1923] NATURAL SCIENCES OF PHILADELPHIA 231 



Nuchal organs perfectly straight deep slits bounding carina for 

 entire length and ending anteriorly at each side of the small rounded 

 palpode. Mouth small, far forward, bounded by a slightly wrinkled 

 anterior lip continuous with the ventral side of the palpode and a 

 crescentic hind lip. 



Peristomium in no way separated from the prostomium and 

 from II only by a slight constriction anterior to its setae and pre- 

 ceded by an enlargement. What is considered to re()resent II is 

 a simple segment widest anteriorly and tapering slightly caudad 

 and as long as prostomium and peristomium combined; III is 

 similar, but slightly shorter. Somites IV to IX inclusive are strongly 

 contracted short cylinders, separated by well-defined furrows and 

 lacking glandular zones or other conspicuous features; X is again 

 longer, equalling VIII and IX combined. 



The head and somite II, except at the extreme caudal end, are 

 ornamented by a conspicuous finely reticulated pattern of raised 

 lines and depressed areas like chased work on metals. This is 

 somewhat faintly indicated on succeeding segments, but on these 

 annular lines predominate. From VI to IX, the segments are 

 quite smooth; X is marked with transverse wrinkles and the surface 

 is softer. 



Setigerous tubercles are situated toward the anterior ends of 

 the segments from II to VIII inclusive, at the middle on IX and 

 posteriorly on X. Except on II the tubercles are remarkably 

 elongated and conspicuous. II, III, and IV each bear a single 

 large ventral spine. The tori on following segments are all small 

 and inconspicuous and bear few crochets; 6 on V, 8 on VI, 18 on 

 VIII, and 26 to 35 on X. 



Capillary setae have the usual arrangement but are uncommonly 

 numerous. Unfortunately all bundles are broken and no intact 

 setae could be found. Neuropodials on II, III and IV consist of 

 one or rarely two stout, deep-yellow fibrous spines, crooked at the 

 tip and with slight indications of teeth when unworn. (Plate XVIII, 

 fig. 37.) Few crochets are intact. The stems are long, slender and 

 strongly curved, the shoulder slight, neck rather strongly marked 

 but swelling rapidly into the l)road thick head, with thick, ample 

 crest of five transverse rows of teeth; beak rather short and stout; 

 guard moderately developed, of seven slender filaments on the 

 only one intact (Plate XVIII, fig. 38). 



Caudal end and tube unknown. 



Stations 4337, off Point Loma Lighthouse, 617-680 fathoms, 

 green mud (fragment consisting of a few segments only) ; 4482, otY 

 Santa Cruz Lighthouse, 43-44 fathoms, hard green mud (type). 

 Euclymene delineata sp. nov. Plate XVIII, flgs. 39, 40. 



The type consists of a head and ten setigerous segments measuring 

 29 mm. long and l.() mm. in diameter. A colype from the same 



