PEOFESSOR OWEN ON INDIAN CBTACEA. 47 



Fig. 4. Upper view of symphysis of under jaw. 



Fig. 5. Under view of upper jaw of Belphinus euphrosyne. 



All the figures are half the natural size. 



PLATE IX. 



Plwccena brevirostris. 

 Fig. 1. Side view of cranium and upper jaw. 

 Fig. 2. Upper view of ditto. 

 Fig. 3. Under view of ditto. 



All the figures are nearly half the natural size. 



PLATE X. 



Euphysetes simus. 

 Fig. 1. Side view of female. 

 Fig. 2. Upper view of ditto (drawn to scale). 



PLATE XL 



JEuphysetes simus. 

 Fig. 1. Side view of male (to same scale as female, PI. X.). 

 Fig. 2. Outline of ditto, with skeleton. 



PLATE XII. 



Eupkysetes simus. 

 Fig. 1. Side view of skull. 

 Fig. 2. Back view of skull (rather more than half the natural size): 



PLATE XIII. 



Eupkysetes simus. 

 Fig. 1. Upper view of skull. 

 Fig. 2. Under view of ditto (half the natural size). 



PLATE XIV. 



Fig. 1. Section of cranium oi Euphysetes simus. 



Fig. 2. Section of cranium oi Physeter macrocephalus. 



Fig. 3. Eupkysetes hreviceps. 



