238 SALMONID^ OP BRITAIN. 



Salmo umbla, Jenyns, Brit. Vert. p. 427 ; Thompson, Ann. and Mag. 1840, vi, 

 p. 430. 



Salmo Willughhii, Giinther, Proc. Zool. Soc. 1862, p. 46, pi. y, 1863, p. 11, and 

 Catal. vi, p. 131 ; Day, Brit, and Irish Fish, ii, p. 113, pi. cxvii, f. 2. 



Salmo struanensis, Gibson-Maitland, Field, Oct. 8th, 1881, p. 516. 



Willoughhy' s cJiarr, Conch, Fish. Brit. Isles, iv, p. 262, pi. ocxxii. 



Variety. Loch Killik Chae.* 



Salmo Mllinensis, Giinther, Proc. Zool. Soc. 1865, p. 699, pi. xl, and Catal. vi, 

 p. 130 ; Honghton, Brit. Fresh-water Fish. p. 145, c. fig. ; Day, Brit, and Irish 

 Fish, ii, p. 113, pi. cxviii, f. 1. 



? Salmo arcturus, Giinther, Proc. Zool. Soc. 1877, p. 294, pi. xxxiii. 



Variety. Geats CflAE.f 



Salmo alpinus, Dnbonrdien, Hist. Co. Antrim, i, p. 119 ; Thompson, Ann. Mag, 

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



Salmo umbla, Thompson, 1. c. p. 439 (young) and Nat. Hist. Ireland, iv, p. 160. 



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

 and Catal. Fish. Brit. Mnsenm, vi, p. 136 ; Houghton, Brit. Fresh-water Fishes, 

 p. 139, c. fig. ; Day, Brit, and Irish Fish, ii, p. 114, pi. cxix, f . 1. 



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



Variety. CoLES Chae.J 



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

 Mus. vi, p. 138; Houghton, British Fresh- water Fishes, p. 138, c. fig. ; Day, Brit, 

 and Irish Fish, ii, p. 114, pi. cxviii, f. 2. 



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



B. x-xi, D. 12-14 (J^) I 0, P. 12-14, V. 9-10, A. 11-13 (-JtV) C. 19-21, L. 1. 

 125-145, L. tr. 25-31/30-40, Caec. pyl. 28-62, Vert. 59-63. ■ 



* D. U (s^) I 0, P. 13, V. 9, A. 13 (t^), C. 19, L. 1. 135, Vert. 62, Ccec. pyl. 44-52. 



Length of head 4J, of caudal fin 6i, height of | body 4J in the total length. Eyes — diameter 

 about 1/6 of the length of the head, 2 diameters from the end of the snout, and also apart. Form 

 of preoperole varies in different specimens ; suboperole mostly short and high. MaxiUa reaches 

 to behind the orbit. Teeth — small. Fins — dorsal, pectoral, and ventral well developed. Scales — 

 Dr. Giinther counts 180 rows descending on to the lateral-line ; in an example examined there 

 were 185 pierced scales along the lateral-Kne. Colours — dart, sides with fevf light spots. In some 

 the anterior edges of the lower fins are Hghtly coloured. S. arcturus, Giinther, the most northern 

 Salmonoid recorded N. lat. 80° 28' by 34' is differentiated from S. Mllinensis owing to its being a 

 little more slender 1 Malmgren (^fv. Sven. Vet. Akad. Pork. 1865, p. 534) remarked upon an 

 example of Salmo alpinus, -76 mUlim long, found in a river in Northern Spitzbergen. 



t D. 18-14 {i\%) I 0, P. 18-14, V. 9, A. 12 (f), C. 21, L. 1. 125-140, L. tr. 31/80, Cac. pyl. 37, 

 Vert. 60. 



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

 Fins — 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 beween 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 observed of the char of Lough Melvin, that "the males are generally more grace- 

 fully 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 fiined are females." They are termed "fresh-water herrings " in Lough Melvin. When 

 cooked the flesh is pale and its taste insipid. As to their breeding, Mr. Houghton received some from 

 Lough Melvin in November, the males hadnot parted with their milt, nor the females with their ova. 



t D. 18-14 (^1^) I 0, P. 13, V. 9, A. 12 (f ), 0. 19, L. 1. 125-128, L. tr. 31/30. Cffic. pyl. 42, Vert. 63. 



Teeth — ^very small, 4 to 6 in each premaxillary, 14 to 17 in each maxiUary. 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 lateral-line to the base of the ventral 

 fin. The form of S. Oolii appears to be principally distinguished from S. Grayii by the compara- 

 tive shortness of its pectoral fins. It has been recorded from Lough Bske (Eskor Yesh, "a fish"), 

 the crater of an extinct volcano, and L. Dan. 



