2 2 University of Michigan 



head, though not quite to hind edge of eye. Gill-rakers about 

 2 -|-6? weak and rather conic points, much shorter than gill- 

 filaments. Last trifle less than eye. Pseudobranchise about 

 2/5 of eye. Isthmus rather broad and depressed. Teeth ? 

 extracted. 



Scales large, cycloid, with numerous concentric strise, of 

 mostly uniform size, and placed in lengthwise rows parallel 

 with 1. 1. Predorsal scales now crowded, though those on 

 base of caudal and breast little smaller than elsewhere. No 

 scaly axillary ventral flap. L. 1. complete, decurved little at 

 first, low along side of caudal peduncle and reaches middle of 

 caudal base; tubes simple, extend well over each scale, though 

 not quite to its edge. 



Dorsal origin nearer caudal base than snout tip by space 

 equal to snout length, graduated down from first branched 

 ray, which highest, and depressed fin reaches half way to 

 caudal base. Anal inserted just behind last dorsal ray base, 

 first branched ray longest with others graduated dowm and 

 depressed fin reaches about 3/5 to caudal base. Caudal well 

 emarginated, lobes (damaged) apparently of about equal 

 length. Pectoral long, slender, pointed, uppermost rays long- 

 est and fin reaches 3/4 to ventral. Last inserted slightly be- 

 fore dorsal origin, fin rather long and pointed, and reaches 

 anal origin. Vent close before anal. 



Color in alcohol pale brownish, more or less uniform, 

 scarcely more pale below than above. Sides of head, espe- 

 cially cheek and opercle, with brassy and silvery reflections. 

 Upper surface of head darker than lower. Iris dull brassy, 

 also pupil. Fins all pale or dull uniform brownish. 

 Length 58 mm. (caudal damaged). 



No. 2,840, A. N. S. P., type of Hybopsis frctcnsis Cope. 

 Near Detroit, Michigan. E. D. Cope. 



