34 BRITISH FRESHWATER FISHES 



line, the last two of which are on the operculum ; 

 one or sometimes two of these may be inconspicuous. 

 On the body there are some blackish spots above 

 the lateral line, in some absent posteriorly, in others 

 present also anteriorly below the lateral line ; there 

 is a red spot between each pair of parr-marks, and a 

 few other red spots are usually present. The dorsal 

 fin usually has dark spots arranged in two series, the 

 caudal is dusky, the pelvics and anal pale, the 

 pectorals bluish black except towards the base. The 

 maxillary reaches to below the middle of the eye, 

 the pectoral fin extends to or beyond the vertical 

 from the origin of the dorsal, the longest anal ray, 

 when laid back, reaches at least as far as the last, 

 the middle caudal rays are not more than three- 

 fifths as long as the longest, and the least depth of 

 the caudal peduncle is about one-tenth the length 

 of the fish (to the base of the caudal fin). 



A number of Trout of the same size (PI. VII, 

 Fig. i) were taken with these parr, from which they 

 differ in that the spots are more numerous and more 

 widely distributed, whilst the regular series behind 

 the eye is absent ; the pectoral fin is orange 

 coloured and the anal has a white anterior edge 

 bordered posteriorly by a dark streak. The 

 maxillary extends to below the posterior edge of 

 the pupil, the pectoral does not reach the vertical 

 from the origin of the dorsal, the middle caudal rays 

 are two-thirds as long as the longest, and the least 

 depth of the caudal peduncle is about one-eighth the 

 length of the fish. 



On Plate IV are figured two parr ; the smaller is 

 shown of the natural size, but the larger, a fish of 

 8 inches long, is reduced ; this, and other two-year- 



