NORTH AMERICAN FRESH- WATER LEECHES. 679 



Hake-white spots are scattered over the upper surface, and arrang'cd in 

 about five irregular longitudinal rows. Acetabulum varied with green 

 and orange, the green forming rays toward the margin, alternating with 

 salmon-colored spots. Lower surface darker tlian the up[)er ; deep 

 greenish on the central part. 



Another variety agrees in most respects with the preceding, bnt has 

 a median, brown line along the back, interrupted by six irregular light 

 green blotches, the last one largest and elongated, the rest of the back 

 I)urplish brown varied with greenish, the colors appearing as if in fine 

 checks, owing to lighter and darker lines running in both directions ; a 

 row of 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. Acetabulum varied with 

 light purple and flesh-color. Lower surface pale bluish, with lighter lines. 



A young specimen, about 0.75 of an inch long, had the same pattern of 

 color, but the upper surface was lighter, reddish brown, and the dark 

 brown lobes of the intestine were visible through the integuments. 



Other variations of color were observed. In some, the blotches inter- 

 rupting the median brown line were dull orange, and the marginal 

 si)ots were orange-yellow. Tlie sides of the back were orange-brown, 

 thickly specked with dark brown and with a row of small pale green 

 spots on each side ; lower surface plain purplish brown, and there was 

 a whitish spot in front of the ocelli. 



Whitneyville Lake and West River, near JSTew Haven ; common on 

 submerged or floating wood, and beneath dead bark, in stagnant i)ools 

 near Kew Haven, April 20, 1873, without eggs or young — A. E. Verrill. 



Clepsine modesta Verrill. 



Op. cit., p. 129, fig. 2, 1872 ; vol. v, p. 388, 1873 



Clepsine stibmodesta Nicholson, Caiiadiiin .Journal, 1873. 



Body in extension elongated, tapering and very slender anteriorly, 

 broader and obtusely rounded posteriorly. Tig^-i 



Length, 0.5 of an inch in extension. Back 

 smooth, faintly annuiated, transhicent. Head 



small, obtuse, whitish. Ocelli two, black, near """ "^^i 



together. The general color above is usually pale purplish brown or 

 purplish flesh-color, with minute specks of brown and very small round 

 spots of dull yellow, and often of light green ; margins and a median 

 dorsal line, pale. Acetabulum moderately large ; Avhitish. Auditory 

 vesicle or "cervical gland," placed near the head, small, rounded, slightly 

 prominent, conspicuous, deep brown, surrounded by a wliitish circle. 

 Lower surface pale purplish. The attached young, about 0.3 of an inch 

 long in extension, were slender, whitish, and subdiaphanous, with the 

 brown intestine showing through posteriorly. 



West River and Whitneyville Lake, with the preceding, and carrying 



