114 PHYSOSTOMI. 



Variety ci— Salmo Grayii, Plate CXIX, fig. 1. 



Salmo Alpinus, Dubourdieu, Hist. Co. Antrim, i, p. 119; Thompson, Ann. 

 Mag. Nat. Hist. 1840, vi, p. 448. 



Salmo Kmbla, Thompson, 1. g. p. 439 (young) and Nat. Hist. Ireland, iy, p. 160. 



Salmo Orayi, Giintlier, Proc. Zool. Soc. 1862, p. 51, pi. vii, and 1863, p. 12, 

 and Catal. Fish. Brit. Museum, vi, p. 136 ; Houghton, Brit. Freshwater Fishes, 

 p. 139, c. fig. 



Gray's charr, Couch, Fish. Brit. Isles, iv, p. 267, pi. ccxxiv. 



D. 13-14 (J-f ^) 1 0, P. 13-14, V. 9, A. 12 (|), 0. 21, L. 1. 125-140, L. tr. 31/30, 

 Cceo. pyl. 37, Vert. 60. 



Lower jaw feeble. Teeth — small, 4 on each premaxillary and about 16 on 

 each maxillary. Fiiis — Dorsal commences slightly nearer the snout than in the 

 other forms, the fin being in the centre of the length of the back. Pectoral 

 terminates at no great distance from the ventral : fins well developed. Scales — 

 19 rows from the hind edge of the adipose dorsal fin downwards and forwards to 

 the lateral-line : 25 rows between the lateral-line and the base of the ventral fin : 

 125 to 140 rows along the lateral-line. Colours — sides with orange dots : fins with 

 or without a light edge. 



Thompson observes of the charr of Lough Melvin, that " the males are 

 generally more gracefully formed than the females, and most of them are rather 

 brighter in colour, but there is no external character so strikingly different as to 

 lead to a certain knowledge of the sex : some of the largest finned are females." 

 They are termed "fresh-water herrings " in Lough Melvin. When cooked the 

 flesh is pale and its taste insipid. 



Breeding. — Mr. Houghton received some from Lough Melvin in November, the 

 males had not parted with their milt, nor the females with their ova. 



The example figured is from a male in the British Museum collection, 

 10'2 inches in length. 



Variety e.— Salmo Colli, Plate CXVIII, fig. 2. 



Salmo Colli, Giinther, Proc. Zool. Soc. 1863, p. 12, pi. and Catal. Fish. Brit. 

 Mus. vi, p. 138; Houghton, British Freshwater Fishes, p. 138, c. fig. 

 Coles charr, Couch, Fish. Brit. Isles, iv, p. 269, pi. ccxxv. 



D. 13-14 (JVo) I 0, P. 13, V. 9, A. 12 (f), C. 19, L. 1. 125-128, L. tr. 

 31/30. Coec. pyl. 42, Vert. 63. 



Teeth — very small, 4 to 6 in each premaxillary, 14 to 17 in each maxillary. 

 Fins — Pectoral not reaching nearly to the ventral. Ventral and anal fins with a 

 narrow white anterior edge. Scales — 125 rows along the lateral-line, and 160 

 descending to it : 18 rows between the hind edge of the adipose dorsal fin and the 

 lateral-line : and 25 from the latei'al-line to the base of the ventral fin. 



The form of S. Colii appears to be principally distinguished from S. Orayi by 

 the comparative shortness of its pectoral fins. 



The figure is from a male example, 8'2 inches in length, in the National 

 Museum, from Lough Eske (Esk or Yesh, "a fish"), the crater of an extinct 

 volcano. It is also found in L. Dan. 



B. x-xi, D. 12-14 (/.T*o) I 0, P. 12-14, V. 9-10, A. 11-13 (/V'o) C. 19-21, L. 1. 

 125-145, L. tr. 31/30, Coec pyl. 28-62, Vert. 59-63. 



Length of head 4f to 5j, of caudal fin 6 to 6-^, height of body 4^ to 5^ in the 

 total length. Eyes—Bize depends much on age, sex, and nature of locality 

 from whence procured : usually situated just in front of the middle of the length 

 of the head, from Ij to 2 diameters from the end of the snout and the same 

 distance apart. In some the comparative height of the body is much greater than 

 in others, and dependant on food, health, and the vicinity of the breeding season, 

 the kelts becoming emaciated. The maxilla in some extends to beneath the last 

 third of the orbit, in others to beyond the vertical from its hind margin, while it 



