78 TKLEOSTEI : ISOSPONUYLl. — XIII. 



184. C. labradoricuB Kicliiinlson. Sault White -Fisn. 

 MusQUAw liivKK Whitk-kish. " WniTiNG." Head com- 

 pressed, rather lonj;;; month ratlier small, the jaws e(jual; maxillary 

 to front of j)U|)il ; eye 4^ in head; supraorbital narrow ; D. hii^h 

 in front, its last rays short, liluisli, sides little silvery; fins dusky. 

 Head 4^ ; dei)th 4 J. D. 11. A. 11. Scales 'J-HO-H. L. 20. 

 AVIiite Mts. to Labrador and L. Superior; abundant N. 



aa. Lower jaw pmjci'tinj;; pn'iiia.xillaries narrow, not vertically placed; pre- 

 orbital elonpite; j^itl rakers very lonj; and slender, about X + 30; the 

 cleft of the mouth 2] to -ii in the head. 

 d. Body elongate, herrinfj-sliaped; scales small, uniform, the free edges 

 convex. (Ar</yrusomus Agasstiz.) 

 e. Lower tins pale, or tipped with dusky. 

 y. Scales brilliantly silvery, without dark specks. 



185. C. hoyi ((lill). Laice Moon-eye. Cisco of Lake 

 Michigan. Head rather lon^j, lower jaw barely included ; maxil- 

 lary li in head to middle of Jiupil; eye very larj^e, 3^ in head; lower 

 jaw little projecting; gill rakers nearly as long as eye ; (ins low ; 

 free edge of D. very oblicjue. Color blui.-li, sides brilliantly silvery, 

 as in lliodon and Albula. Head 4} ; depth 4}. I). 10. A. 10. 

 Scales 7-75-7. L. 12. Smallest and prettiest of our white-fishes, 

 from Skaneateles L., N. Y., to L. Mich., in dec]) water. (To Dr. 

 Philo II. Hoy, of Racine, Wis.) 



ff. Scales more or less punctulate with darker. 



186. C. artedi Lc Sueur. Lake Heuuing. Cisco. Michi- 

 gan Herhing. Maxillary 3^ in head, reaching mifldle of j)upil; 

 eye 4 to 5 in head. Bluish or greenish, sides silvery ; scales and 

 fins with dark 9j)ecks. Head 4j; <lepth 4^. D. 10. A. 12. Scales 

 8-75 to 90-7. L. 15. (Jreat Lakes to Labrador ; very abundant, 

 usually in shoal waters, also land-locked in lakes of X. Ind. and 

 Wis. (var. siaco Jordan), where it lives in deep water, spawn- 

 ing near shore in December. (To Peter Artedi, the "father of 

 ichthyology.") 



€C. Lower fins blue-black. 



187. C. nigripinnia ((Jill). Blue-fin. Body more robu:«t than 

 in C. artedi ; mouth large; eye 4 in head; teeth present, minute. 

 Dark bluish, sides silvery, punctulate. Head 4^; depth ;?J. D. 10. 

 A. 12. Scales ;»-88-7. L. 20. L. Mich., in deep water. (Lat., 

 niger, black; pinna, fin.) 



dd. Body .tliort, deep, compressed ; the curve of back similar to that 

 of belly; .scales large, larger forwards, closely imbricated ; the 

 fwe margin little convex. (AlUtomus Jordan.) 



188. C. tullibee Richardson. Tulliiiee. " Monghel White- 

 fish." Head much as in C. niffrijiinnis ; maxillary as long as 

 eye; jaws e<iual when closed; eye as long as snout, 4 J. Bluish, 



