302 MR. F. E, BEDDARD ON THE [Nov. 26, 



ordinary ari-angement is for the bronchial cartilages to be straight 

 bars not fused and contoi^ted to form " a fantastically shaped W." 

 Tn all of the three types, however, figured by Wilder, the cricoid 

 cartilage or " annulus " is represented as ending medianly in a 

 pharyngeal piocess closely applied to the ventral wall of the 

 oesophagus. This is termed by Haslam the " spine of cricoid 

 cartilage." It might therefore be inferred that this spine was 

 characteristic of the genus Eana*. However, this is not the case ; 

 foi- in Rana tigrina there is the barest rudiment of this process. 

 Otherwise there are no great differences between that species and 

 " type II "^of Rana as described by Wilder. 



Text-fiij. 240. 





Laryngeal cartilage and adjacent structure of MegaJophrijs nasuta. 

 Lettering as in text-fig. 238. 



In the figure of the laryngeal cartilages of Rana escidenta given 

 in Haslam's translation of Ecker's work t, a stifi:' membrane is 

 represented as filling up the interspace of the cricoid cartilage. 

 This I find strongly developed in Rana tigrina. I mention this 

 point with some emphasis, since in Megalo2}hrys nasuta it is 

 represented by an extremely delicate membi'ane. The two 

 principal features that T have noticed in the structure of the 

 larynx of Megalophrys nasuta which differentiate it from that of 



* It is very long in Hana guppyi. t P. 313, fig. 204 M. 



