202 



CALIFORNIA ACADEMY OF SCIENCES. [Proc. 3D Ser. 



EXPLANATION OF PLATE XI. 



Fig- 



1. 



Fig. 



2. 



Fig. 



3- 



Fig. 



4a. 



Fig. 4*- 



Fig. 



5- 



Fig. 



6. 



Side view of Mitsukurina owstoni, gen. et sp. nov. 



Top view of head. 



View of head from below. 



Teeth of upper jaw, 2d, 3d and 9th. 



Teeth of lower jaw, 2d, 5th, 9th and 10th. 



Section of skin of side. 



Nostrils. 



