ANNELIDA FROM BERMUDA. 325 
Fam. SABELLID. 
PROTULIDES n. g. 
Branchiz united along their inner part by membrane. 
Sete of first segment in an oblique double series. Uncini in two 
series and of two kinds on all segments. Anterior dorsal sete of two 
kinds. Collar complete, save for a narrow dorsal incision ; not reflexed.. 
Ventral sulcus continued on the dorsum. 
This genus is closely related to Potamilla MALMGREN, but differs fron» 
it in the character and arrangement of the sete of the first segment, im 
the continuation of the ventral sulcus on the dorsum, and in having 
two rows of uncini on the abdominal segments. 
PROTULIDES ELEGANS fn. g., n. Sp. 
(Plate XI, Figs. 63-74.) 
The branchial cirri are from nine to fourteen on each side, base form- 
ing a semicircle; they arise from a long undivided basal part, one-half 
as long as the cirri themselves ; pinne elongate, delicate; short terminal 
part of the cirrus without pinne. 
There are two series of minute eye-specks, one about two-thirds of the 
way out on the cirri, corresponding to the space occupied by six or 
seven pinne; another, still further out. These eyes cannot be seen im 
alcoholic specimens. 
Tentacles flattened, triangular, length about one-fourth that of the 
branchie. 
The first segment is double the length of the second, complete save 
for a narrow dorsal incision (Fig. 63). 
There are from six to eight thoracic segments, the variation in num- 
ber not depending on size, as some of the largest specimens have but 
six segments. Posterior segments short; numerous. 
The set of the first segment are in two series, which run obliquely 
from before backward, along the entire length of the segment. Alb 
these sete are dilated at the end, and have a capillary apex; they do 
not ditter from each other much in form (Figs. 64-66); there are about 
forty sete in each row; they barely project from the surface. 
Sete of remaining thoracic segments of four kinds: In the dorsal 
ramus, from 4 to 5 long bi-limbate sete (Figs. 67, 68): below these a 
double series of short sete, with dilated globular extremities (Figs. 69, 
70) without capillary terminations. In the ventral ramus are the twe 
