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PROFESSOR OWEN ON INDIAN CETACEA. 47 
. Upper view of symphysis of under jaw. 
. Under view of upper jaw of Delphinus euphrosyne. 
All the figures are half the natural size. 
PLATE IX. 
Phocena brevirostris. 
. Side view of cranium and upper jaw. 
. Upper view of ditto. 
. Under view of ditto. 
All the figures are nearly half the natural size. 
PLATE X. 
Euphysetes simus. 
. Side view of female. 
. Upper view of ditto (drawn to scale). 
PLATE XI. 
Euphysetes simus. 
. Side view of male (to same scale as female, Pl. X.). 
. Outline of ditto, with skeleton. 
PLATE XII. 
Euphysetes simus. 
. Side view of skull. 
. Back view of skull (rather more than half the natural size): 
PLATE XIII. 
Euphysetes simus. 
. Upper view of skull. 
. Under view of ditto (half the natural size). 
PLATE XIV. 
. Section of cranium of Euphysetes simus. 
. Section of cranium of Physeter macrocephalus. 
. Euphysetes breviceps. 
