Pomona College, Claremont, California 5 
and III. Paired tentacles short, proximally thick and convexly bulging, abruptly nar- 
rowed to an acute tip with incurving sides. Unpaired tentacle situated between eyes 
in line connectnig their centers, nearly of same length and size as the first tentacular 
cirri and about as long also as prostomium; annulate. Prostomium shortly sub- 
cordate, well rounded in front, incurved caudally. With very large cirri of which 
the dorsals widely overlap in the middle and thus completely cover the dorsum, the 
prostomium normally also being wholly concealed from above. The neurocirrus of 
a typical parapodium is attached by a broad base extending from a pronounced 
ventral swelling or flange (neurocirrophore) across the caudal sid of the parapodium 
to its dorsal edge and projects farther dorsad of the parapodium than ventrad, the 
dorsomesal end widely rounded; much broader dorsoventrally than long, with the 
free edge evenly rounded. The notocirrophore in a thick rounded body arising from 
the base of the parapodium proper and showing the notopodium as a proportionately 
much smaller lobe on its ectal side; the style is attached about its caudal half-circum- 
ference and is broadly subreniform with the free margin coarsely crenulate or wavy, 
its mesal limb widely overlapping that of the opposite notocirrus and its ectal one 
overlapping the neurocirrus. Surface of cirri and of somites, especially ventrally, 
densely covered with very fine brown dots or points. Number of segments in type, 
near seventy-three. Body narrowing caudad, becoming narrow and pointed at posterior 
end. Proboscis unknown. 
Length, 19 mm. 
Type—M. C. Z. 2, 143. 
Dredged. Brown in life, this color being also retained in the preserved type speci- 
men. A paratype has a greenish cast. This species suggests Notophyllum imbricatum 
Moore in the large imbricated notocirri covering the dorsum but in the latter all the 
tentacular cirri are of the elongate, symmetrical, evenly tapering form charactceristic of 
its genus. Imbricatum similarly presents nuchal appendages, but these are three in num- 
ber on each side and slender, instead of two broad, subelliptic lobes. The neuropodium 
is distally narrowed instead of broad, the head is differently formed, and various 
other differences are present throughout. 
Steggoa gracilior sp. nov. 
This is a small and slender form noted as green in life and also retaining this 
color after preservation in alcohol. It agrees in general with Steggoa, the first seg- 
ment being normally developed above and distinct from the prostomium though not 
so clearly separated as usual, suggesting a tendency toward the Hyfoeulalia condition. 
Prostomium a little longer than wide, narrowed anteriorly, sides convex; a short 
lobe, rounded in front and bearing the four tentacles, is set off by a weak constriction 
from the basal part. Unpaired tentacle situated well caudad, more slender than the 
paired ones but nearly as long. Eyes not detected. Ventral tentacular cirrus of II 
of a thick, leaf-shaped form, sublanceolate in outline and much like the notocirri. The 
other tentacular cirri longer and filiform. Notocirri in outline lanceolate, character- 
istically exceptionally thick in proportion to width so as at times to appear nearly 
subconical. Neurocirri much smaller; similarly proportionately thick and at times 
subconical. Body slender, strongly narrowed from the middle toward both ends. The 
