1. SALMO. 95 



irregularly rounded black sijots in moderate number, and with a few 

 black ocelli, each with a red centre. Dorsal fin with small black 

 spots ; the other fins blacldsh. 



21. Salmo stomachicus. 



The Gillaroo. 



Barmujton, Philos. Trans. 1774, vol. 64. p. IIG; Waison, ibid. p. 121 • 



Htinter, ibid. p. 210; Owen, Cat. Phjs. Ser. Coll. Surf/, i. p. 141 ; 



Tho7nj)smi, Nat. Hist. Ireland, iv. p. 154 ; Soiverh/, Brit. Misce/l. 



t. 61 ; Yarrell, Brit. Fish. 3rd edit. i. p. 283 ; Cottch, Fish. Brit. Isl. 



IV. p. 240, pi. 219. 



D. 15. A. 12-13. P. 13. V. 9. L. lat. 125. L. transv. 28/33. 

 Caec, pyl. 44. Vert. 59-60. 



Head well proportioned in its shape, and rather small when com- 

 pared with the body; body rather compressed and deep. The pos- 

 terior point of junction of operculum and suboperculum is nearer to 

 the lower anterior angle of the suboperculum than to the upper end 

 of the gill-opening ; prseopcrculum with a rather distinct, but very 

 oblique lower limb. Snoiit rather obtuse. Maxillary much longer 

 than the snout, strong and much dilated ; in specimens 6 inches long 

 it reaches beyond the centre of the orbit, and in others, 14 inches 

 long, it does not quite extend to the vertical from the hind margin 

 of the orbit. Teeth small ; vomer with a very small triangular head, 

 and with the teeth of its body disposed in a double scries, and per- 

 sistent throughout hfe. Fins well developed, not rounded ; the 

 pectoral is pointed, its length being more than one-half of its distance 

 from the root of the ventrals. The caudal fin has always the lobes 

 pointed, is emarginate, and appears truncate only when stretched to 

 the utmost extent. In specimens 14 inches long the middle caudal 

 rays are a little more than half as long as the outer ones. The hinder 

 part of the tail is much compressed and rather deep. There are from 

 twelve to thirteen scales in a transverse series descending from behind 

 the adipose fin to the lateral Line. 



Back and sides with numerous reticulated black spots, between 

 which rod ones are interspersed on and below the lateral line. 

 Dorsal with ovate black spots ; dorsal, anal, and caudal with a whitish 

 margin. 



The membranes of the stomach are conspicuously thicker in this 

 species than in its congeners ; but more so in adult examples than 

 in young ones. It feeds exactly on the same shells (Limncms, An- 

 cylm) which are frequently found in other species without this pe- 

 cuUarity of the stomach. 



Lakes of Ireland, 



a, b, c. Many examples from 6 to 14 inches long : not in good state. 

 Lough Melvin. Presented by the Earl of Enniskillen. 

 _ The following specimens from Lough Earne probably belong to a 

 distinct species ; but our materials are, at present, not sufficient to 

 introduce it under a new name. The smaller examples were received 

 without intestines; so that we cannot decide whether the great 



