904 ZOOLOGY— LEECHES. 



of flake-white often extend along each side of the median line on the 

 papilla', and similar white specks are often scattered over the back; lower 

 surface brownish, with stellate specks of green; near the margin like the 

 upper surface. 



Several of the specimens, preserved in alcohol during the breeding sea- 

 son, have a reproductive orihee at the summit of a rather large conical 

 ] imminence, and situated apparently at about the seventeenth annulus 

 behind the mouth. On each side, farther back and midway between the 

 median line and the margins, there is a longitudinal row of about ten pit- 

 like depressions extending back to near the posterior sucker. 



Some of the specimens, which were quite dark colored when caught, 

 in April and early in May, carried large clusters of bright deep yellow 

 eggs, and others were just laying. These dark colored specimens were 

 kept until July 1 7. By that time they had become much lighter, the yel- 

 low, pale orange, and greenish hues prevailing, though stellate specks of 

 dark green and brown were still present. 



Var. c, rugosa. — Larger than the preceding ; strongly annulated, each 

 annulation with a row of twenty to thirty, or more, larger, conspicuous, 

 rough, conical papilla-, with many unequal smaller ones between them in 

 several irregular rows, or scattered. Ocelli very close together, but sepa- 

 rated by a narrow light line, in adult preserved specimens; united in the 

 attached young. The color, in alcoholic specimens, is yellowish-green, 

 variegated with blotches of dark brown; margin of body and acetabulum 

 with semicircular, pale orange spots, covering the width of about two annu- 

 lations, and separated by narrower greenish-brown spots about half as wide; 

 head with a light longitudinal vitta. The attached young have three dorsal 

 longitudinal rows of small papillae, the median one double posteriorly, and 

 a few others scattered over the surface between. 



The most papillose specimens were collected by Dr. Elliott Cones, on 

 the Northwest Boundary Commission. This may prove to be a distinct spe- 

 cies, but this is rendered improbable on account of the close agreement of 

 the attached young with the ordinary varieties. 



Var. (I. — The largest specimen that I have seen belonging apparently 

 to this species was over three inches long in extension, and upward of half 



