1152 
BULLETIN OB’ THE UNITED STATES FISH COMMISSION. 
Elytra 12 pairs; first ovate in outline, anterior and lateral margins with a relatively very broad | i 
fringe of cylindrical processes, other margins smooth. Surface of elytron divided into angular areas ! 
of various sizes, the largest nearest the middle. These are indicated by their brown color, the lines ( 
between being colorless. From the center of each arises a hard, dark-brown spine. Toward the I 
fringed border these spines are relatively short, the ends of some showing subdivisions into 3 or 4 ' 
points. Largest spines 10 to 14 in number, on large central and dorsal areas. These in height may be \ 
very nearly equal to width of area. Other elytra more nearly reniform, those of same side overlapping, i j 
while those of opposite sides overlap for more - | 
than one- fourth of their length; concealed por- ! 
tion white, remainder brown, due to brown areas 
mentioned above. Two or three posterior pairs j 
of elytra especially noticeable for the size of the 
dorsal spines. 
Most dorsal cirri had been lost; those which 
remained were like tentacles in form and color; ventral cirrus acutely conical, with slender terminal 
prolongation reaching about to end of parapodium. Parapodium cylindrical, obliquely truncated at 
apex, with posterior and anterior edges prolonged into flat vertical lobes, the former slightly the 
longer of the two. Two large dark-brown aciculse protrude slightly beyond apex of parapodium. 
Ventrally there is a tuft of about 20 very long setae with broad basal portions; apex slightly nar- 
rowed and tapering to terminal hook. Begin- 
ning about three-fourths of length of free portion 
of seta is a double row of fine lateral teeth (fig. 
11 from side* showing one row), each with a 
narrow base and a flattened apex, these teeth 
increasing in size toward end of seta, and the 
row terminated by a single stout tooth, showing 
no secondary denticulations. Stalk of seta with 
prominent longitudinal striations extending as 
far as large terminal tooth. Dorsaily a bundle 
about equal in number to those of ventral bundle, 
of much shorter, more translucent setae, which 
taper uniformly to their apex, and show on 
either side a close-set row of minute plates each 
with narrow base, and broad, finely toothed 
apex. These overlap one another from base of 
seta toward apex, and show very little, if any, 
decrease in size toward apex of seta. 
Collected at station 4420 and from station 4551, 
vicinity of Monterey Bay, Cal. 
Type (no. 5203, U. S. National Museum) a 
specimen 18 to 20 mm. long and 5.5 mm. in 
width, from station 4551. 
Polynoe mutilata, new species. 
Head rounded, with a trace of a single anterior polynoS mutiLata> new spe cies. (12 and 13) Anterior seta, x m 
lateral eye remaining; 'median tentacle very (14 and 15) Posterior seta, x 183. 
slender; antennae slender, tapering, about twice 
as long as head, marked with an irregular black patch near the base; tentacular cirri in form much 
like antennae and marked with similar black patch, the cirri varying in size, smallest about twice size 
of antenna, largest twice the size of smallest; palps long, smooth, gently tapering to a blunt point. 
Elytra very small and inconspicuofis, anteriorly not covering dorsal surface of parapodium. Pos- 
teriorly they cover parapodia, but leave whole median area of body uncovered. Elytra thin, nearly 
circular in outline, with edge entire and no noticeable surface markings. Whole body as well as 
elytra pale yellow in color, so that elytra are not prominent. 
Anterior parapodia, e. g. second, shows a very delicate aciculum in the notopodial region, and a 
very stout one in the neuropodial. From the notopodial region protrudes a tuft of very long, fine, 
