Storer’s Synopsis of the Fishes of North America. 455 
1. Thymallus signifer, Ricn. é 
Back dark ; sides bluish gray ; belly blackish gray, with irregular whitish blotches. Five 
or six quadrangular prussian-blue spots on the anterior part of the body, each tinging the 
margin of the four adjoining scales. Head brown; a blue mark on each side of the lower 
jaw. Dorsal blackish-gray, with lighter blotches, and crossed by beautiful Berlin-blue spots ; 
it is edged with light lake-red ; ventrals streaked with reddish and whitish lines in the direc- 
tion of their rays. Scales semioval, covered with an epidermis ; eighty-seven on the lateral 
line, including three or four small ones on the base of the caudal, and twenty-seven in a 
vertical row anterior to the ventrals, of which nine are above the lateral line. Dorsal very 
large; its three last and longest rays exceed in height the greatest depth of the body. 
D. 23. P.15. V.9. A.13. ©. 19%. Length, 17 to 18 inches. 
Northwestern regions, RicHarDsoN. 
Called ‘‘ Hewlook-powak,”’ by the Esquimaux ; ‘‘ Poisson bleue,’’ by Canadian Voyagers. 
Coregonus signifer, Ricw., Franklin’s Journal, p. 711, pl. 26. 
Salmo (Thymallus) signifer, Back’s Grayling, Riew., Fauna Boreal. Americ., 111. p. 190, pl. 88. 
Coregonus thymalloides, Ricu., Franklin’s Journal, p. 714 (young). 
Salmo (Thymallus) thymalloides, Lesser’s Grayling, Ricu., Fauna Boreal, Americ., 11. p. 194. 
Thymallus signifer, Back’s Grayling, Jarpine, Nat. Lib., Ichth., m1. p. 120, pl. 11. 
GENUS VII. SAURUS, Cov. 
Have the muzzle short ; the mouth cleft as far as behind the eyes ; the edge 
of the upper jaw formed almost entirely by the intermaxillaries ; several very 
pointed teeth along both jaws, the palatines, the tongue, and the pharyngeals, 
but none on the vomer ; eight or nine, and frequently ten or fifteen, rays to 
the gills. The first dorsal is a little behind the ventrals, which are large ; 
scales on the body, cheeks, and opercula; the viscera resemble those of 
Trouts. 
1. Saurus Mexicanus, Cuv. 
Almost transparent. 
D.(@). BP. (@). V.@) A. (@). ©. @). Length, (?). 
Mexico, Cuv. 
Saurus Mexicanus (Cuy., Régne Animal), Grirrity’s Cuv., x. p. 431. 
FAMILY XXI. CLUPEID. 
No adipose fin. The upper jaw is formed as in the Trouts, at the middle 
by intermaxillaries, without pedicles, and on the sides by the maxillaries. 
Their body is always very scaly. I 
