MALACOPTERYGII ABUOMINALES. 225 



the ventrals correspond with the anterior edge of the first dorsal. 



Taken in the ocean and at the mouths of large rivers. 



O. eperkmus; Sal. eperlcmus, L., Bl. 28, 2. (The Smelt.) The 

 only species known; it is small, and ornamented with the most 

 dazzling silvery and light green tints; an excellent fish. 



Mallotus, Cliv. 



The cleft mouth of the preceding, but very small and crowded 

 teeth, only in the jaws, palate and tongue; eight branchial rays; the 

 body elongated and covered with small scales; the first dorsal and 

 Tentrals posterior to the middle; particularly distinguished by large 

 round pectorals, which almost meet beneath. 



But a single species is known, Salnio groenlandicus, Bl., 381; 

 the Capdan, Duhamel, Sect. I, pi. xxvi; Clupea villosa, Gmel. 

 A small fish employed as a bait in the Cod fisheries. The flank 

 of the male during the spawning season is marked with a broad 

 band furnished with long, narrow and raised scales, resembling 

 hairs. 



Thymallus, Cuv.(l) 



Structure of the jaw similar to that of a Trout; the mouth, how- 

 ever, is but slightly cleft, and the teeth are extremely fine: first dor- 

 sal long and elevated; it has larger scales, which also serve as a 

 mark of distinction from the Trout, which this fish resembles in 

 habits and delicacy of flesh. The stomach is a very thick sac; seven 

 or eight rays in the branchiae. 



T. vulgaris; Salmo thymallus^ L., Bl. 24. (The Grayling.) 

 First dorsal as high as the body, and twice as long as it is high, 

 spotted with black and sometimes with red; brownish, longitu- 

 dinally streaked with blackish; a good fish. (2) 



COREGONUS, Cuv. 



The mouth as in the preceding subgenera, and more feebly armed, 

 as it is frequently edentated; scales still larger; length of the dorsal 

 less than the height of its anterior portion. Several very similar 

 species are found in Europe; one of them, however, 



C. oxyrhynchus; Salmo oxyrhynchiis., L.; Bl., 25, under the 

 false name of Lavaret; the Houting of the Belgians, is easily 



(1) Artedi comprehended both the HymallL and Coregoni in his genus Cobe- 



GOKUS. 



(2) Add, Coregonus signifer, Richardson, I, Voy. Capt. Franklin, p. 26; Cor. 

 thymallo'ides. Id. 



Vot. II. 2 D 



