u 



1923] NATURAL SCIENCES OF PHILADELPHIA 227 



of the setigerous zone of the small uimulus and in corresponding 

 positions on the head, indicating that an annular or metameric 

 pattern may prevail in life. 



Tube unknown. 



Tj'pe only. Station 4427, off Santa Cruz Island, 447-510 

 fathoms, black mud, rocks. , 



^ Nicomache carinata Moore. 



Fifteen specimens of various sizes agree fully with the types in 

 form, setae and color, the only differences being in such proportions 

 of segments etc. as would result from different degrees of contraction. 

 The number of short subequal cirri on the pygidial funnel varies 

 from fourteen to twenty-one, eighteen being the most frequent 

 number. Some specimens are filled with eggs or sperm. Several 

 tubes attached in a mass to a stone are almost horny wuth a covering 

 of sand. 



Stations 4325, off Point La Jolla, 243-280 fathoms, soft green 

 mud; 4411, off Santa Catalina Island, 143-245, fine gray sand and 

 shells; 4415, off Santa Barbara Island, 302-638 fathoms, green mud; 

 4421, off San Nicolas Island, 229-298 fathoms, gray mud; 4423, 

 same locality, 216-339 fathoms, gray sand and shells; 4430, off 

 Santa Cruz Island, 197-281 fathoms, black sand, pebbles and 

 rock; 4574, off Cape Colnett, Lower California, 1400 fathoms. 



Leichone borealis Arwardson. 



Two fragments measuring 1.7 mm. and 2.5 mm. in diameter 

 consist of the head and 8 and 9 segments respectively. As far as 

 represented they are indistinguishable from L. borealis. 



Station 4352 only, off Point Loma Lighthouse, 549-585 fathoms, 

 .^ green mud. ( ;-w,,.^ ^ 



Pseudodymene longiceps sp. nov. Plate XVIII, flgs. 33. 34. 



The type consists of head and twelve setigerous segments. 



Prostomium and peristomium completely united, their bound- 

 aries indicated by a faint ventral half-furrow, the dorsal end of 

 which is joined by a scarcely better defined longitudinal furrow 

 reaching to postcephalic furrow I/II. Anterior cei^halic angle 

 about 50° (45° in a cotype). Cephalic plate elongated, oval, 

 one and three-fourths as long as broad, the greatest widtli l)eing 

 at the end of the first third, tapering to a narrow caudal end which 

 reaches almost to the furrow I/II and is inarketl l)y five transverse 

 furrows. Limbus low but firm, of uniform height and with smooth 

 entire margin; the posterior half erect, the anterior flaring; no 



