298 FISHES OF THE FIRTH OF FORTH. 



Salmo salmulus.* — The Park. 



Specific Characters. — Teeth extending the whole length of the vo- 

 mer ; middle ray of the caudal fin not half the length of the longest 

 ray of the same fin ; fifth ray of the pectorals the longest. (See 

 Plate XXX. 



Description. — From a specimen eight inches in length. Head 

 more than one-fifth of the whole length, caudal included ; depth be- 

 tween the dorsal and ventrals, less than the length of the head ; gill- 

 covers slightly produced at the jDosterior margin ; basal line of union 

 of the operculum oblique ; preoperculum rounded at Its inferior 

 border. Jaws nearly equal; posterior extremity of the maxillary 

 bone in a line under the middle of the pupil. Colour of the back 

 and sides olive-brown, marked by a number of round dark spots ; 

 pectoral, dorsal, and caudal fins dusky ; ventrals and anal rather lighter ; 

 operculum with a large dark spot placed in the centre, and another 

 at the posterior inferior angle ; sides with eight or nine broad trans- 

 verse bands, with an orange-coloured spot between each. First 

 dorsal fin placed half-way between the point of the upper jaw, and 

 a little beyond the base of the centre caudal ray ; the first and se- 

 cond rays simple, the remainder branched, the fourth the longest, 

 rather more than equalling the base of the fin ; the last ray about 

 one-half the length of the fifth ; adipose fin situated in a line over 

 the base of the last ray of the anal fin, and half-way between the 

 dorsal, and the centre of the middle caudal ray. Caudal fin deeply 

 forked, the middle ray not half the length of the longest ray in the 

 same fin ; the fourth ray of the anal fin the longest, equalling the 

 length of the sixth ray in the dorsal fin ; the last ray one-half the 

 length of the fifth, the seventh ray as long as the base of the fin. 

 Origin of the ventral fins in a vertical line under the last ray but six 

 of the dorsal, the fourth ray the longest, more than equalling the 

 base of the dorsal fin. Pectorals rounded at the end, the fifth ray the 

 longest, more than equalling the longest ray of the caudal fin, and 

 as long as the space between the base of the ventral fin and the ori- 

 gin of the first ray of the anal. Teeth small and sharp, forty-eight 

 in the upper jaw ; and twenty in the lower ; twelve on each pala- 

 tine ; six on the tongue, and twelve on the vomer ; scales small and 

 adherent : flesh white. Number of fin rays — 



1st D. 12; P. 13; V. 8; A. 10; C. 19; cfeca 42, but liable to 

 great variation in their number. 



* Salmo salmulus, Penii., .Jen., Yarr., Jar. The largest sjiccinien I have 

 met with, measures nine inches and a quarter in length. It was taken in 

 the North Esk, Forfarshire, September 1}!35, In- .lames Wilson, Esq, 



