626 BULLETIN 100, UNITED STATES NATIONAL MUSEUM. 



Intersegmental grooves indistinct anteriorly, but more conspicuous 

 posteriorly. Cuticle covered with papillae covered with fine silt in 

 anterior and middle regions of the body. No attempt leas been made 

 in the figure to represent this condition. 



Apparently everted proboscis-like structure (fig. 1), consisting of 

 heavy basal portion and narrower distal portion, freely open at the 

 end, extending from the month opening. Distal end ragged around 

 opening. Epidermis of entire structure thrown into fine longitudi- 

 nal folds. 



First six somites provided with long capillary setae (figs. 1-2). 

 Ventral setae beginning on third somite (in this specimen). Ab- 

 sence of anterior ventral tufts may be due to breaking. Setae not 

 clear in middle region. Posterior somites provided with small tufts 

 of heavy, gold-colored dorsal setae (fig. 3) of the cross striated type. 

 Ventral setae (fig. 4) long, slender, and attenuated, also of the cross 

 striated type. Heavier setae appear dorsally on the thirty-first from 

 the last somite. They are all broken off short in this specimen. 



The absence of tentacles suggested the name of S. atentaada, but 

 as breakage seems to have occurred in all parts of the body this may- 

 be erroneous. 



Type collected at station D5140, Bagacay Point, between Cebn and 

 Leyte, 385 fathoms, green mud bottom. 



Family SABELLIDAE. 

 Genus HYPSICOMUS Grube. 



HYPSICOMUS PHAEOTAENIA Schmarda. 



Sabella pliaeotaenia Schmarda (1861), p. 35, pi. 2'2', fig. SS. 

 Hypsicomus pliaeotaenia Mabenzeller (1884), p. 212 (sep. p. 16), pi. 3, 

 fig. 3. 



Genus SABELLA Linnaeus. 



SABELLA (BRANCHIOMMA) ACROPHTI5ALMOS Grube, variety. 



Plate 52, figs. 5-6. 



Sabella acrophthalmos Orube (1878), p. 258. 

 Two specimens of this were taken similar to Grube's description 

 of S. acrophthalmos in all respects except the number of thoracic 

 somites. The two specimens differ somewhat with respect to the 

 termination of the gills. One has the ends strongly rolled over, 

 as observed by Grube, and a very delicate purplish eye spot. The 

 other has the gills straightened out and provided with a large prom- 

 inent eye spot, which is divided externally by the shaft of the rachis. 

 [See Branchiomma vesiculosum Montagui as interpreted by Mcin- 

 tosh (1885).] 



