THE POLYCH^ETOUS ANNELIDS OF PORTO RICO. 
207 
Basy branches rectus, n. sp. 
Anterior portion of 13 segments, the first entire; the second biannulated below, the rest distinctly 
biannulated above and below (fig. 72). Cephalic lobe triangular (not shown in figure), with blunt 
point, and on either side a dark patch composed, as seen, under high power, of a great many irregu- 
larly shaped pigment spots. (Eyes. ) Second segment about six times broader than long. Beginning 
with the second and extending to and including the thirteenth, each segment has four bundles of set*. 
Seta bundle very short, white, arising from the groove which divides the segment into annuli, and 
with a dark pigment patch at base. Setae ex- 
tremely delicate, needle-shaped. Anterior seg- 
ments increase in size up to the fifth and then 
slowly decrease in diameter to the fourteenth. 
Dorsal surface of first five segments divided by 
anastomosing lines into numerous small, hex- 
agonal or pentagonal areas. Pharynx thin- 
walled, with numerous delicate papillae. Second 
portion of body slightly wider than segments 
11-13 (fig. 72). Tori rather prominent, meeting ventrally, but with a considerable space between 
their dorsal ends. Dorsal wall of segment between tori rather thin and protruding. This becomes 
more noticeable farther back, where the whole wall is very transparent and thin, and the intestinal 
contents are easily seen through it. Anterior portion of body is much straighter than in other 
species, and there are not so great differences in the digmeter of different segments. Uncini awl- 
shaped, slightly curved at end and sharp. Not toothed. 
Collected from stations 6055, 6061, and Ensenada Honda, Culebra. 
Family OPHEUID^. 
AMMOTRYPANE Rathke. 
Ammotrypane fimbriata Verrill. 
Ammotrypane ftmbricita Verrill, Invertebrates of Vineyard Sound, p. 604, pi. 15, fig. 79. 
The eyes described by Verrill were not to be seen in these specimens, but in other respects they 
agreed with his description. Collected from Ensenada Honda, Culebra, and from stations 6093, 
6092, 6096, and 6098. 
Family MALDANIDtE. 
CLYMENELLA Verrill. 
Clymenella torquata Verrill. 
Clymene torquatus Leidy, Marine Invert. Fauna of R. I. and N. J., p. 14; Jour. Acad. Nat. Sci. Phila., 2d ser., vol. 3, p. 146. 
Clymenella torquata Verrill, Invert, of Vineyard Sound, p. 608, pi. 14, figs. 71-73. Webster, Annel. Chset. Virginia Coast, p. 28. 
Annelida Chset. Provincetown, U. S. F. C. Rept. 1881, p. 731. Andrews, Annelida Polycbseta of Beaufort, p. 294. 
An incomplete specimen, lacking the anterior end, from Playa de Ponce Reef, and an anal funnel 
from station 6055. 
CLYMENE Sav. 
Clymene cirrata Ehlers. 
Clymene cirrata Ehlers, Annelids of the Blake, p. 182, pi. 46, figs. 10 to 13. 
Four incomplete specimens, all with the posterior ends lost, were collected from station 6055 
Clymene cingulata Ehlers. 
Clymene cingulata Ehlers, Annelids of the Blake, p. 85, pi. 47, figs. 2 to 5. 
Collected from station 6069. Another from station 6068, marked “water haul, dredge fouled,” 
very poorly preserved and lacking both head and tail segments, is probably of this species. 
Two small specimens, marked “Aguadilla, 6055,” agree with the above in the shape of the head, 
but lack the collar on the fourth segment, and the teeth of the uncinate set* are much less developed. 
From their small size I have considered them immature specimens of C. cingulata. 
Clymene sp. 
Fragments of a specimen of this genus, of a different species from the above, but too much injured 
for identification, were collected from Ensenada Honda, Culebra. 
Fig. 72. — Anterior portion of Dasybranchus rectus, x 4. 
