1. SALMO. 97 



8 inches long the middle caudal rays are half as long as the outer 

 ones, and in old examples once and three-quarters. The hind part 

 of the body is short and rather high. There are about fifteen scales 

 in a transverse series descending from behind the adipose fin ob- 

 liquely forwards to the lateral line. 



Upper parts dark, with a greenish or reddish hue ; scales on the 

 sides with dark margins and base, silvery in the middle. Sides with 

 round, sometimes ocellated, sometimes reticulated black spots ; some- 

 times a series of red spots along the lateral line. Dorsal with black 

 spots ; vertical fins and outer halves of paired fins black. 



A non-migratory species inhabiting mountain-pools of Wales, also 

 Lough Melvin, Ireland ; readily distinguished from S. fario by its 

 feeble maxillary, uniserial vomerine teeth, long and black pectorals, 

 and more or less emarginate caudal fin. 

 a~f. Males and females, from 7 to 12 inches long. Llyn Beguilin, 



Merionethshire. Presented by Dr. A. Giinther ; caught in the 



month of August. 

 <j~i. Mature male and females, from 7 to 8 inches long. Llyn Gadr, 



Cader Idi-is. Presented by Dr. A Giinther; caught in the 



month of August. 

 1--I. Sterile specimens, probably from the Towey, from which river 



they had been transferred to a freshwater-pond. Presented by 



W. Peel, Esq. 

 m. Many specimens. Lough Melvin. Presented by the Earl of 



Enniskillen. Caught in October; Csec. pyl. 36, 36, 41. Vert. 



58, 59, 59. 

 A deformed example of this species has been figured and described 

 as the "Hog-backed Trout of Plinlimmon" (Cambr. Quart. Mag. 

 1833, July, p. 391). A similarly deformed specimen has been ex- 

 amined by Cobbold (Edinb. New Philos. Journ. vol. ii. 1855, pi. 6). 



Description of a Female specimen from Llyn Beguilin, caught in the 

 month of August; ova considerahlg enlarged. 



inches. 



Total length llf 



Greatest depth of the body 2i 



Length of the head 2^ 



Girth of biggest part of body 6^ 



Least depth of the tail 1 



Girth of narrowest j^art of tail 2i 



Distance between end of snout and eye ^ 



Diameter of the eye f 



Length of the maxillary bone 1 



Distance between eye and angle of praeoperculum . . i 



Greatest width of operculum -^ 



Greatest depth of opercuhmi ^ 



Distance between occiput and origin of dorsal fin ... 3-i- 



Distance between end of dorsal and root of caudal . . 3^ 



Length of base of dorsal 1-^ 



VOL. VI. H 



