EXPIvANATION OF PLATE III. 



Mouths of Indian Trygonid^. 



Fig. I. — Internal view of mouth of Trygon microps (much reduced). 



T. uarnak (much reduced). 

 3. „ „ ,, Hypolophus sephen (much reduced). 



4- ,, „ ,, Trygon kuhlii. 



5- ,, ,, ,, ,, imbvicata or i 

 6 



Urogymnus asperrimus (much reduced). 

 Trygon bleekeri (reduced). 



,, favus (much reduced). 



,, marginatus (much reduced). 



