610 A. M Verrill — Turhellaria, JSTemertina, and 



Palpi large, separate to base, longer than head, lanceolate when 

 seen from above, with the inner edge incurved, tips blunt. 



Tentacle long and large, the free part projecting twice as far as 

 the palpi, composed of very numerou.s short annuli, 4 or 5 times 

 broader than long. Antennse similar, about ^ shorter. Uj^per ten- 

 tacular cirri similar, rather stouter and about as long ; lower about 

 ^ shorter. Dorsal cirri of about 12 anterior segments are mostly- 

 even longer than the upper tentacular cirri, much curled in various 

 directions over the head and back, equal in length to 1^ to \^ or 

 more times the breadth of the body ; farther back in the gastric 

 region they become unequal, some being about as long as the pre- 

 ceding, othei's only ^^ to f the breadth of the body, usually recurved 

 over the back ; posteriorly most of them are less in length than ^ 

 the breadth of that part of the body. Caudal cirri long, slender, 

 tapered. The anterior parapodia are short and crowded, posteriorly 

 they become well separated and longer, with longer lobes and 

 longer and stouter setae. 



Setpe of the anterior segments are 8 to 10 short and slender, accom- 

 panied by 3 or 4 acute acicula, which project but little ; the blades 

 of the upper anterior setae are narrow-lanceolate, breadth to length 

 about 1 : 4-6, with incurved acute tips, sometimes faintly bidentate; 

 the lower ones have shoi'ter blades, ratio 1:2 or 3, with more 

 incurved acute tips; the posterior setae have rather longer and stouter 

 stems, with the blades shorter, wider, ratio 1: 2 to 3|^, and with more 

 incurved tips, a few of which are minutely bidentate ; there are 

 usually 5 or 6 in a fascicle ; the stem is serrulate near the tip ; they 

 are usually accompanied by two large, straight, acute acicula. 



(Esophagus brown, rather short, thick, in the contracted specimens 

 so bent and crumpled that the length cannot be correctly determined ; 

 median tooth large, i^rojecting beyond the margin, the free part 

 equal to the length of two segments, long-conic, acute. Stomach 

 long and rather large, nearly cylindrical, occupying 17 segments, 

 covered by about 36 regular rows of well-separated, small, ellipti- 

 cal groups of cells, with definite lines between the rows. 



Color, in formalin, is dull greenish with transverse lines of a darker 

 green on each segment and a dark median dorsal stripe along the 

 back. 



Length of largest preserved specimen, 18'"'"; diameter anteriorly,. 

 1.20 to 1.40""". 



Found among the zooids of Palythoa mammUlosa at low tide. 



In life the head and anterior part of the body were noted as tinged 

 with orange-red, the head brightest red ; eyes orange ; posterior 



