616 A. E. Verrill — Tarbellaria, JSfemertina, and 



straight, ratio about 1 : 6-9, with the tips very minutely bidentate 

 and slightly incurved ; the lower ones are shorter, ratio about 1 : 4-5, 

 but of the same form. Posteriorly they become larger and longer, 

 with stouter stems, usually 5 or 6 in a fascicle, and the blades are 

 somewhat broader and more distinctly bidentate at tip, but the 

 change is very gradual. 



The oesophagus is very long and slender, straight, occupying 17 or 

 18 segments; its edge is divided into a circle of about 10 rounded or 

 obtuse scallops ; median tooth small, close to the edge; soft pharynx, 

 when extended, elongated, its margin with about 10 large rounded 

 lobes, longer than broad, the seven upper ones longer than the lower. 

 The stomach is small, oblong-elliptical, occupying 4 segments ; it is 

 covered by about 26 rows of small cell clusters. 



Color, in formalin, yellowish white ; oesophagus and stomach pale. 



Length, about 16™'" ; diameter, .25 to .SO'"'^. 



Dredged off Bailey Bay, in 5-6 fathoms, shell-sand. 



Typanosyllis fertilis, sp. iiov. 



A species of medium size, with a large and broad head and wide 

 palpi; rather long, strongly beaded dorsal cirri; numerous and long 

 setae, the jDOsterior ones decidedly longer and stouter than the ante- 

 rior, with a short, wide, distinctly bidentate blade. The female has 

 the posterior half of the body distended with large polygonal eggs, 

 but has no special sexual setre. 



Head unusually large and wide, broader than long, with the sides 

 very prominent and convex behind the eyes, concave farther back ; 

 front edge prominent, three-lobed ; posterior margin naiTow, emargi- 

 nate. Eyes of moderate size, brown, the anterior a little larger, far- 

 ther forward and farther apart, distant from the posterior by 3 or 4 

 diameters. Palpi large and broad, their bases rather wider than the 

 head, their free part about equal to the length of the head, broad- 

 ovate, blunt, the inner edge concave. Tentacle slightly tapered, 

 strongly beaded, composed of 16 annuli, the free part about twice as 

 long as the palpi ; distal annuli about 1^ times wider than long, the 

 middle ones about ^ as long as wide. Antennae similar but shorter, 

 only their two distal annuli extending be3i'ond the palpi. Upper ten- 

 tacular cirri similar to the tentacle and of the same length, consist- 

 ing of 15 annuli ; lower ones about .j as long. Dorsal cirri on sev- 

 eral (about 12) anterior segments mostly similar to the tentacle, but 

 :^ to ^ longer, and are equal to or considerably exceed the diameter 

 of the adjacent segments. Along the I'est of the body the dorsal. 



