OATOSTOMIDiE. — GIX. 321 



9. CARPIODES, Rafinesque. Oaep Suckbes. 



* First rays of dorsal very much elevated and attenuated, about 

 as long as the base of the fln. 

 f Muzzle conic, projecting. 



1. 0. velifer, (Raf.) Ag. Spbae Fish. Sail Fish. 

 QuiLLBACK. Skimback. Muzzle conic, much less obtuse 

 than in the next; depth 2^ in length; head 3f ; eye 4;^ 

 in head; color pale, scarcely silvery, as in all the species; 

 D. 23; lat. 1. 37. Ohio R. 



XX Muzzle very abruptly obtuse. 

 a. Anterior suborbital bone sub-triamgular, longer than deep. 



2. C. selene, Cope. Moon Carp - Suckbk. Back 

 steeply elevated; intermaxillaries far in advance of 

 orbit; D. 26; V. 10; A. 8; lat. 1. 37; silvery. Great 

 Lakes, abundant. 



aa. Anterior suborbital bone, much deeper than long. 



3. C. catisanserinus. Cope. Lokg - Finned Caep 

 SucKEE. Mouth usual in position, the upper lip in 

 advance of the nostrils, etc.; dorsal fin beginning mid- 

 way of body more elevated than in any other species; 

 snout with small tubercles in spring males; head 4 in 

 length; depth 2|; D. 26; V. 10; A. 8. Ohio Valley, 

 abundant. 



4. C. difformis. Cope. Defoembd Caep Suckbe. 

 Eye very large, and well anterior; the front edge of the 

 lower jaw in line with the anterior rim of the orbit, and 

 the end of the upper lip reaching the line of the anterior 

 rim of the orbit, the physiognomy being therefore 

 peculiar in the great obtuseness of the head; insertion 

 of dorsal anterior to middle of the head; D. 24; A. 8; 

 V. 9; lat. 1. 35. Ohio River. 



** Anterior rays of dorsal soai'cely filamentous, little more than 

 half the length of the base of the fln. 

 &. Head comparatively large, 3i to 4 in length. 

 21 



