260 THE CANADIAN NATURALIST. [Aug. 



Genus Pomolohus (Raf.) Gill. 



Scales simple. Pre-operculum with an oblong horizontal process ; 

 cheeks longer than high. Upper jaw notched at symphysis. Roof 

 of mouth edentulous. 



Pomolohus pseudo-harengus Gill ex Wilson. Alewife; Gaspe- 

 reau. (Perley.) 

 Alosa cyanonoton, Storer, Mem. Am. Ac. vi, 339, pi. 27, fig. 1. 

 Alosa tyrannus, Storer, Mem. Am. Ac. vi, 337, pi. 26, fig. 3. 



Genus Brevoortia Gill. 

 Scales ciliated or pectinated behind ! * 



Brevoortia menhaden Gill ex Mitch. 



Alosa menhaden, Storer, Mem. Am. Ac. vi, 336, pi. 26, fig. 4. 



ESOCID^(Cuv.) 

 Genus Esox Linn. 

 Esox reticulatus Les. Pike ; Pickerel. (Fortin.) 



Esox reticulatus, Storer, Mem. Am. Ac. vi, 311, pi. 24, fig. 1. 



STOMIATID^E Gill. 

 Genus Malacosteus Ayres. 

 Body naked. Gape rectilinear. Opercular bones much reduced. 

 * Malacosteus niger Ayres. 



Malacosteus niger, Ayres, Boston Journ. Nat. Hist. 



SUB-ORDER EVENTOGNATHI Gill. 



1. Lower pharyngeal bones with 1-3 rows of teeth, the primary 

 row containing only 5-7. Cyprinid^e. 



2. Lower pharyngeal bones with a row of numerous pectiniform 



teeth. CATASTOMIDiE. 



CYPRINID^] (Cuv.) Gill. 

 Genus Stilbius (Dek.) Gill. 



Head and body much compressed, silvery. Back much arched. 

 Lateral line very low. 



Stilbius Americanus Gill ex Lac. Shiner ; Carp. (Perley.) 

 Leucosomus Americanus, Storer, Mem. Am. Ac. vi, 283, pi. 21, fig. 

 2. D. 9-10, A. 15-16, P. 15-17, V. 9. 



