428 PROCEEDINGS OF THE ACADEMY OP^ [June, 



coming of a richer more purplish color anteriorly and there terminating 

 abruptly in a spot which includes the entire dorsum of the 7th to 10th 

 setigerous somites. A spot of the same brown color occurs on the 

 medial half of each dorsal cirrus. Otherwise the entire body and espe- 

 cially the cephalic region is of a brilliant white. 



Type specimen only; Sagami Bay, 3,702, 31-41 fms. 



Phyllodoce groenlandica (Oersted) Mgrn. 



A small example of 80 mm. 

 Suruga Bay. 3,707, 63-75 fms. 



NEREIDS. 

 Nereis pusilla sp. nov. (PI. XXIV, figs. 25. 26, 27.) 



The type specimen, consisting of 50 somites, measures 20 mm. long 

 and 2.2 mm. between the tips of the parapodia at the widest point. 



Prostomium longer than wide, the preocular portion little narrower 

 than ocular, anterior margin broad, truncate, lateral margin little ex- 

 cavated for palpi. Eyes two pairs, large, conspicuous, black, appa- 

 rently posterior only with cuticular lenses ; posterior on extreme hinder 

 margin of head, circular; anterior somewhat larger, more widely sep- 

 arated, at bases of palpi, elliptical. Frontal tentacles widely separated 

 at base, conical, length much less than (f ) distance between posterior 

 eyes. Palpi prominent, as long as prostomium, terminal piece short, 

 conical. 



Peristomium h prostomium above, f as long laterally. Tentacular 

 cirri rather short, slender, non-articulate; posterior dorsal reaches to 

 V, anterior dorsal to IV, and both ventral ones to III. The following 

 somites are long, the anterior ones equalling the peristomium in length. 



Parapodia slender and very prominent, after the r2th about equal- 

 ling the width of the body. The 15th parapodimn has the l^ase about 

 as long as deep, the notopodium larger than neuropodium, which it 

 slightly overlaps anteriorly; notopodium divided into two long, 

 pointed, conical, dorsal to ventral lobes, between which the setoe arise, 

 and a very slightly shorter slender, presetal lobe; the notopodial cirrus 

 very slender, arising from the swollen basal ^ of the dorsal notopodial 

 lobe, and reaching scarcel}^ beyond the tip of the latter. Neuropodium 

 consisting of an elongated conical ventral lobe and a slender setigerous 

 lobe which divides at the end into a short broad presetal and a very 

 long slender postsetal process, the latter extending slightly beyond any 

 other portion of the foot; neuropodial cirrus small and slender, its 

 origin well separated from base of neuropodium, and its tip failing to 



