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Lates gracifis. AGASSIZ. 

 PLATE XXXIII. 



So named from the apparently more than 

 isualiy slender appearance of the body, notwith- 

 standing the flattening which it may have received. 

 It is from the calcareous schist of Monte Bolca, 

 where it is found in great abundance. The scales 

 are smaller than in any of the living species, but 

 do not otherwise differ. Other two fossil species 

 of this genus are also described from the same 

 locality, one of which has yet only been found in 

 this deposit, while a fourth, //. macrourus, is 

 noticed from the vicinity of Sevres. Our second 

 example is the 



