1923] NATURAL SCIENCES OF PHILADELPHIA 235 



type of setae is replaced by even more slender setae without trace of 

 limbi and bearing series of broad ensheathing awns or scales 

 which become smaller and disappear at the tip. 



Crochets are small and numerous (upwards of forty in the middle 

 region). The stems are extremely long and slender, tapered to 

 the surface of the body, strongly curved, the shoulder prominent 

 and abrupt, neck rather short and stout, head small, broad, nearly 

 spherical, with a rather long, slender, flattened beak and a broad 

 low crest of three transverse rows of numerous teeth. The guard 

 consists of about ten filaments and spreads before and above beak. 



This species is known only from the type. Station 4405, off San 

 Clemente Island, 654-704 fathoms, green mud; a fragment of a 

 small specimen of doubtful determination from Station 4431, off 

 Santa Rosa Island, 31-45 fathoms, green and yellow mud, and 

 coarse gray sand; and 'an anterior end from Station 4547, off 

 Point Pinos Lighthouse, 1073 fathoms, soft gray mud. 

 Maldane lacera sp. nov. 



The type and only specimen is complete and measures 55 mm. 

 long and very uniformly 2.3 mm. in diameter. 



Outline of cephalic plate broadly elliptical, width nearly four- 

 fifths length. Limbus divided into a pair of lateral and a posterior 

 lobe by a pair of deep clefts which continue on to the peristomium; 

 the lateral lobes small with contracted base and expanded margin 

 irregularly divided into sharp triangular teeth of variable size; 

 posterior lobe prominent and constituting about one-half of margin, 

 its border divided into twelve teeth, sharply triangular and similar 

 to those of lateral lobes, but of nearly regular size. Median carina 

 low, broad and rounded, about one-fourth as wide as cephalic 

 plate, slightly longer than lateral lobes at the anterior margin of 

 which it abruptly expands into the broad, short rounded jialpode 

 which has a width of about one-half the cephalic plate and exceeds 

 the lateral lobes in size. Mouth a conspicuous opening bounded 

 by the biannulate peristomium which projects from the enveloping 

 collar borne by somite II. 



Following the head are nineteen setigerous somites and a]ipar- 

 ently but one, or possibly two, very short and crowded acluetous 

 preanal segments. None of these segments more than slightly 

 exceeds in length its diameter and most are less than this. 



Somite II is about two-thirds as long as wide and divided by a 

 deep furrow into an anterior setigerous and collared ring and a 

 posterior ring about two-thirds as long. The prcsetal collar is 

 prominent and embraces closely the peristomium, its height l)eing 

 about one -third of the length of the segment and its margin thin 

 and smooth and entire except for a notch at the level of the setae 

 bundles, ventral to which the rounded border flares strongly. 



