1885.] PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 435 



podiii elongated, promiueut, directed rather downward ; setse numer- 

 ous and long, pale yellow, with a slender terminal article. Head 

 broader than long, truncate or slightly emargiuate in front, with the 

 angles prolonged in the form of stout, tapered tentacles, nearly as long 

 as the breadth of the head; hind border narrower. Eyes four, dark- 

 brown, reniform, two anterior twice larger and a little farther apart 

 than the posterior, with a distinct, transparent front lens ; the two pairs 

 very little separated. Proboscis short, swollen, with a circle of about 

 twelve small, conical papillae at the edge, as expanded, and a small, 

 raised, lateral lobe at the base, on each side. Frontal antennae close 

 to the lateral on each side, much more slender, of about the same 

 length; three pairs of slender tentacular cirri on each side, crowded 

 together, the three upper ones with short, basal joints, very long, 

 thread- like, much longer than the dorsal cirri ; these stand above the 

 line of the parapodia. The two tirst pairs of dorsal cirri are similar 

 in size and length, and also have very large basal joints, more promi- 

 nent than those of the following ones, which are slender and mode- 

 rately long. All the cirri are transversely anuulated, but not beaded. 

 Near the tip of the parapodia, above, is a small conical cirrus, and an- 

 other occurs on the lower side at the tip. 



Ventral cirrus small, slender, not very long, situated beyond the mid- 

 dle of the parapodia. The papillte on the proboscis are about four dor- 

 sal and four on each side, apparently with none on the ventral side, 

 where there is a groove. 



Total length in alcohol IS*"™. 



Station 871, in 115 fathoms, 1880 ; station 925, in 229 fathoms, 1881 ; 

 station 2021, in 179 fathoms, 1883. 



Syllis spongiphila Verrill, sp. nov. 



Verrill, Trans. Conn. Acad., vol. iv, pi. 24, figs. 10, lOo, 1881. 

 Verrill, Eeport U. S. Fish Com. for lb83, pi. 42, fig. 183, a, 1885. 



A large, stout species, composed of numerous segments, which are 

 separated by well-marked constrictions. Head short, broad, nearly 

 semicircular in outline, with the middle of the posterior dorsal edge a 

 little produced backwards in the form of a very obtuse, rounded lobe. 

 Eyes four, the anterior larger and farther apart, situated near the outer 

 bases of the lateral antennae; the posterior pair are situated behind the 

 bases of the same antennae. The palpi are large, prominent, projecting 

 forward in the form of broad, ovate, flattened lobes, which in length 

 considerably exceed the length of the head ; their outer-posterior edges 

 are broadly rounded, projecting somewhat beyond the margin of the 

 head, while the anterior ends are narrowed, but obtusely rounded at 

 the tips. The odd median antenna is rather long, rising from the pos- 

 terior margin of the head, and, like the lateral antennae, it is regularly 

 beaded. The lateral antennae are about two-thirds as long as the median 

 and somewhat more slender. The tentacular cirri are nearly equal and 



