THE LOCHLEVEN TROUT. 307 



lighter ; gill-cover with nine round dark spots ; body above the late- 

 ral line with seventy spots ; below it ten ; dorsal fin thickly marked 

 with spots of a similar kind ; anterior extremities of the anal and 

 dorsal fins without the oblique dark bands which are so conspicuous 

 and constant in many individuals of S. Fario. First dorsal fin placed 

 half-way between the point of the upper jaw and a little beyond the 

 fleshy portion of the caudal extremity of the body ; all the rays 

 branched except the two first ; the third ray the longest, equalling 

 the length of the long caudal ray; the seventh as long as the base of the 

 fin ; the last considerably more than half the length of the third, equal- 

 ling the length of the middle caudal ray ; fin even at the end (in many 

 specimens it is concave, with the last ray longer than the preceding 

 one.) Caudal fin crescent shaped, the middle ray rather more than half 

 the length of the longest ray ; third ray of the anal fin the longest, 

 equalling the length of the fifth dorsal ray ; the last ray as long as 

 the base of the fin, ventral fin equalling the length of the fifth ray of 

 the anal ; the third ray the longest ; third ray of the pectorals equal- 

 ling the length of the long caudal ray ; the last ray half the length 

 of the fin. Teeth stout and sharp, curved slightly inwards; thirty- 

 two in the upper jaw, eighteen on the lower ; twelve on each pala- 

 tine; thirteen on the vomer; and eight on the tongue. Scales small 

 and adherent, twenty-four in an oblique row between the middle 

 dorsal ray and the lateral line ; flesh deep red ; cseca eighty. Num- 

 ber of fin rays — 



lstD.12; P. 12; V. 9 ; A. 10; C. 19. 



This fish is considered by most writers on British ichthyo- 

 logy to be identical with Salmo Jario or common trout, 

 differing from it only in the colour of the flesh, and in hav- 

 ing no red spots on the sides. It is true that food and sea- 

 son may have a great share in diminishing or increasing the 

 external markings and colour of the flesh;* but they can 

 have no effect in shortening or lengthening the rays of the 

 fins, or in adding numbers to the caecal appendages. 



The differences that exist between S. ccecifer and S. Jario 

 are very striking. The pectorals in S. ccecifer when expanded 



* James Stuart Menteath, Esq. of Closeburn, caught a number of small 

 river trout, and transferred them to a lake (Loch Ettrick) where they grew 

 rapidly ; their flesh, which previously exhibited a white chalky appearance^ 

 became in a short time of a deep red, while their external appearance re- 

 mained the same from the time they were first put in. 



