THE POLY CH2ETOTJS ANNELIDS OF PORTO RICO. 
205 
Family CMTOPTERIM. 
PHYLLOCH7ETOPTERUS Grube. 
Phyllochsetopterus claperedii (?) McIntosh. 
JPhyllochxtopterus claperedii McIntosh, Challenger Reports, vol. xii, p. 374; pi. 45, figs. 9, 10, 10a, 11; pi. 46, fig. 1; pi. 24a, 
figs. 1-5. 
Tubes of this genus were included in this collection, and a few of these contained fragments of 
the animals. A single specimen retained enough of the anterior segments for comparison with 
McIntosh’s description of this species, and the points of agreement were so many that I«have placed 
them here, though it is not impossible that specific differences would be found if complete specimens 
were available for comparison. Figs. 68a, 686, 68c show characteristic setee, fig. 68a showing the 
dorsal, and fig. 68c the ventral one, fig. 686 being intermediate in position between the other two. The 
“tooth-like” brown spines were also present. 
Collected from stations 6055 and 6075. 
Family TEREBELUDtE. 
TEREBELLA Malmgren. 
Terebella annulifilis Grube. 
Terebella annulifilis Grube, Jahresberieht der Schles. Gesellsch. Natur., Sect, fur 1871, p. 49. Quoted from Grube, Annulata 
Semperiana, p. 225, pi. 13, fig. 2, 1878. 
Collected from Ensenada Honda, Culebra; Arroyo; Ponce; Mayaguez. 
Terebella variegata Grube. 
Terebella variegata Grube, Monatsb. d. Berl. Akad., 1869. Quoted from Grube, Ann. Semp. p. 227, pi. 13, fig. 3, 1878. 
The original description of this species was inaccessible to me. It apparently conforms to the 
diagnosis given by Grube, loc. cit. , second reference. Collected from Guanica Bay and reef at Ponce. 
Terebella turgidula Ehlers. 
Terebella turgidula Ehlers, Annelids of the Blake, p. 241, pi. 52, figs. 1-8. 
According to Ehlers, this differs from the generic description in having 18 bunches of capillary 
sette. All of the Porto Rico specimens, which agree very closely in other respects with his descrip- 
tion, have 17. Gills with very thick stem, branches very arborescent; anterior gill largest, the next 
three-fourths size of first, the third very small. In Ehlers’ s type specimen the third left gill was 
not present. In a specimen from Playa de Ponce the first right gill had been lost, not even a scar 
showing the point of attachment remaining. It either had not developed or had broken away so 
long before the animal was killed that the wound had entirely healed. I would suggest that the loss 
of the third gill in Ehlers’ s type specimen is a similar individual variation. 
Collected from Playa de Ponce and from Ensenada Honda, Culebra. 
Terebella sp. 
From Mayaguez Harbor was collected the posterior portion of a Terebellid, which, on account of 
the loss of the head, could not be identified. Posterior segments thin-walled, much swollen. Color 
in formalin, a dark purplish brown. 
PHENACIA Grube. 
* Phenacia robusta Grube. 
Phenacia robusta Grube, Annulata Semperiana, p. 235, pi. 12, fig. 8. 
Grube’ s description says that only a very narrow space separates the gill filaments of the two 
sides. His figure, however, shows a considerable space between the bases of these filaments. The 
Porto Rico specimens agree in this respect more closely with his figure than with his description. 
Shell covered with numerous flat calcareous plates. (Bryozoa skeletons.) 
Collected from Puerto Real; station 6065, Boqueron Bay. From another bottle the locality label 
was lost in transferring. 
