1909.] NATURAL SCIENCES OF PHILADELPHIA. 339 



Aciculum single, nearly colorless, straight, tapered to a point like 

 a sharpened pencil which projects slightly beyond the acicular notch 

 (fig. 17). Setae rather numerous, in broad, fan-shaped fascicles only 

 obscurely divided into supra- and subacicular groups; 8 -t- 11 on 

 somite X, 9 + 12 on XXV and L, 7 4- 9 on C of type. They are 

 colorless with moderately long stems scarcely reaching beyond the 

 border of the neurocirri of middle segments, slender and gently curved, 

 rather conspicuously inflated at the ends (PL XV, fig. 18) to form a 

 socket bounded by lateral ranks of slender teeth connected anteriorly 

 by a row of much smaller teeth. Appendages rather long, equalling 

 or generally exceeding depth of neuropodia, very delicate with striations 

 and marginal denticulations not visible under the magnification shown. 



Color generally rusty, the body pale with little color, the cephalic- 

 appendages and neurocirri deeper and the notocirri very brilliant 

 }>"ellowish brown which contrasts strongly with the paler body and 

 gives the worm its conspicuous coloring. Proboscis unknown. 



Station 4.550, Monterey Bay, June 7, 50 fathoms, green mud, rock. 



In form of the prostomium and other features this species approaches 

 P. citrina Malmgren. 



Phyllodoce (Carobia) castanea Marenzeller. 



A small example 26 mm. long with 106 segments. Like the specimen 

 previously reported from Monterey Bay this one has notocirri some- 

 what more elongated than those of Marenzeller's Japanese types. 

 The color is paler and more yellowish than in the specimen above 

 mentioned, though, like it, this is a female with eggs. There is no 

 trace of a nuchal papilla and the flattening of the tentacular cirri is 

 very obvious. 



Phyllodoce polyphylla Ehlers, from South Georgia, is probably closely 

 related to this species, though Ehler's figure exhibits no setigerous 

 lobe on II, which is very obvious in this specimen. The minute dorsal 

 tentacles shown by the type of P. polyphylla are probably merely the 

 result of these being in process of regeneration after having been lost, 

 as I have seen precisely similar conditions in several species. 



Station 4,496, Monterey Bay, May 19, 10 fathoms, fine gray sand and 

 rock. 

 Anaitis polynoides sp. nov. PI. XVI, tigs. 19-21. 



Owing to the closely imbricated manner in which the large notocirri 

 overlap the slender body this species bears a superficial resemblance to 

 an elongated Polynoe or even more to a Sthendais. The single speci- 

 men is complete, but the posterior one-fourth of the body has evidently 



