1862.] DR. A. GUNTHER ON THE BRITISH CHARRS. 49 
I have described and figured, I have found only fifty-nine vertebrze 
—a number stated also by Yarrell. A difference of eight vertebre 
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 of Salmo alpinus “‘ plusieurs Truites rapportées de Norvége 
par Noél de la Moriniére, ou de Suéde 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 Charr 
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. 
Satmo campsricus (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 exceeds 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 interorbital space; the latter is flat, with the median 
* Salmo umbla (Lake of Constance) has sixty-five vertebrae (Rapp, Bodensee- 
Fische, p. 33). 
Proc. Zoou. Soc.—1862, No. IV. 
