NOETH AMERICAN FRESH-WATER LEECHES. 683 



Clepsine papillifera Verrill. 



Op. cit., vol. iii, p. 130, 1873. 



Body decidedly convex above, broad and obtusely rounded behind; 

 in extension long, slender, and tapering anteriorly. Length, when ex- 

 tended, about 1 inch; greatest breadth, in contraction, about 0.20 of an 

 inch. Back covered with small, distant, subconical papillje, arranged 

 in transverse rows, of which the anterior contain about three papillae, 

 and the posterior ones eight or nine. Head small, narrow, subacute, 

 white in front. Ocelli two, distinct, but close together, black, placed 

 at the posterior edge of the white area. Color above, obscure yel- 

 lowish brown, produced by alternating narrow lines of flesh-color and 

 olive-brown, which are crossed by fine longitudinal lines of dull olive- 

 green, giving a checkered appearance under the microscope. The dorsal 

 papillae are specked with opaque white at the tips, and usually sur- 

 rounded by a darker spot of olive-green at the base. 



Var. b. — Specimens taken in Whitneyville Lake, October 4, carrying 

 young, differ considerably from the i^receding, and may prove distinct. 

 These have the form of body, head, and ocelli as described, but the 

 tubercles of the back are less numerous, forming a single median row 

 anteriorly, which becomes double posteriorly, where there is also a row 

 on each side, midway between it and the margin. The general color 

 above is dull greenish yellow, transversely and longitudinally lined with 

 lighter ; the tubercles are dark brown, and small flesh-colored spots are 

 scattered over the back, but form rows posteriorly. Lower surface 

 lighter. 



Var. c. — The specimens thus designated in my former i)aper appear 

 to belong rather to C. ornata. 



Var. d, liiieata, nov. — Body in contraction broad-oval, much de- 

 pressed. Ocelli two, distinctly separated by a space equal to about twice 

 their diameter. The alcoholic specimen has about twelve longitudinal 

 stripes of deep brown, alternating with as many of yellowish white ; 

 both crossed by fine transverse lines of whitish. Back nearly smooth, 

 with only a few minute and but slightly raised papillae. This may prove 

 to be a distinct species. 



Var. e, caritiatu, nov. — Body in contraction rather short and thick, 

 tapering rapidly to the head. Ocelli two, conspicuous, well separated, 

 with a space between equal to their diameter, or greater. Back with 

 three conspicuous carinae, each surmounted by a close row of prominent 

 papillae; toward the posterior end, the middle carina ceases, and a short 

 one, with few papillae, is introduced on each side of the median line 

 close to the posterior end of the body ; other much smaller papillae are 

 usually scattered over the surface between the principal rows, especially 

 near the margin, where they often form a submarginal row. Color, of 

 alcoholic specimens, dull brown ; the back covered with many narrow 

 longitudinal stripes of dark brown, alternating with lighter lines. 



West River, Conn., and in small tributary streams, among the stems of 



