1907.] OP A FROG OF THE GENUS MEGALOPHRYS. 341 



find any foi-amen in the cartilage such as occurs in Pelodytes. 

 There was a slight thinning, however, of limited extent at a point 

 just opposite to the divergence of the two anterior prolongations 

 of the body of the hyoid, and corresponding therefore to the 

 marked foramina shown in the two genera Pelodytes and Pelohates 

 by Dr. Ridewood, whose figures are referred to below, and in 

 Scaphiopus* . If that be so, it would seem to follow that the tract 

 of cartilage lying outside of this is really the I'emains of the 

 hyoidean cornu, and the apparent solidity of the body of the hyoid 

 due to the complete and secondary fusion of this hyoidean cornu 

 with the body of the hyoid. The weak place in the body of the 

 hyoid is, however, so little marked that I hesitate to give to it 

 this morphological importance, and, moreover, it is covered by 



Text-fig. 97. 



Hyoid oi Megalophrj/s nasuta. 

 ep. Cartilaginous epiphysis. I. Ligament representing anterior cornua. 



the attachment of the sterno-hyoideus muscle which lies to the 

 inside of the foramen in Pelodytes punctatus. More likely to 

 correspond to traces of the otherwise missing hyoidean cornu is, I 

 think, a stout ligament shown in my figure (text-fig. 97) which is 

 attached to a slight indentation near to the anterior end of the 

 anterior prolongation of the body of the hyoid. The position, it will 

 be observed, is by no means unsuitable to such an interpi-etation 

 of its nature. Nor would this argument be necessarily at variance 

 with the supposition that the thinning on the body of the hyoid 

 in this frog is the equivalent of the foramen in Pelodytes and 



* Boulenger, P. Z. S. 1899, p. 792. 



