THE POL YCH.ETOUS ANNELIDS OF PORTO RICO. 
189 
On ventral view of the entire animal a series of black coiled structures may be seen lying one on 
either side the median line in either segment. If the parapodium be cut off, these structures pull out 
of the body, remaining attached to tip of parapodium by a flat expansion. (Fig. 15, ch.r.) Each 
is a chitinous rod, which easily splits up into a number of fine threads. Dissection shows that the 
first septum appears between segments 21 and 22, the coelom in front of that being a continuous cavity. 
This cavity is nearly filled by these rods, which are shorter and much less coiled than they are farther 
back. They lie just above the nephridia, which can be seen below them as slender, short, white 
organs. 
Rami of parapodium almost fused. Dorsal ramus (fig. 15, d. r.) rounded, thin, with a tuft of long 
setae; a few larger than the others, lanceolate at end, with a number of pairs of lateral spines (fig. 16). 
Ventral setae of two kinds; dorsal ones thick, brown, with end obliquely truncated, and covered with 
minute spines. (Fig. 17.) Ventral ones colorless, not more than one-fourth as thick as the dorsal, 
bent at some distance from end, with the transverse diameter somewhat greater at point of bending; 
from the bend to apex covered with transverse rows of minute spines. (Fig. 18. ) 
About 55 of anterior segments preserved in one specimen measured 17 mm. in length, 2 mm. 
broad without parapodia, 4 mm. with parapodia. 
Collected from stations 6059, 6063, and Porto Rico. 
Figs. 14-18 . — Panthalis ocalea. Fig. 14, Head, x 14. Only the left palp Is figured. Fig. 15, Parapodium, x 14; d. r., v. r. 
dorsal and ventral rami; v. c., ventral cirrus; c/t. r., chitinous rod. Fig. 16, Seta of dorsal ramus, x 143. Figs. 17 
and 18, Sets of ventral ramus, x 143. 
EULEPIS Grube. 
Eulepis splendida, n. sp. 
Head rounded, incised in front, unpaired tentacle small, rising from dorsal surface of head, 
reaching scarcely to half the length of the paired; the latter arising from anterior lobe of head, about 
two-thirds as long as head (fig. 19). All antennae conical, with distal two-thirds dark brown, the 
very tip white. Palps long, smooth, white, tapering gradually to the end (fig. 19). No eyes could 
be seen. 
First parapodium with two cirri and two tufts of delicate setae (fig. 20) arising from its surface. 
Parapodium twisted so that the two cirri come to lie very nearly in a horizontal plane. Setae long, 
thread-like, a few with very minute serrations along one border. Other parapodia with very distinct 
rami. Dorsal ramus with about 15 stout, brown, chitinous setae, curved at apex, the curved portion 
pointing backward. Below this is a tuft of fine thread-like setae, some with fine serrations along 
their edges. These are very numerous and of a golden-red color. Ventral ramus broader than dorsal, 
with about 25 long setae. Setae about half the diameter of coarse dorsal setae, curved at apex, the 
curved portion pointing backward. General color of these setae yellowish brown, with tips, as seen in 
reflected light, noticeably lighter. Ventral cirrus ovate with base slightly narrowed, its apex drawn 
out into a terminal joint having much the form of the basal, but very much smaller. Dorsal ramus 
with either a cirrus or an elytrophore (fig. 21). 
Elytra borne on segments 2, 4, 5, 7, etc., 21, 24. Grube, in his diagnosis of this genus (Annu- 
lata Semperiana, p. 51), says that elytra alternate anteriorly, after the manner of the Polynoidee, but 
posteriorly are borne on all segments. In his description of E. hsemifera (loc. cit., p. 52), he notes that 
the elytra are found on segments 2, 4, 5, 7, etc., up to 21; that then they skip first two, then three, 
