250 THE CANADIAN NATURALIST. [Aug. 



Genus Orcynus (Cuv.) Gill. 



Lateral line simple. Yomer and palatines as well as jaws, with 

 small teeth. D. xii — xv. 



Orcynus secundo -dor sails Gill ex Storer. Horse-mackerel; 

 Albicore. (Perley.) 



Thynnus secundo-dorsalis, Storer, Mem. Am. Ac. v, 143, pi. xii. 



XIPHIIM: Bon. 

 XlPHIIN^E (Bon.) Gill. 

 Ventral fins obsolete. 



Genus Xiphias (L.) Cuv. 



Tail with a single cutaneous keel. Dorsal fin in young, entire 

 behind ; in adult, with the greater portion of the spinous part 

 obsolete. 



Xvphias gladius Linn.f Sword-fish. (Perley.) 



Xipbias gladius, Storer, Mem. Am. Ac. v, 149, pi. xiii, fig. 2. 



GASTEROSTEID^] Bon. 

 Gasterostein^} (Bon.) Brevoort. 

 Body more or less fusiform. Head conic or sub-conic. 



Genus Gasterosteus (L.) Brev. 

 Body stout, fusiform. Free dorsal spines 2 — 3. 

 Gasterosteus biaculeatus (Shaw) Mit.* Stickleback. (Perley.) 

 The species of this genus require a thorough re-examination. 



Genus Pygosteus Brevoort. 

 Body elongated, sub-fusiform. Free dorsal spines 6 — 10. 

 Pygosteus occidentalis Brev. ex Cv.* 

 Pygosteus Dekayi Brev. ex Ag.* 

 These species likewise require confirmation. 



SCORPJENID.E (Sw.) Gill. 

 Scorp.enin/e (Bon.) Gill. 

 D. xi — xv. Spinous and soft dorsals connected. 



f On the point of sending this for publication, I received from Mr. 

 Jones of Halifax, a figure of two caudal vertebrae of this species 

 obtained while dredging in the harbor of Halifax. 



