On a new Frog from British Hast Africa. 515 
end of the snout; vertebre 28+59; air-bladder not cellular. 
—South America. 
Scleropages, Gthr.—Mouth large; vomer, palatines, ptery- 
goids, and glossohyal toothed ; mandibular barbels ;_branchio- 
stegal rays 15-17; body compressed, with trenchant abdomen ; 
coracoids forming a ventral keel; dorsal fin short; ventral 
fins nearly equally distant from end of snout and caudal fin ; 
vertebre 29-31+80; air-bladder not cellular.—Australia 
and Malay Archipelago. 
Arapaima, J, Mill—Mouth rather large; vomer, pala- 
tines, pterygoids, and glossohyal toothed; branchiostegal 
rays 16; belly rounded; dorsal fin rather long; ventral 
fins equidistant from head and caudal fin; vertebree 37-38+ 
41-42 ; air-bladder cellular.—South America. 
Heterotis, Hhrenb.—Mouth moderate ; branchiostegal rays 
7; belly rounded; dorsal fin rather long; ventral fins nearer 
end of snout than caudal fin; vertebrae 27+42-43; air- 
bladder cellular; fourth branchial arch with an accessory 
breathing-organ.— Africa. 
Dapedoglossus, Cope, from the Hocene of Wyoming, 
appears to be nearest to Scleropages, and Brychetus, A. 8. 
Woodward, from the Hocene (London Clay) of Sheppey, 
Kent, to Arapaima, so far as the state of preservation of 
these fossils enables us to form an opinion *. 
LXIV.—Description of anew Frog from British East Africa. 
By G. A. BoULENGER, F.R.S. 
Rana stenocephala. 
Vomerine teeth in two short oblique series commencing 
from the inner front edges of the choane. Head nearly once 
and a half as long as broad; snout acutely pointed, longer 
than the diameter of the orbit, strongly projecting beyond 
the mouth; canthus rostralis feebly marked; loreal region 
concave ; nostril midway between the eye and the end of the 
snout; interorbital space as broad as the upper eyelid; 
tympanum distinct, two thirds or three fourths the diameter 
of the eye. Fingers moderate, obtusely pointed, first not 
* KE. D. Cope, Vert. Tert. Form. West, i. p. 68 (1884); A.S. Wood- 
ward, Cat. Foss. Fish. iv. p. 74 (1901). ine 
