32 MARINE INVERTEBRATA OF GRAND MANAN. 



the head, and covered with dark-colored granulate papillte, which are largest and 

 most prominent above. There are four rows of bristles extending the whole length 

 of the body, of which the dorsal are longest. These bristles become very long on 

 the anterior five rings, where they are directed forwards, and extend beyond the 

 thick green tentacula, but do not form a dense brush. The segments are about 

 sixty in number, and the animal is two'inches in length. It was dredged in the 

 Hake Bay, on a shelly bottom, in 25 fathoms. 



TECTURELLA, St., n. g. 



This name I propose to apply as a generic appellation to a singular worm, of 

 which I obtained a few specimens, and which must be very closely allied, if not 

 identical with the Siphonostomum vagi)n/erum of Rathke, described at length by R. 

 Leuckart, in Wiegman's Archiv for 1849, i. p. 164. A full description is there- 

 fore unnecessary here. The sheath formed by the closely arranged anterior bris- 

 tles, the very numerous filiform cirri, arranged in two clusters, and the character of 

 the lateral bristles, or rather hooks, seem good generic characters. The name was 

 suggested by the mantle-like exterior envelop, which adheres very loosely to the 

 interior coat. 



Tecturella flaccida, St., n. s., Fig. 21. This species presents, when alive, the 

 appearance of a loose, flabby, elongated sac, covered with sordes, with a transverse 

 slit at one extremity, which discloses when its labia are laid back, the broad green 

 tentacula, and the filiform cirri. It will adhere and hang loosely by its hooked 

 bristles (see figure), which are arranged, one to each segment, along each side of 

 the body. The number of segments is about fort3'. The largest specimen obtained 

 was two inches in length and two-fifths of an inch in breadth. It was taken among 

 nuUipores and shells in 3-15 fathoms. 



BRAUA, St., n. g. 



Body short, cylindrical, composed of few segments. Bristles very short, equal 

 in length in all parts of the body; the upper ones lancet-shaped (Fig. 22), the 

 lower ones minute and imperceptible without the aid of the microscope. Oral 

 cirri few (6) in number, green, nearly equal in size with the two tentacula. This 

 genus I have separated from Siphonostoraum, from having found two species, agree- 

 ing with each other except in trivial characters, and both difiering from that genus 

 in the want of the anterior brush of forward-directed bristles. 



Brada geanosa, St., n. s. Body covered with granulate papilla?, which are 

 smaller on one side than on the other. Length, 0.7 inches; breadth, 0.16 inches. 

 Color, dark brown. On sandy bottoms in 4-6 fathoms. 



B. suBL^vis, St., n. s. Body nearly smooth, of a light reddish-brown color, from 

 the thin coating of mud which always invests it. Length, 1 inch ; breadth, .2 inch. 

 Dredged on nuUipore and muddy bottoms in the Laminarian zone. 



