Pomona College, Claremont, California 7 
of 35 mm. with a maximum width, exclusive of parapodia, of 2 mm. The body at 
present has a purplish tinge. 
Dredged at 10 fathoms on Aug. 27, 1917. 
Type—M. C. Z. 2, 146. 
SYLLIDAE 
Typosyllis bella sp. noy. 
Differing from armillaris (Miller), alternata (Moore) and related forms in the 
form and relations of the prostomium and its appendages. The prostomium is broad- 
est anteriorly, narrowing caudad and rounded forward a little at middle in front. A 
characteristic featlire is that the three tentacles are in a transverse line along the 
anterior edge, the median being thus inserted far in advance of the posterior eyes. A 
median longitudinal furrow extending forward from caudal edge to base of median 
tentacle. he anterior eyes much larger than the posterior and farther apart, each 
somewhat transversely elliptic and located far forward at base of lateral tentacle 
on its ectal side. The median tentacle about two and a half times longer than the 
prostomium; in the type composed of twenty-one articles; only a little narrowing over 
the distal region. Lateral tentacles considerably shorter than the median. Inferior 
tentacular cirrus about equal in length to the median tentacle, the upper one much 
longer and consisting of about thirty-four articles. Neurocirri slender, subcylindric, 
somewhat conical distally or sometimes a little clavate, surpassing end of parapodium. 
Notecirri in anterior region alternating in length, the long ones surpassing the width 
of the body proper: and consisting of about thirty-two articles while the short ones 
embrace only near eigtheen. Notocirri becoming shorter and essentially uniform in 
the posterior region. Appendage of setae with subapical tooth larger and _ stouter, 
more obtuse, than in alternata, making a wider angle with the apical tooth, and 
always conspicuous; the serrations proximad of the tooth fine and rather long. The 
body is proportionately rather wide and is depressed or flattened, narrowing in the 
posterior region but retaining there the depressed form. Number of segments in the 
type, near one hundred and forty-five. General color yellowish; each somite of ante- 
rior region crossed transversely by two fine complete lines of reddish brown color. 
Width in anterior region, exclusive of parapodia, about 1.25 mm.; length near 
20 mm. ; 
Type—M. C. Z. 2, 147. 
Taken at low tide. 
The type is a female turgid with eggs. It is remarkable in presenting at the same 
time a well-developed collateral bud from the ventral surface near the beginning of 
the posterior third. 
Pionosyllis pigmentata sp. noy. 
Somewhat resembling P. elongata (Johnson), which also occurs in this region, but 
differing in having the dorsum pigmented throughout, being black or slaty with pale 
lines between the segments and dividing each of the latter transversely excepting 
across the middorsal region. The pigmentation may sometimes be very dilute. In 
technical details readily distinguished from that species, e. g., in the different form 
of the appendage of the setae, this being obviously more elongate and erect and pro- 
portionately more slender. Two or more dorsal setae differ in having shorter, more 
strongly curved appendages which are wholly smooth on the concave edge instead 
of being pubinate to beyond middle as in the others. Prostomium rather short and 
