106 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 92 
inserted on the first segment, near the inner bases of the setal fas- 
cicles. Dorsal cirri are probably absent from all except the first 
segment. Parapodia are biramous, the fringing papillae especially 
long and numerous on notopodia throughout; they are present also 
on neuropodia but shorter and fewer. There are two small ctenidia 
on parapodia, one posterior to the insertion of the elytra, another at 
the posterodorsal face of the notopodium; they are largest on anterior 
segments and gradually get smaller and are not visible on posterior 
segments. 
Elytra are smooth, white, oval, with entire margin; those of a pair 
meet one another in the median line or are slightly overlapping. 
Elytral cirri are simple, cirriform, attached to the elytrophore, first 
present as a minute lobe on about the twenty-first segment, increas- 
ing in size more posteriorly. Notosetae are simple, slender; most 
are spinous along their free edge, some others are almost, or quite, 
smooth. Neurosetae are composite, the appendage canaliculate, 
terminating in a pointed tip. 
Eupholoé McIntosh (1885, p. 157) was originally defined as having 
elytra provided with lateral processes (much as in Psammolyce) and 
neurosetae distally falcate with a minute secondary tooth. £. cirrata 
has smooth elytra with entire margin, and canaliculate, pointed 
neurosetae, hence cannot be Hupholoé. It does not seem to be dis- 
tinguishable from Zeanira hystricis Ehlers. The latter was first 
described west off England and has since been reported in other 
parts of the Gulf Stream. It is a deep-water form. 
LEANIRA GRUBEI (Treadwell) 
Sthenelais grubei TreaDWELL, 1902, p. 187 (U.S.N.M. No. 15906; Mayaguez 
Harbor, Puerto Rico, in 12-18 fathoms). 
The prostomium is trapezoidal, with four eyes, the anterior ventral 
pair slightly visible in dorsal view, the posterior pair elongate oval, on 
the anterior third of the lobe. The median antenna is inserted on a 
stout ceratophore with auricular paired ctenidia at its base; its cirrus 
extends distally about as far as the setae of the first segment. The 
paired antennae are inserted on the first setiger; they are clavate in 
shape, constricted subapically and terminating in an elongate knob; 
they are about one-third as long as the style of the median antenna. 
The first setiger has long, slender dorsal cirri and similar, though 
shorter (less than half as long), ventral cirri; its setae are fine, simple, 
numerous. The second and third segments are more or less fused on 
the dorsal side, as typical of Leanira, first elytra arise from the sec- 
ond segment. The third segment has neither elytra nor dorsal cirrus 
but a small branchial rudiment. Simple, spinulose setae are present 
from the third, numbering only three to five in a fascicle. 
