59 FISHES OF THE CONNECTICUT LAKES. 
July 16: In a spring rivulet tributary of main inlet not far above 
its mouth, several were caught, 2 of which, 2.37 and 2.08 inches long, 
respectively, were saved. ‘Their stomachs contained blackfly larve, 
insect fragments, and insect eggs. 
July 18: In the same rivulet another specimen 2.08 inches long 
was taken. Its stomach was empty. 
August 10: In Alder Brook, directly tributary to the lake, 4 were 
caught, measuring 2.08, 2.06, 2, and 1.87 inches long, respectively. 
Their stomachs contained blackfly larve, insects (head and wings), 
and mosquitoes. 
18. Trout. Salvelinus fontinalis (Mitchill). 
Plate xIt1. 
The trout is so well known and varies so much in structure, shape, and 
color, that a detailed description is hardly necessary. But for comparison with 
the small brown trout a brief outline of the distinctive characters is given, 
drawn from a male specimen, collected at the same time and place as the 
brown trout. It is a typical “ brook trout,” 6.66 inches long. 
Head 4.42 in length without caudal; depth 3.42; eye 5.25 in head; snout 4.20; 
maxillary bone 1.9; branchiostegals 10 on right side and 11 on left; gillrakers 
very short and rather stout, 6+10 on each side; dorsal 9; anal 8; scales about 
225. Head bluntly conic, mouth rather large, distance from tip of snout to 
posterior extremity of maxillary 1.61 in head; mandible 1.44; eye moderate, 
distance between the eyes rather broad, 3.23 in head; body rather slender, 
slightly compressed ; lateral line with about 118 pores; caudal peduncle rather 
deep and compressed; dorsal moderate, when depressed the tips of first rays 
not nearly reaching tips of last, 2.25 in head; base 2.1; anal falcate, the first 
rays longest, 1.61 in head, when depressed reaching far beyond the tip of last 
rays, base 2.62 in head; pectoral moderate, 1.68 in head; ventral 1.9. 
Head and body to some distance below lateral line brownish olive; vermicu- 
lated on top of head and back with yellowish markings; sides iridescent, bluish 
and green, with large yellow spots and some smaller red spots surrounded 
with pale blue aureola; lower jaw creamy white; throat and branchiostegals 
dusky; belly much punctulated with dusky, causing an irregular clouding, con- 
forming somewhat to the dark parr marks, 7 of which cross the sides; lower 
three-fourths of dorsal with large black spots arranged in irregular rows, 
sometimes coalescing, giving, with the lighter ground color, a vermiculated 
appearance to the latter; upper margin of fin straw with indistinct spots; 
pectoral, ventral, and anal orange, with first ray white, bordered by black 
within: adipose dusky, tipped with yellow; caudal orange and olive, finely 
barred with wavy marking. 
This fish is very generally known as “ trout.” Sometimes to dis-- 
tinguish it from the laker it is designated as “ squaretail,” and from 
black-spotted fish of the salmon family as “redspot.” It is 
also called “brook trout,” especially when occurring in_ brooks. 
‘“ Speckled beauty ” is a pet name almost too hackneyed for repeti- 
tion here, and “ speckled trout ” is not distinctive. 
This trout is indigenous to most suitable waters from Nova Scotia 
to Labrador, throughout. New England, northern New York, and 
the Great Lakes region, west to the Saskatchewan, and in the moun- 
