6 University of Michigan 



Another from the same locaHty (Smithsonian Inst. No. 

 ii,o88) also in poor preservation. Head about 4 3/5; depth 

 about 4 3/5; D. VIII, 14; A. iv, 9; scales in 1. 1. 80 to caudal 

 base and 5 more in latter; 9? scales above 1. 1., 8 below; 28 

 predorsal scales ; length about 242 mm. 



Head 5 1/6; depth 4 2/5; D. viii, 14; A. v, 10, i; scales 

 86 in 1. 1. to caudal base and 5 more in latter; 9 scales above 

 1. 1., 9 below ; 25 predorsal scales ; snout 4 in head measured 

 from upper jaw tip ; eye 4; maxillary 2 3/5 ; interorbital 4 1/8; 

 last dorsal ray i 2/5 ; pectoral i 2/5 ; ventral i 2/5 ; least depth 

 of caudal peduncle 2 2/5; length 318 mm. Dried skin from 

 Michigan (J. A. Shultz). It shows a few small dusky spots 

 at the front costal region, all well separated. 



ICTALURID.K 



Ictahinis punctatus (Rafinesque) 

 Ictalurus gracilis Cope, 1. c, 1864, p. 276. 



Anieiiirus natalis (Le Sueur) 

 Amciunts natalis Fowler, 1. c, 1915, P- 207. Oakland County. 

 Amcunis cuprcus Cope, 1. c, (same material). 

 One example in the collection. 



Amciunts vulgaris (Thompson) 

 PLATE I 



Head 3 1/3; depth 4; D. I, 5, i ; A. vi. 14, i ; snout 2 4/5 

 in head measured from upper jaw tip ; eye 9 ; maxillary 3 ; in- 

 terorbital 2 i/'8. 



Body long, well compressed, deepest at dorsal origin. Head 

 well depressed, much wider than deep. Snout broadly de- 



