teeth none. Snout rounded, 

 as long as the diameter of the orbit ; interorbital space as broad as 

 the upper eyelid ; tympanum rather indistinct, about half the diameter 

 of the eye. Fingers slender, first not extending quite as far as second ; 

 toes slender, fringed, with a shght rudiment of web ; subarticular 

 tubercles moderately large but very prominent ; a small tarsal tubercle ; 



