EXPLANATION OF PLATE III. 
Mouths of Indian Trygonidæ;. 
Fig. I. — Internal view of mouth of Trygon microps (much reduced). 
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II 
,, T. uarnak (much reduced). 
,, Hypolophus sephen (much reduced). 
,, Trygon kuhlii. 
,, ,, imhricata or walga. 
,, ,, gerrardii. 
,, ,, zugei. 
,, Urogymnus asperrimus (much reduced). 
,, Trygon hleekeri (reduced). 
,, ,, favus (much reduced). 
,, ,, marginatus (much reduced). 
