1862.] DR. A. GXJNTHER ON THE BRITISH CHARRS. 49 



I have described and figured, I have found only fifty-nine vertebrce 

 — a number stated also by Yarrell. A difference of eight vertebrae 

 will not be found within the limits of one species of Salmo ; but it 

 is a question whether the skeleton in the Paris Museum really is 

 that of an Iceland Charr*, Valenciennes having comprised under 

 the name oi Salmo alpimis "plusieurs Truites rapportees de Norvege 

 par Noel de la Moriniere, ou de Suede et d'Islande par M. Gaimard," 

 without adding whether the skeleton referred to belongs to a Scan- 

 dinavian or Iceland specimen. 



Faber ('Fische Islands,' p. 168) also mentions the Iceland ChaiT 

 under the name of Salmo alpinus, a name which cannot be applied 

 to the specimens brought by Mr. Hogarth, for the same reasons as 

 stated above. The description given by him is valueless with regard 

 to specific distinction ; and as he unites a true (freshwater) Charr 

 with another fish regularly entering the sea, it is probable that he 

 has confounded two species. 



Salmo cambricus (PI. VI.). 



(The Torgoch of Llanberris.) 



Body slightly compressed and elongate, its greatest depth being 

 one-fifth, or two-ninths, of the distance of the snout from the root 

 of the caudal fin ; the length of the head is considerably more than 

 one-half of the distance of the snout and of the vertical from the 

 origin of the dorsal. Head rather depressed, interorbital space flat, 

 its width being less than twice the diameter of the eye. Male with 

 the lower jaw longest ; teeth of moderate strength, — six in each in- 

 termaxillary, twenty in each maxillary. Length of the pectoral less 

 than that of the head, much more than one-half of the distance 

 between its root and that of the ventral. Dorsal rays thirteen 

 (fourteen). 170 transverse series of scales above the lateral line. 

 Sides with numerous red dots, belly red; pectoral, ventral, and 

 anal with white margins. 



The numerous specimens examined of this species agree in every 

 respect with one another. "We take for the following description a 

 male specimen 9 inches long, the usual size of the Torgoch, which 

 scarcely ever excefcds the length of 12 inches. 



Body rather compressed and elongate ; its greatest depth is below 

 the origin of the dorsal fin, where it is contained five times or four 

 times and a third in the total length (without caudal). The least 

 depth of the tail is three-fifths or two-thirds of the length of the 

 base of the dorsal fin. The height of the head above the mandi- 

 bulary joint equals the distance between the posterior margin of the 

 orbit and the end of the operculum. The upper profile of the head 

 is not elevated above the margin of the orbit, and is slightly concave. 

 The diameter of the eye is one-fifth of the length of the head, two- 

 thirds of the extent of the snout, and more than one-half of the 

 width of the iuterorbital space ; the latter is flat, with the median 



* Salmo umbla (Lake of Constance) has sbcty-five vertebrae (Rapp, Bodensee- 

 Fische, p. 33). 



Proc. Zool. Soc— 1862, No. IV. 



