Occasional Papers of the Museiiiii of Zoology 33 



. Hybopsis kentuckiensis (Rafinesque) 



PLATE 8 



Ceraiichthys cyclotis Cope, 1. c, p. 277. Grossc Isle: JVatcrford., 

 Oakland County; Clinton River and Bruce, Macomb County. 



Ceraiichthys stigntaticus Cope, 1. c, p. 278. Michigan. 



Head 3 7/8 ; depth 4 1/8 ; D. in, 7, i ; A. in, 6, i ; scales 40 

 in lateral line to caudal base and 3 more on latter ; 7 scales 

 above 1. 1., 6 below; 21 predorsal scales; head width 2 in its 

 length; snout 2 4/5; eye 6; maxillary 6; interorbital 3 i/io; 

 first branched dorsal ray i 1/2; anal ray i 7/8; least depth 

 caudal pedimcle 2 1/3 ; upper caudal lobe i 1/8 ; pectoral 

 I 1/2 ; ventral i 3/5. 



Body compressed, profiles alike, deepest at dorsal origin. 

 Caudal peduncle compressed, least depth 2 in its length. Head 

 compressed, not especially convergent above or below. Snout 

 surface convex, also profile long as broad, slightly protruding 

 beyond mandible. Eye trifle longer than deep, slightly before 

 center in head length. Mouth large, low, horizontally in- 

 clined, broad. Premaxillaries proctractile downward. Max- 

 illary reaches little beyond hind nostril, not quite to eye. Jaws 

 heavy, powerful. Lips thick, fleshy. At lower maxillary end 

 thin pointed barbel equal to pupil. Tongue large, thick, fleshy, 

 adnate. Mandible broad, depressed, rami scarcely elevated 

 inside mouth. Nostrils together, posterior little larger, with 

 cutaneous edge forming flap over posterior one. Interorbital 

 broadly depressed, slightly convex. Preorbital ovate, width 

 3/4 its length, latter i 4/5 in snout. Other suborbitals all 

 narrow. Gill-opening forward last 2/5 in head, isthmus width 

 ' 2 1/5 in snout. Rakers 3 -f 7 short blunt denticles, ends 

 mostly pectinated, length 1/4 of filaments. Pseudobranchi?e 

 large, 4/5 of filaments, latter equal eye. Teeth 4-4, large. 



