298 CONTKir.UTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 



broad, rcacliiug just about to the anterior margin of eye ; therefore, 

 apparently longer than in tlie next, owing to the shortness of the snout. 

 Maxillary contained 4 times in the length of the head ; mandible 3 times. 

 Mouth inferior. Eye 4| in head. Adipose tin very large, extending 

 behind anah Depth 4:^ in length ; head 4|. D, 11-14; A. 11 5 scales 

 8-74 to 88-7. Gill-rakers short and thick, shorter than j)upil ; about 

 16 below the angle. Clear streams and lakes from the Kocky Mount- 

 ains to the Pacific; abundant in the Sierra, ]S[evada. An excellcut 

 food-fish; variable. 



(Girard, Proc. Acad. Nat. Sci. Phila. 1858, 133; Giiather, vi, 187.) 



4§§. C <jMadri3a,tea'alis Richardson. — PiIot-fi>ili ; Menomonee WIdtc-fish; Shad 

 Walter; Ilound-finh. 



Body elongate, not elevated nor much compressed, the back rather 

 broad, the form more terete than in any of the other species. Mouth 

 very small and narrow, inferior, the broad maxillary not reaching to 

 opposite tlie eye, 5J in head. Head long, the snout compressed and 

 bluntly pointed, its tip not below level of eye; profile not strongly de- 

 curved. Preorbital wider than pupil. Mandible originating under mid- 

 dle of eye, 3^ in head. Adipose fin small. Gill-rakers short and stoutish, 

 but rather longer than in C. wilUamsoni. Head 5 in length ; depth 4^. 

 D. IL; A. 10; scales 9-80 to 90-8. Color dark bluish above, silvery 

 below. Lakes of iS!"ew Hampshire, Upper Great Lakes, northwestward 

 to Alaska ; abundant in cold, deep waters. 



(Richardson, Franklin's Journ. 1823, 714 ; Giinther, vi, 176 : Corcgonus novw-anylla'; 

 Prescott, Amer. Journ. Sci, Arts xi, 342, 1851: Coregonus novoe-anglice Giinther, vi, IbG.) 



4§9. C. JiesiBSicoiti Milner, MSS. .sj). nov. 



Body oblong, elliptical, the back not greatly elevated. Head very 

 short and deep, the snout bluntly deeurved and not projecting, the 

 depth of the head at the nape greater than the distance from the end of 

 the snout to the opercular margin. Mouth not inferior, the jaws almost 

 equal ; maxillary extremely short and broad, not quite reaching to the 

 eye, its length oi in head, its supplemental bone broad-ovate, broader 

 than in dupeiformis. Gill rakers as in G. qnadrilateralls. Preorbital 

 rather broad. Color pale, as in dupe I for mis. Head 5^ in length. T>. 

 11; A. 13; scales 10-90-10. Types Nos. 8971 and 9G00 of the United 

 States National Museum from Fort Good Hope, British America, and 

 Yucon Eiver, Alaska, respectively. A strongly marked species, well 

 distinguished among the American forms by the very obtuse head, but 

 perhaps identical with some Siberian species. 



