THE POLYCHjETOUS ANNELIDS OF PORTO RICO. 
201 
Setae of two kinds. Dorsal ones simple, long, smooth, curving gradually to an acute point. 
Ventral ones compound, the terminal articulations long, tapering, slightly curved, with minute 
denticulations on their concave edge. There are no gills. 
Collected from Arroyo. 
Glycera tesselata G-rube. 
Glycera tesselata Grube, Archiv. f. Naturgesch. Jhrg. 29, 1863. Quoted from Ehlers, Die Borstenwiirmer, p. 655, pi. 24, figs. 
2, 9, 33, and 34. 
Collected from stations 6055, 6066, Ensenada Honda (Culebra), Puerto Real. 
GONIADA Aud. et Milne-Ed. 
Goniada oculata, n. sp. 
Head of ten segments. A pair of eyes in first and in anterior portion of eighth. Tenth segment- 
carrying four tentacles. (Fig. 50.) Basal joint of tentacle longer than tenth segment and nearly as 
great in diameter. Terminal joint of tentacle small, rounded. Length of 60 segments, 15 mm. ; width, 
1 mm. Anterior parapodia uniramous, with rounded-flat dorsal and ventral cirri. Dorsal cirrus a 
little shorter than the parapodium; ventral cirrus somewhat longer (fig. 51). At about the thirty-sixth 
segment the dorsal ramus appears (fig. 52). This is small, with a very few stout setss. Setse of ventral 
ramus compound (fig. 53, of a lateral seta). Terminal joint of medium ones much shorter than those 
of the lateral. Color, light brown. On ventral surface a red spot in center of each segment. 
Figs. 50-53 . — Goniada oculata. Fig. 50, Head, x 26. Fig. 51, Parapodium, x 100. Fig. 52, 
Posterior parapodium, x 87. Fig. 53, Seta, x 163. 
This seems closely related to G. gracilis (Webster, Annelids of Provincetown, U. S. F. C. Rept,. 1881, 
p. 723. Eone gracilis Verrill, Invert, of Vineyard Sound, p. 596), but differs in having antennae with two 
instead of three articles, in greater number of segments in the head, and in the larger size of the eyes. 
Collected from station 6064. 
Family ARICIIILE. 
ARICIA Sav. 
Arieia cirrata, n. sp. 
Head acute, without eyes (fig. 54) . Buccal segment as long as first two segments. Body narrow 
anteriorly, rapidly widening so that posterior end is nearly four times breadth of anterior. Flat dorsally, 
rounded ventrally. Dorsal portion of first sixteen segments with very broad space between parapodia 
of the two sides. At about the sixteenth segment this space becomes very much narrower. 
Anterior parapodia small, with dorsal bundle of long, delicate, toothed setae and a ventral vertical 
row of very stout, brown, slightly curved setae. A few capillary, like the dorsal setae, are found among 
these (fig. 55). Farther back this ventral row is replaced by a prominent, cylindrical, ventral ramus 
(fig. 56). In one specimen this change occurred on the seventeenth, in another on the fourteenth, 
and in another on the twentieth setigerous segment. Both rami carry long, delicate, capillary setae, 
though they may be absent from the ventral ramus. I believe that they are normally present, but 
