48 FISHES OF THE CONNECTICUT LAKES. 
17. Brown Trout. Salmo fario Linneus. 
Head 3.8 in length; eye 5 in head; snout 3.7; distance from tip of snout to end 
of maxillary 1.8; distance from tip of snout to end of maxillary bone 2.35; 
gillrakers 5+11; branchiostegals 10; dorsal 10; anal 9; longest dorsal ray 1.5 
in head; longest anal ray 1.6; longest pectoral ray 1.44; scales 140. 
Body comparatively short and stout; head moderate; eye small; mouth large; 
maxillary reaching beyond eye; caudal peduncle deep, about 2.5 in head; origin 
of dorsal fin slightly nearer tip of snout than base of caudal, its outer edge 
straight; caudal fin nearly truncate, slightly emarginate in small examples; 
anal similar to dorsal, its posterior base directly under posterior base of adipose 
fin; origin of ventrals under last third of dorsal, tips not reaching vent; pectoral 
moderate, falcate. 
General color in life, top and side of head and back as far down as lateral 
line light olive with metallic lustre; side of back and side, as far as lateral 
line, with black and dark brown spots; top of back without spots; below lateral 
line to level of ventral fins light olive and light golden yellow; belly white; 
large black spot on preopercle and several smaller black spots on opercle; along 
sides, immediately above and below lateral line, light orange spots, ocellated 
Fic. 4.—Brown trout. 
with very pale blue; dorsal fin with numerous black spots, fin grayish olive, 
tip of first 3 or 4 rays lighter gray; other fins yellowish olive; first ray of anal 
white, margined posteriorly with dusky streak; no spots on caudal; adipose fin 
plain; tips of jaws dusky; throat and under part of lower jaw white; parr 
marks evident at times, about 11 in number; very faint large dusky spots below 
posteriorly. 
Description from male specimen 9 inches in total length. 
Distinguished from the common trout by having spots on the back instead of 
wavy markings or rivulations, and the vomer with teeth on the shaft, not in a 
group at the head as in the common trout. Distinguished from salmon by the 
presence of white margins to ventral and anal fins. 
The “ brown trout,” “ German trout,” “German brown trout,” or 
“von Behr trout ” is the common brook trout of Europe. In Great 
Britain it is the “brown trout” or “ yellow trout.” It was intro- 
duced into this country from Germany in 1883, according to Bean %, 
through the instrumentality of Herr von Behr, president of the 
Deutscher Fischerei Verein: 
“Bean, T. H. Fishes of New York. Bulletin 60, New York State Museum, 
19038, p. 256. 
