Arthur. — Notes 071 some Specimens of migratori/ Salmonidse. 181 



premaxillary projects slig'htly over mandible. Opercula rounded in outline, 

 margin of subuperculum projecting beyond general outline of gill-covers, 

 suboperculum very large relative to the other opercula, and approaching a 

 sector of a circle in shape ; preoperculum crescent-shaped, somewhat sinuous 

 in outline, with a distinct rounded lower limb. Fins small relatively to size 

 of body, tail very large and finely forked. 



Colour: Head hght brown, black back, sides and belly white, with faint 

 pink or flesh tint on belly ; bright strong silvery scales, rather large, all over 

 the body. Dorsal fin brown, adipose blackish brown, pectoral white with 

 black edge and tip ; ventral and anal fins white ; tail brown with black tip 

 or margin. No spots visible anywhere. Lateral line distinct, but not raised 

 or coloured. Flesh dark vermilion. 



Dimemions: Weight 6 lbs. (before curing probably 7^ lbs.), length to 

 origin of caudal fin, 21^ in., to fork, 23iin., total 24^in. ; depth 6 in. ; 

 giith 14in. ; head 5jin. ; tail, width 5|in., longest ray 4 in., shortest 

 liin. 



Fin rays : D.ll, P.15, V.IO, A.15, C.19. 



Branchiosteyous rays : 13. Vertebra. : 60. 



Length of fins : D.2^, P.3i, ¥.2^, A.2i m. 



Teeth : Very fine along body of vomer, on palatines and maxillary (head 

 of vomer missing) ; coarser on tongue and on mandible, particularly towards 

 the snout. 



Scales : Bright, large and transparent, 15 to 16 in transverse row from 

 adipose back to lateral hne. L. lat. 140, L. trans. f£. 



Note. — Owing to tissues being somewhat decayed, the teeth and scales 

 could not be correctly examined or enumerated. 



3. Sahno trutta. This specimen was caught in the Frith of Clyde, and 

 was sent to me preserved in spirits by an old friend and enthusiastic angler, 

 Geo. Maclachlan, Esq. It reached me in November, 1878, by the " Timaru." 

 General description : A female, in fair condition, but evidently not come 

 to maturity : back sHghtly arched, but shape of fish somewhat distorted by 

 packing in a bottle ; of a dark slate colour on back, passing into cream colour 

 below the lateral hne, and white on belly. The characteristic silvery scales 

 present all over the body ; the lateral line being black, distinct and raised, 

 much more conspicuous and well defined than in any S.fario. Scales com- 

 pared with those of common trout of same weight, and found to be only 

 half the size and clear in colour, (scales of S.fario dark on posterior half). 

 Black spots .r-shaped, not numerous, and situated mostly above the lateral 

 line ; one rouud black spot on upper part of operculum ; one or two indis- 

 tmct on dorsal fin, none on adipose or tail. Head : finely shaped, one-fifth 

 of extreme length of fish, small and sharp at the snout ; maxillary flat and 



