516 Bulletin 47, United States National Afuseum. 



about 12 inches in length. Body subfusiform, compressed, pointed at 

 snout, slender at the tail. Height of body near of the total length ; head 

 ^, crown convex. Snout 1 J, and interorbital space 1| times the eye. Eye 

 little less than of the head, of the space between the orbits on the 

 forehead. Mouth large ; maxillary straight, extending backward almost, 

 as far as the hinder edge of the eye, bearing strong teeth on its lower 

 edge for nearly its entire length. Teeth on intermaxillary and mandi- 

 bles stronger. The tongue bears a series of four strong hooked teeth at 

 each side, and behind the glossohyal on the basibranchials there is a 

 band of several series of smaller ones. Opercle thin, with a few striae. 

 Scales very small ; apparently there are about 230 in the series imme- 

 diately above the lateral line, and more than 250 in a row 5 or 6 scales 

 above this. Distance from first ray of dorsal to end of snout little more 

 than that from the same ray to the tip of the adipose fin. The middle 

 of the total length falls halfway between the ends of the hinder rays of 

 the dorsal and its base. Dorsal and anal fins are slightly emarginate at 

 the ends of their median rays. Pectorals and ventrals small ; base of 

 latter slightly behind the middle of that of the dorsal. Caudal pedicle 

 slender, notch very deep, hinder border sinuous, as in Salmo alpinus, 

 lobes pointed. The caudal notch is deeper in this species than in any 

 other of the American forms except C. namaycush. 



Back dark brown, with an iridescent bluish tint, unspotted ; dorsals 

 dark, clouded, without spots or bands; pectorals, anal, and ventrals 

 orange in the middle, yellowish or whitish toward bases and at their mar- 

 gins. The dark color of the back shades into whitish, tinged with pink 

 below the lateral line; ventral surface white, no doubt reddish in breed- 

 ing season ; head black on top, silvery on the cheeks, white beneath. 

 Flesh pink. Caudal fin yellowish toward the base, brown toward the 

 hinder border, which has a narrow edging of light color ; faint areas of 

 lighter tint suggest a few spots of red in life along the lateral line; the 

 condition of the specimens is such that this may be left in question, as 

 also the number of cceca or presence of parr bands, of which there are 

 faint indications. 



This fish is evidently allied to the blueback of the Rangeley Lakes, 

 S. oqnassa, but reaches a greater size than that species, and is readily 

 distinguished by the maxillary and its dentition, the caudal fin, and the 

 coloration. Similarly when compared with S. arcturus, S. stagnalis, and 

 S. rossi, it is seen to be quite distinct. With the saibling, S. alpinus, 

 introduced in Sunapee Lake and elsewhere, it has still less in common. 



Our specimens were taken in Lac de Marbre, Ottawa County, 

 Province of Quebec, Canada, whence they were sent by favor of the 

 Hon. J. G. A. Creighton. They reached us at the instance of Mr. A. N. 

 Cheney. (Garman. ) (Named for R. B. Marston, editor of Fishing Gazette, 

 London.) 



Salmo marstoni, CABMAN, Science, July 14, 1893, 23, Lac de Marbre, Ottawa County, 

 Quebec. 



