14 University of Michigan 



bladder. Granting C. hrcvis is distinct on the basis of the mod- 

 ified aHnientary canal, it is certainly covered in all other char- 

 acters by my series of C. auomalum. 



Hybof/iiathits nuchalis Agassiz 



Hybognathus miclialis Cope, Proc. Acad. Nat. Sci. Phila., 1864, p. 

 284. Grosse Isle. 



Pinicpluilcs prom das Rafinesque 

 Phiicplialcs proinclas Cope, 1. c, p. 282. Near Lansing. 

 Piuicplialcs iiiilcsii Cope, 1. c. Grosse Isle, Detroit Rk'er. 



Head 3 3/5 ; de])th 3 2/3 ; D. in, 7, i ; A. in, 6, i ; scales 40 

 in median lateral series to caudal base and 2 more on latter ; 

 about 14 scales transversely between dorsal and anal origins ; 

 22 predorsal scales ; head width i 4/7 its length ; head depth 

 I 1/3 ; snout 3 ; eye 3 7/<S; maxillary 3 2/3 ; interorbital 2 1/3 ; 

 second branched dorsal ray i 3/4 ; second branched anal 

 ray 2 1/4; least depth of caudal peduncle 2 1/8; upper caudal 

 lobe about i ; pectoral i 2/5 ; ventral i 3/4. 



Body rather fusiform or with similar profiles. Least depth 

 of caudal peduncle i 3/4 in its length. Head rather broadly 

 conic, sides somewhat compressed or flattened though not con- 

 stricted below. Snout broadly convex, length 2/3 its width. 

 Eye circular, high and about first 2/5 in head. Maxillary in- 

 clined, reaches about op]:)Osite hind nostril. Lips fleshy and 

 luandible rather broad, not very convex. Nostrils together on 

 snout, above and just before eye. Interorbital broadly convex, 

 depressed medianly. Preopercle with rather abrupt angle. Pre- 

 orbital about as long as eye. Teeth 4-4. slender, scarcely 

 hooked, tips pointed, with well developed concave grinding sur- 

 faces. L. 1. present only as several tubes anteriorly and ex- 

 tending about half way to dorsal. Dorsal origin nearer caudal 

 base than snout tip by length of latter. Anal origin inserted 



