A. E. Verrill—North American Fresh-water Leeches. 129 
Another variety agrees in most respects with the preceding, 
but has a median brown line along the back, interrupted b 
about six, irregular, light green blotches, the last one largest 
and elongated; the rest of the back purplish brown, varied 
with greenish, the colors appearing as if in fine checks, owing 
to lighter and darker lines running in both directions ; a row o 
rounded light green spots on each side, midway between the 
dorsal line and margins, and a row of flesh-colored, semicircular 
spots, alternately large and small, along the margin. Acetabu- 
lum varied with light purple and flesh-color. Lower surface 
pale bluish with lighter lines. 
. 
oung specimen, about °75 of an inch long, had the same 
through the integuments. 
Other variations of color were observed. In some the 
blotches interrupting the median brown line were dull orange 
and the marginal spots were orange-yellow ; the sides of the back 
were orange-brown, thickly specked with dark brown and with 
interrupted, and the back was finely variegated with green, 
orange, and flesh-color, the green in stellate specks, with a 
row of small white spots on each side; the marginal spots pale 
orange-yellow. 
Whitneyville Lake and West River, near New Haven, com- 
mon, on submerged or floating wood, and beneath dead bark,— 
A. KE. Verrill. 
Clepsine modesta, sp. nov. Figure 2. 
Body in extension elongated, tapering and very slender an- 
teriorly, broader and obtusely rounded posteriorly. Length 1 
Inches in extension. Back smooth, Fig. 2. 
faintly annulated, translucent. Head 
small, obtuse, whitish. Ocelli two, “= 
black, near together. The gene 
color above is pale purplish brown, 
or purplish flesh-color with minute ks of brown, and very 
small round spots of dull yellow, and often of light green ; mar- 
gins and a median dorsal line pale. Acetabulum moderately 
large, whitish, Auditory vesicle or “cervical gland” placed 
near the head, small, rounded, slightly prominent; conspicuous, 
deep brown, surrounded by a whitish circle. Lower surface pale 
purplish. The attached young, about 3 of an inch long in ex- 
tension, were slender, whitish, and sub-diaphanous, with the 
brown intestine showing through posteriorly. 
Am. Jour. Sc.—Tutrp Series, VoL. III, No. 14.—Fes., 1872. 
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A 
