500 



DR. ST. G. MIVART ON THE PINNIPEDIA. [May 19, 



Proportions borne to the spine from the atlas to the end of the 

 sacrum, taken at 100, of: — 



Trichechiis 



Cervical region 



Dorsal regiou 



Lumbar region 



Sacral region 



Caudal region 



Pectoral limb 



Pelvic limb 



Humerus 



Radius 



Femur 



Tibia 



3rd metacarpal 



3rd metatarsal 



1st metacarpal 



1st metatarsal 



3rd phalanx of 3rd digit (manus) .... 

 3rd phalunx of longest digit (manus) 



3rd phalanx of 3rd digit (pes) 



3rd phalanx of longest digit (pes) .... 



Basion to premaxilla 



Length of palate 



Breadth of palate 



„ zygomata 



„ brain-case 



„ interorbital space 



Length of lower dental series 



Length of — ^— 



P. i 

 Breadth of 



Length of 



16-5 



47-8 



24-5 



110 



150 



35-3 



52-3 



15-2 



11-7 



120 



17-2 



3-5 



5-8 



50 



60 



1-3 



2-9 



1-7 



1-6 



16-5 



8-5 



3-2 



11-3 



8-2 



3-6 



39 



Proportions borne to the skull from basion to premaxilla, being 

 taken at 100, of: — 



