. 326 ANNELIDA FROM BERMUDA. 
forms shown in Figs. 73 and 74; these are arranged in two long series. 
After the change of sete (a. €., on the abdominal segments) the uncin? 
remain without modification (Figs. 73, 74); the ventral rami carry a 
few very long capillary sete (Fig. 71), and others with dilated end, 
from the depressed summit of which arises a very delicate capillary 
appendix or apex (Fig. 72); further back both kinds of ventral setz 
become somewhat elongated, and, in particular, the capillary termina- 
tion of the sete with expanded ends doubles in length. 
The body is convex above, flattened below; of uniform width for the 
anterior four-fifths, falling off gradually along the posterior fifth to one- 
half the anterior width. 
The base and cirri of the branchie are purple, except the base of the 
superior cirrus on each side, which is white; pinne, to the outer margin 
of the connecting membrane, purple; then, for a short distance, white; 
next, for a longer distance, purple; followed by another short white 
series. Terminal pinne, purple; naked terminal part of cirri, colorless. 
Where the pinne are white the sides of the cirri are also white, but the 
dorsum of the cirri is always purple. Young specimens have the cirri 
umber-brown or brown, with a tinge of purple; pinnz colorless, white 
or greenish-white. The first segment has its anterior margin white; 
dorsum and sides dark umber-brown; ventral surface, for anterior two- 
thirds same as the dorsum, then a narrow white line, while the posterior 
part of this surface is dark flesh-color. Remaining thoracic segments, 
umber-brown; dorsal rami of this part of the body, dark flesh-color. 
Abdominal segments light flesh-color. On the anal segment two umber- 
brown spots (? eyes) which cannot be made out in preserved specimens. 
This species forms a very tough membranous tube. The description 
given above is largely drawn from notes on specimens found at Beau- 
fort, N. C., in 1876, by the Union College zodlogical expedition of that 
year. Most of the specimens found at Beaufort had their tubes in- 
bedded in fragments of a soft odlite just below low-water mark. Two 
specimens were found with these tubes attached to shells. 
A specimen with something over a hundred segments, measured 
while living, gave— 
Length, 26™™. 
Breadth, 2™™. 
¥rom front margin of collar to tip of branchiz, 5™™. 
Another ‘specim en: 
Length, 50™™. 
Breadth, 35"™. 
