12 



MR. F. E. BEDDARD ON THE 



[Jan. 14,, 



therefore lies completely on the expanded sacral transverse 

 process. Anteriorly fibres of the — as I presume — ilio-lumbaris 

 muscles are inserted upon the cartilaginous plate, and quite 

 anteriorly it is connected, though feebly, round the edge of the 

 transverse process, with the expanded end of the ilium. I imagine 

 that this cartilage belongs to the ilium, and that it is in con- 

 sequence related to it as the suprascapula is to the scapula. "We 

 have, in fact, in this frog an exaggeration of the grooving which 

 the anterior end of the ilium of other forms shows at its line of 

 articulation with the sacral vertebra. It is, moreover, interesting 

 to observe that we find in this frog a kind of foreshadowing of 

 the relations which the ilia bear to the sacrum in the higher 

 Sauropsida — especially birds — where the ilia are not merely 

 attached to, but cover, the sacral verfcebrse. 



§ Hyoid. 



This cartilaginous complex presents some peculiarities of form 

 in Brevicejjs. Of these the most salient are shown in the accom- 

 panying figure (text-fig, 2) illustrating also some of the hyoid 



" Text-fig. 2. 



ILcthd. StJi. 



Anterior cornua of hj'oid and part of hyoidean musculature of Breviceps. 



h. Basihyal plate. /;•. Anterior cornu of hyoid. h^^. Lateral process of basihyal. 

 H.abd. Hyoabdominal muscle. Ji.c/. ilyoglossus. P.Ji. Petrohyoideus. Sh. 

 Subhyoideus. Sin. Submaxillaris. St.h. Two divisions of sternohj^oideus. 



muscles. It will be thei-e seen that the anterior cornua of the 

 hyoid are particularly stout and strong which is correlated, 



