54 



MR. F. E. BEDDAED ON THE ANATOMY 



[Jan. 15, 



In Tiliqua this second branchial arch is more extensive, as it 

 appears, than in Zonurus, and Ues obliquely across the first 

 branchial arch, though beneath it. Tlie latter arch ends in a 

 curled piece of cartilage which is directed backwai-ds and overlaps 

 the third post-mandibular arcli. But tlie position varies according 

 to the degree of distortion of the muscles of the neck of the reptile. 



Text-fia-. 15. 



BnZ- 



Br. 2 



Tiliqua scincoides, head and neck. 



Dissected to sbow three postraandibular visceral arches in situ. 



To the left the isolated extremities of the same arches in another individual. 



Br. 1. First branchial arch; Sr.2. Second branchial arch ; S. Hyoid arch. 



Towards the lower end of the bar is a triangular, projecting, 

 "snag" (not visible in one of two examples dissected) like that which 

 Prof. W. K. Parker has figured in Lacerta. To this projecting 

 process is fixed a ligament which is inserted on the free dorsal end 



