JOHNSON: POLYCHAETA OF PUGET SOUND REGION. 405 
mature specimens of exceptionally large size at Point Cavallo, on 
the northern shore of the Golden Gate, where it occurs in small 
numbers on the underside of stones, inside of dead shells, etc. The 
much-swollen caudal segments, turgid with ripe ova, are very con¬ 
spicuous. 
I have examined the radial muscle-columns in the proventriculus, 
and find the structure as regards the central core of granular, undif¬ 
ferentiated protoplasm, in which the nuclei are located, and as 
regards the peripheral layer of muscle tissues, in harmony with the 
statements of Haswell (’86) and Malaquin (’98); I have not, how¬ 
ever, been able to discern striations in the muscular part, but this 
may be due to the fact that the material was not preserved with a 
view to histological study. 
21. Trypanosyllis gemmipara sp. nov. PI. 7, figs. 72-76. 
Form elongated, much flattened dorso-ventrally, tapered towards 
both ends, abruptly towards the head, gradually towards the 
pygidium ; somites very short; parapodia less than one sixth the 
width of the trunk in its widest portion; somites very numerous 
(800 or more). 
jP rostomium (Fig. 72) comparatively small, broadest in front, 
distinctly bilobed, the lobes separated by a median furrow ; eyes 
four, the anterior pair larger and very slightly further apart than 
the posterior. Median cirrus nearly twice as long as the antennae; 
these, as also the peristomial cirri and all the dorsal cirri, monili- 
form, with numerous short articulations, diminishing in size towards 
the tip. Entire surface of cirri covered with dark brown, easily 
detached, bud-like bodies (Figs. 72 and 74). Palpi (p.) reniform, 
elongated, projecting far in front of the prostomium, widely sepa¬ 
rated their whole length. 
Peristomium extremely short, embracing the prostomium on its 
two sides ; bearing at its anterior corners two pairs of forwardly 
directed peristomial cirri, of which the dorsals are twice the length 
of the ventrals. The arrangement of prostomium and peristomium, 
together with their appendages, closely resembles the collocation of 
these parts in the Polynoids. 
Parapodia (Fig. 74) not prominent, ventral ramus fairly devel¬ 
oped, pointed at tip, with 7-9 setae of the form shown in Fig. 75 ; 
a small separate lobe covers the tips of the double aciculae. Ven¬ 
tral cirrus ( v . c.) short, often curved, blunt at tip, non-moniliform. 
Dorsal cirrus very long, either straight or circinate at tip ; in the 
