TAB. XIX. 



Trionyx incrassatus. 



The parts are figured half the nat. size. 

 Fig. 



1. Entosternal. 



2. Episternal, under side. 

 2'. Ditto. upper side. 



3. Part of right hyosternal, and the hyposternal, under or outer side. 

 3'. hs, Ditto, diwdps, ditto, upper side. 



4. Two views of the scapula (51), and connate acromial clavicle (58) ; 4" shows the 



osseous structure of the end of the scapula, nat. size. 



5. The coracoid. 



6. 6'. Two views of the ilium. 



7. 7'. Two views of the femur. 



8. 8. Two views of an ungual phalanx, nat. size. 



9. Under view of the sixth cervical vertebra ; 1/, y, the hypapophyses. 



9'. Upper view of tlie same vertebra ; c, the anterior convex articular surface of the 

 centrum ; n, the neural arch ; z, z, the zygapophyses (oblique or articular 

 processes). 



9". Back view of the same vertebra, showing the double concavity of the articular 

 surface. 



