208 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Family CHLORAEMIDtE. 
STYLAROIDES Claparede. 
Stylaroides glabra, n. sp. 
A single specimen, to which 1 have given the above specific name, was collected at station 6066 
The head had been more or less mutilated. An outline drawing 
of its present appearance is given in fig. 73. The proboscis had 
been broken away before the drawing could be made, and is 
drawn to twice the same scale as the rest in fig. 74. It is thick, 
with sides much wrinkled and folded over. Sette of first three 
segments long, reaching beyond head. Apparently a greater 
number of setse on first than on succeeding segments, but so 
many of the latter were broken that this is difficult to determine. 
On second and succeeding segments dorsal and ventral setae 
bundles are separated by a considerable space. Dorsal setae much 
smaller than ventral. All setae marked with transverse lines. 
(See fig. 75.) Body covered, except toward the posterior end, 
with a thin, transparent shell, in which are embedded numer- 
ous fine grains of sand. Anteriorly the surface of body is smooth, 
light brown in color. Posteriorly the portion not covered by 
the shell is rougher and marked by brownish lines, but no „ 
papillae. Dorsal cirrus of anterior parapodia short, acute; of 
posterior ones, long, club-shaped. 
Length, 28 mm. Width in widest part, 2 mm, tapering slightly toward head and tail. 
SIPHONOSTOMUM Otto. 
Siphonostomum cariboum Grube. 
Siphonostomum cariboum Grube, Annulata Oerstediana, 1858, p. 108. Quoted from Ehlers, Annelids of the Blake, p. 158, 
pi. 42, figs. 6-9. 
Collected from Ensenada Honda (Culebra), and from stations 6062 and 6063. 
4. 75. 
Figs. 73-75. Stylaroides glabra. — Fig. 73, 
Anterior portion, x 12. Fig. 74, Pro- 
boscis. Fig. 75, Seta very highly mag- 
nified. 
Family SABELLIDTE. 
SABELLA (L.) Malmgren. 
Sabella spectabilis Grube. 
Sabella spectabilis Grube, Annulata Semperiana, p. 253, pi. 14, fig. 4. 
In the main features of size, structure, and color, these agree with Grube’ s description. Minor 
differences are these: Grube says that the first shield has an incision on its anterior edge, that the 
capillary set* are shorter toward posterior end, and that gill filaments are present as far as the extreme 
end of the gill. Grube gives no figures of the tip of the gills, and I am not certain from his description 
whether in the last point his specimens really differ from those I have. In the other features they do 
not agree. The tentacles are relatively longer, also, than in Grube’ s specimens. Since, however, they 
agree in other respects, I have assigned them to Grube’ s species. Tube of parchment-like material, the 
upper end covered with fine mud. 
Collected from Ponce, Boqueron Bay, reef at Ponce, Mayaguez, Guanica Bay, and Hucares. 
Sabella melanostig-ma Schmarda. 
Sabella melanostigma Schmarda, Neue Wirbellose Thiere, p. 36, pi. 32, fig. 190; Ehlers, Annelids of the Blake, p. 263. 
Specimens of this species very numerous in this collection. The thoracic segments number from 
12 to 15. Ehlers says there are always 15. This variation does not seem to be due to age differences, 
as the largest do not always have the most segments. Two to five pairs of eyes on tentacles. 
Collected from Ponce, Guanica Bay, reef at Ponce, Boqueron Bay, and Ensenada Honda, Culebra. 
A tube from station 6051. 
