66 BATRACHIA. 



the mouth. Its diameter corresponds nearly to the radius of the eye. 

 The mouth, as may be expected from the size of the head, is very 

 large. The tongue is very much developed, spear-shaped, narrowest 

 anteriorly. Its posterior bifurcation is very conspicuous, the organ, 

 itself, being free posteriorly, for more than half of its entire length. 

 The maxillary teeth are very minute. The inner nostrils are large, 

 transversely elongated, reaching almost the branches of the maxillary. 

 The vomerine teeth constitute two stout, elongated, or subtriangular 

 groups, obliquely situated between and behind the inner nostrils, 

 leaving an appreciable space between the inner edge of the latter and 

 their anterior extremity. The openings of the Eustachian tubes are 

 quite large, though much smaller than the inner nostrils, and either 

 subtriangular in shape or longitudinally oblong or elliptical. 



The body is elongated, broader than deep, and tapering posteriorly, 

 as in Rana and Leptodactylus. The limbs are very much developed 

 and stoutish. The anterior ones, when brought backwards alongside 

 the body, reach almost the coccyx with the extremity of the fingers. 

 The palm of the hand is smooth, and provided with one, rather large, 

 horny disk at the base of the inner finger. The fingers themselves 

 are subdepressed, entirely free, and provided with large tubercles 

 under their articulations. The first is longer than the second, which 

 is shorter than the fourth. Their tips are but slightly expanded. 

 The hind limbs are longer than the body by the whole length of the 

 foot. The tarsus has no membranous fold or horny ridge along its 

 inner edge. The soles of the feet are perfectly smooth ; there is but one 

 developed metatarsal tubercle, at the base of the inner toe. Tubercles 

 may be observed under each articulation, and the dilatations of their 

 extremities likewise, are but little developed. The rudiment of a 

 membrane is observed at the base of all the toes. 



The skin is smooth all over, except on the inferior and posterior 

 surfaces of the thighs, which are minutely glandulous. 



The ground color is greenish-brown, the green predominating upon 

 the sides and the limbs. There is a slender dorsal line extending from 

 the head to the posterior part of the body, and a similar one along the 

 limbs. The sides of the abdomen, head and legs, are sprinkled over 

 with small blackish spots, surrounded with bluish-white on the abdo- 

 men. The fingers and toes are green and yellow. Beneath, the color- 

 ation is of a uniform dull-brown. 



