48 University of Michigan 



Percina caprodes (Rafinesque) 

 Percina caprodes Cope, 1. c. Grosse Isle. 



Hadropterus aspro (Jordan) 



Cottogaster shumardi (non Girard) Fowler, Proc. Acad. Nat. Sci. 

 Phila., 1906, p. 521. Michigan. 



Crystallaria asprcUa (non Jordan) Fowler, 1. c, p. 524. Grosse Isle. 



Head 3 2/5 to 3 3/4; depth 5 1/4 to 5 3/4; D. XIII or 

 XIV-ii, 12; A. II, 10; scales 60 to 65 in 1. 1. to caudal base 

 and 3 to 5 more on latter ; 7 or 8 scales above 1. 1., 8 to 10 be- 

 low; about 12 predorsal scales; snout 4 to 4 1/8 in head; eye 

 3 to 4; maxillary 3 to 3 1/5 ; interorbital 5 to 6. 



Body elongate and rather slender, compressed. Head mod- 

 erate, compressed. Snout long as wide. Eye large, high. 

 Mouth little inclined. Maxillary reaches beyond front of 

 eye but not quite to pupil. Teeth small, in bands in jaws and 

 on vomer and palatines, some slightly enlarged and curved. 

 Jaws about even. Interorbital level. Gill-rakers i + 12, 

 lanceolate, about 2 in filaments. Scales ctenoid, about uni- 

 form. Middle line of belly naked, also breast, prepectoral and 

 predorsal regions. L. 1. complete, midway along side. First 

 dorsal inserted midway between snout tip and soft dorsal ori- 

 gin. Latter little nearer origin of spinous dorsal than caudal 

 base. Anal origin little behind soft dorsal origin. Caudal 

 convex behind. Pectoral i 1/4 in head, half way to anal. 

 Ventral i 2/5 in head, and little over half way to anal. 



Color in alcohol faded brownish generally. Indistinct 

 traces on median row of seven large dark blotches along 1. 1. 

 Fins plain brownish barred with darker, and dark spot small- 

 er than pupil at caudal base medianly quite distinct. Lower 

 surface paler than upper. 

 Larger example 55 mm. 



