146 DISC0GL0SSIDJ5. 



not reaching the vomers, leaving the ethmoid un- 

 covered, or covering but a small portion of it. Stapes 

 absent. No well-defined mento-Meckelian bones. 



Hyoid a large broad plate with two pairs of ossifica- 

 tions ; ceratohyal cornua broad and without forward 

 processes; postero-lateral process large, ossified at the 

 base, this ossification extending to the body of the 

 hyoid and sometimes nearly meeting its fellow in front 

 of the likewise ossified but slender thyrohyals. 



Vertebral column twice and one- third to twice and 

 a half as long as the skull. Vertebras imbricate, the 

 column closed above. Second, third, and fourth ver- 

 tebrae with short diapophyses and small distinct ribs, 

 the second of which is the longest, and bears a small 

 posterior process as in Diseoglossus. The first diapo- 

 physis is directed forwards, the second, third, and 

 fourth are nearly horizontal, and the three following 

 are again directed forwards. The diapophysis of the 

 sacral vertebra are very strongly dilated, and cover 

 the anterior third of the pelvis ; their longitudinal 

 diameter, without the cartilaginous epiphysis, equals 

 about twice the transverse diameter ; this vertebra 

 has a single condyle for articulation with the urostyle. 

 As in Diseoglossus, the latter bone has a posteriorly 

 directed, slender transverse process on each side at 

 its base, but usually more developed, its length often 

 exceeding that of any of the processes of the presacral 

 region ; it is sometimes followed by a second similar 

 process ; the length of the urostyle equals that of 

 the skull, or of the six or seven anterior vertebrae. 



Proecoracoids moderately slender, strongly curved, 

 entering the glenoid cavity ; coracoids little stronger, 

 feebly curved ; supra-scapula cartilaginous, or partially 

 ossified ; sternum cartilaginous, produced into two 

 long, slender, diverging processes. Humerus once 

 and one-third as long as radius-ulna. Carpus with 

 eight elements, as in Diseoglossus, two of which are 

 in contact with radius-ulna ; two bones in the pollex. 



Pelvis measuring three-fifths to two-thirds the 



