THE PQLYCH2ET0US ANNELIDS OF PORTO RIOO. 
187 
Polynoe nodosa, n. sp. 
Body plump, with short parapodia. The specimens with elytra removed are coiled, and look 
not unlike the larva of a coleopterous insect. General body color gray, with dark longitudinal dorsal 
band. In one of the two specimens at my disposal this is due to color of body wall; in the other, to 
the color of minute tubercles which cover it. Whole dorsal surface, even of parapodium, studded 
with small round tubercles. No tubercles ventrally, but surface is studded with fine papillae, 
giving it a villous appearance. Head with lateral edges rounded. Breadth about equal to distance 
from posterior margin to base of antennae. Anterior eyes larger than posterior and situated more 
toward side of head. Antennae longer than head, with terminal swelling and acute tip. Tip of ter- 
minal swelling and subterminal band white; the rest brown. Tentacles not half as long as antennae, 
like the latter in form and color, but lacking subterminal band of white. Tentacular and dorsal cirri 
like antennae. Palps nearly twice as long a ; 
tentacles, tapering slowly to near apex, ending 
abruptly in a sharp point. Basal half colorless, 
terminal half brown. Surface studded with very 
minute papillae, visible only under high power. 
In a smaller specimen, about half the length of 
the above, the palps were uniformly brown and 8 
only a little longer than the antennae. 
Elytra on segments 2, 4, 5, 7, etc. , 23. Whole 
number of pairs, 12. Body segments 27, includ- 
ing anal segment. Only the anterior pair of 
elytra present in either specimen. These were 
nearly square, the edge with a row of fine papil- Fig. 9, Par 
lae, surface studded with tubercles. (See fig. 8. ) 
Parapodium uniramous, very thick, its dorsal surface covered with tubercles. (See fig. 9. ) 
Toward the end, and ventrally, the tubercles are replaced by fine villous-like papillae; dorsally, an 
elytrophore or cirrus. Short, "stout, ventral cirrus. A few (ten) very strong setae, with blunt-pointed 
aipex ; a single large tooth some distance from apex. Basal part striated longitudinally. A single large 
aciculum. 
Length 25 mm; width 5 mm. Of another, length 15 mm., width 3.5 mm. 
Collected from Fajardo and station 6079. 
Polynoe, sp. 
From Mayaguez was collected a fragment, probably a Polynoe, but owing- to loss of the anterior 
segments this could not be determined with certainty. An elevated dorsal ridge marks off three 
distinct areas of the body — a median and two lateral. Surface irregularly marked with light brown 
and gray. Elytra transparent, not covering entire dorsal surface. 
STHENELAIS Kinberg. 
Sthenelais simplex Ehlers. 
Sthenelais simplex Ehlers, Annelids of the Blake, p. 00, pi. 13, ligs. 2 and 3; pi. 14, figs. 1 to 0. 
Ehlers says there are no eyes. These, which agree in all other respects with his diagnosis, show 
a pair of very small dark eyes, one on either side of the base of the antenna. 
Collected from station 6066. 
Sthenelais grubei, n. sp. 
Grube, in his diagnosis of this genus (Annulata Semperiana, p. 54), says that the elytra are borne 
on segments 2, 4,5,7, etc. , alternately to segment 23, and on every segment posterior to that. Schmarcla 
(Neue Wirbellose Thiere, p. 146) states that the alternation ceases on the twenty-seventh segment. 
The specimens here described agree with Schmarda’s description. The head (fig. 10) is rounded, with 
a rather broad median fissure into which the antenna fits. Base of antenna with broad lateral flap, 
narrower at base. Palps as long as first nine segments. 
Elytra white,, semitransparent. First pair broad kidney-shaped; others approximately oval, the 
outer posterior border fringed with a few delicate papillae. As far as segment 27 there is a narrow 
dorsal area not covered by the elytra. 
losa. Fig. 8, Elytron, x 20. 
■apodimn, x 15. 
