168 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxvi. 



length, Gillrakers on first arch, 10 + 32 ; very slender, those near 

 angle equal in length to diameter of eye. 



Lateral line almost straight. Scales large and rather loosely 

 attached. 



•Dorsal inserted midway between anterior border of eye and base 

 of caudal ; height of first ray contained about If times in length of 

 head; length of base of adipose dorsal about equal to its height; 

 origin of ventrals below middle of dorsal, the rays slightly shorter 

 than those of dorsal; length of first anal ray, 2| in head; caudal 

 deeply forked ; pectoral short, about 1^ in head. 



Color in life, clear metallic blue above, silvery below; in spirits, 

 silvery; dusky above, light below; a very indistinct, narrow^, dusky 

 stripe along each row of scales on upper half of body; dorsal with 

 a broad dusky margin ; caudal largely dusky ; a mere trace of dark 

 color on paired fins and the anal. 



Type.~Cat. No. 62516, U.S.N.M., measures 14f inches in length 

 and was taken at Port Stanley, Ontario, by the writers, on July 



Fig. 2. — ARGYROSOMr.s iiduonuis. 



29, 1908. A cotype. No. 13082, Stanford University collection, meas- 

 uring 17 inches long, has ten rays in the dorsal and a slightly longer 

 pectoral. 



, The species is known locally at Port Stanley as Lake Huron Her- 

 ring, or Blueback. About a dozen were found mixed with about a 

 thousand of Argyrosomiis eriensis. 



The flesh of this species is rather dry and flavorless, something 

 like that of the Menominee A^'liitefish, Coregonus quadrilateralu^ and 

 it is not to be compared as a food fish with the Erie Cisco. 



The species seems to be quite as common in Lake Huron as is the 

 usual lake herring, Argyrosomus artcdi. It has not been noted from 

 Lake Superior or Lake Ontario, in both of which lakes Argyrosomus 

 artedi is abundant. A number of specimens were obtained from off 

 Mackinac, but none of these was preserved. In our field notes is the 

 following account of one of these : 



Arf/yrosomi(s liuniniiis, a lake berrins called Blueback, taken off Mackinac 

 Island, by Leggett, a fisbenuau at Mackinac, August 3, 1908. 



