682 EEPORT OF COMMISSIONER OF FISH AND FISHERIES. 



posteriorly, and- a few others scattered over the surface between. The 

 most papillose specimens were collected by Dr. Elliott Coues, 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. d. — The largest specimen that I have seen belonging apparently 

 to this species was over 3 inches long in extension, and upward of half an 

 inch wide. The body was strongly annulated, with crenulated margins ; 

 on each annulatiou there was a transverse row of numerous small but 

 conspicuous papillae. Ocelli united. The color was dark olive and fus- 

 cous brown on the back, with a row of small, semicircular, light yellowish 

 spots along each margin at every third annulation; head with an inter- 

 rupted pale yellow vitta; ventral surface striped with olive green and 

 dull grayish. This specimen was taken, without eggs or young, near 

 New Haven, about the 1st of May. 



Another somewhat similar specimen, from the same locality, was 3 

 inches long in extension, and 0.5 to 0.75 broad ; in contraction, 1.5 

 long and 1 inch broad. Body much depressed, with thin margins, ob- 

 tuse anteriorly. Back covered with numerous small, unequal, conical 

 or rounded verrucse, arranged in transverse rows of twenty or more on 

 each annulatiou. Ocelli black, confluent, or very closely approximate. 

 Head, in front of ocelli, brownish white, with lateral brown spots; be- 

 hind the ocelli, with a short median orange-brown stripe. General color 

 of body dark greenish brown. The ground-color is brown, varied with 

 very numerous minute stellate specks of dark green ; toward the lateral 

 margins of the bod3^ and edges of the acetabulum, the color is lighter 

 orange-brown, with fewer green specks; and a marginal series of round- 

 ish pale brown spots extends along each side and around the acetabu- 

 lum ; beneath, pale bluish, with sixteen to twenty stripes of green. 



On the lower side, the dark brown viscera show very distinctly, through 

 the integuments, eleven branches or lobes on each side ; these are elon- 

 gated, well separated, with few short open branches ; the anterior ones 

 are but little shorter and are not crowded. In this respect, this species 

 is very distinct from C.picta, in which the branches are twenty or more 

 on each side, short, much branched, crowded, the anterior ones becom- 

 ing much smaller and more crowded. 



Var. a. — West River and Whitneyville Lake, New Haven — A. E. Yer- 

 rill. 



Var. h. — Pools near Gofife street, New Haven, on submerged wood, 

 and adhering to the ventral surface of Alacrohdella decora — A. E. Ver- 

 rill ; Clear Lake, Colorado, Hay den's expedition ; Snake River — Dr. J. 

 Curtis, Wheeler's expedition ; Birchwood Creek, Nebraska — O. Harger, 

 Yale scientific expedition, 1873; No. 183 — Dr. Yarrow, Wheeler's expe- 

 dition. 



Var. c. — Northwest-boundary survey — Dr. Elliott Coues. 



Var, d. — Pools near Goffe street, New Haven — A. E. Verrill. 



