SUCKLEY MONOGRAPH OF THE GENUS SALMO. 137 



In 1859 the writer crossed tlie contiueutvia Salt Lake. In the course 

 of this journey many notes were made concerning objects of interest in 

 nature, most of which, liowever, are. from force of circumstances, neces- 

 sarily excluded from these pages. 



None of the Salmonidcv were found along our route on the eastern 

 slope of the Rocky Mountains ; but in most of the streams of Utah, more 

 especially Black's Fork, near Fort Bridger, Weber River, and the Tim- 

 panagos, (flowing into Lake Utah through Provo Oaiion,) the Sulmo vir- 

 ginalis, a very handsome trout, was . 1 ntiful. In its habits and general 

 appearance it much resembles the brook-trout of the Middle States, ( S. 

 fontinalis.) It is abundant in Black's For , from which, on the 25th of 

 August, we caught half a dozen, and on the following day about forty, 

 with the artificial fly, to which they rose exactly in the manner of their 

 more eastern relatives, and greedily seized, like unsophisticated fish, as 

 they were, scarcely, learning caution or timidity until pricked once or 

 twice by the alluring and deceitful bait. Probably but few artificial 

 flies, if any, have ever before been cast on those waters. One speci- 

 men, about 10 inches in length, ( aught with a red-hackle, was selected 

 for examination and description. In general outline it was, perhaps, 

 slightly more stout than the brook-trout of I^ew York, {S. fontinalis.) 

 The curve from the nose to the anterior insertion of the dorsal fin was 

 very regular. The anterior point of insertion of said fin was but slightly 

 in fi'ont of a point at the middle of a line drawn from the tip of the 

 nose to the insertion of the tail. 



Colons. — Ground color of back, pale brown, tinged with red ; spotted 

 above the lateral line with small spots of black, which Avere but spar- 

 ingly distributed anterior to the dorsal finj a few spots of the same col- 

 ors were also found on the opercula and on the top of the head. In 

 shape, the spots anterior to the dorsal fin were nearly round and quite 

 small ; those in the vicinity of the same fin, but farther back, were 

 stellate, but slightly larger, and those posterior to a vertical line drawn 

 from the anus were much larger, more numerous, and quite irregular 

 in form, somewhat resembling those of >S^. stellatus. Anterior to the anus 

 there were scarcely any spots below the lateral line except near the 

 head, where there were about half a dozen j i)osteriorly, however, they 

 were equally numerous both below and above. 



The general style of the spots, their size and distribution in individu- 

 als of this species, are well displayed in the gure given in Volume x, 

 Plate Ixxiii, Figs. 1-4. Indeed, in the markings, spots, &c., of this spe- 

 cies, I noticed great uniformity in all the specimens observed. The color 

 of the dorsal, adipose, and caudal fins was the same as that of the back, 

 but thickly studded with oval and roundish spots of black. The pre- 

 vailing reddish-brown color of the back extended to the nose, but was 

 of a slightly different shade on the head. From the median line of the 

 back it extended down the sides, filling up two-thirds of the space of 

 the lateral line. The silvery-white of the beUy was separated from the 



