52 MB. G. A. BOULENGEE ON THE KEPTILES 



small conical protuberance, projecting slightly through the delicate envelope of the 

 egg, and e^ddently used to perforate that envelope, as is shown by one of the specimens 

 (PI. X. fig. e). 



4. RAjVA KKEFFTII. 

 Rana krefftii, Bouleng. Cat. Batr. Ecaud. p. 64, pi. iii. fig. 3. 



The vomerine teeth form two oblique oval groups in the middle between the choanse, 

 each group being equally distant from the latter and from its fellow. The Eustachian 

 tubes are a little larger than the moderate-sized choanse. 



The general habit is slender, and resembles that of Emm erytkrcea. The head is 

 triangular, slightly longer than broad, depressed, with obtusely pointed snout; the 

 latter, which projects a little beyond the mouth, is a little longer than the diameter of 

 the orbit ; the nostril is a little nearer the tip of the snout than the eye ; the canthus 

 rostralis is straight and angular, and the loreal region a little oblique and strongly 

 concave. The eye is rather large ; the interorbital space is plane, and as broad as the 

 upper eyelid. The tympanum is very distinct, circular, and equals two thirds the size 

 of the eye. 



If stretched down along the body, the fore limb reaches beyond the vent. The 

 fingers are slender, with the tips dilated into small, regular, oval disks ; the second and 

 third fingers have a distinct dermal border along the inner side ; the inner finger is a 

 little shorter than the third, a little longer than the fourth, and longer than the second ; 

 the subarticular tubercles are strong and oval. There are three subequal oval meta- 

 carpal tubercles. When the hind limb is carried forward along the body, the tibio- 

 tarsal articulation reaches between the eye and the nostril. The toes are slender, 

 moderately long, nearly entirely webbed, with the tips dilated into rather large oval 

 disks ; the subarticular tubercles are moderately large, oval, prominent. A small oval 

 inner and a small rounded outer metatarsal tubercle are present. There is no tarsal 

 fold. 



The skin is smooth, except on the hinder side of the thighs, where it is granulate. 

 A broad, scarcely prominent, glandular fold runs along each side, beginning from the 

 eye, and another, less distinct, from below the eye to the shoulder. On the hind limbs, 

 and most distinctly on the tibia, are narrow raised longitudinal lines. 



The upper surfaces are olive or chestnut-brown, without any spots ; the sides of the 

 head, limited by the canthus rostralis, and of the body, limited by the lateral fold, black. 

 A whitish band extends from below the nostril, on the lip, to the shoulder, becoming 

 most marked under the eye. The lower surfaces, as well as the hinder side of the 

 thighs, are white (or yellow), largely marbled with blackish brown. 



The- male is distinguished by the presence of two external gular vocal sacs, and a 

 large elliptic gland on the anterior face of the arm. 



