Gutty Marine Lahoratorj/ , St. Andrews. 29 



to the truncated posterior end. The middle region consists 

 of two long segments. The caudal part is crenated from 

 the various rings, and the acli;i'tous last segment is truncated 

 distally with a small papilla — jjroljably repre.scnting the 

 anus. Glands are distributed extensively in the body-wall. 



The bristles have the shape of a pointed assegai or sharp 

 spear, the cylindrical shaft being stout, and the tip a 

 flattened translucent spear-point. 



The hooks are minute, apparently few in number, and have 

 a rudimentary shaft, which enlarges into a bulbous shoulder, 

 above which the neck is rather thick. The main fang is 

 curved downward at considerably less than a right angle to 

 the neck, and the crown of the hook is high, with five or six 

 teeth. In general shape these hooks somewhat resemble 

 those of Lumbriclymene minor, Arwidsson. No gular bristles 

 are present. Mesnil thought the hook resembled an avicular 

 Sabellariau bristle, and that it showed the evolution of 

 a Maldanid toward that group. Such views, however, are 

 conjectural. He found one example containing greyish ova. 



EXPLANATION OF THE PLATES. 

 Plate I. 



Serrated or spiked bristle of Eumenia ccadleryii, sp. u. x ooO. 



Smooth dorsal bristle. X 350. 



BranchijB of one side. X SoO. 



Bradn (jravieri, sp. n. Enlarged under a lens. 



Dorsal tuft of bristles. X 300. 



Great ventral bristles, tlie base being at tho top of the Plate. 



X 3.0O. 

 Anterior bristle of Fauveliopsis chaUenycria:, sp. n. X 350. 

 Pear-shaped papilla of the foot, x 350. 



Anterior bristles of greeuisli papillose 01igocha;t, Hemituhifex 

 heyiedeni, IJoddard, from St. Andrews, x 350. 

 Fig. 10. Posterior hook. X 350. 



Plate II. 



Fauveliopsis chaUengeria, sp. n., from the dorsum. Enlarged. 



Ventral aspect of the same. Enlarged. 



Lateral view, showing the lozenge-shaped areas between the 



bristle-tufts. Enlarged. 

 The anterior region niure highly magnified. 

 Anterior bristles projecting from the foot, x 350. 

 Posterior tuft of bristles. . X 350. 

 Tube of the foregoing. Twice natural size. 

 End of tube, more Inghly magnilied. 

 Lateral view of the anterior segments of Eumenia hystricis, 



sp. n. Enlarged under a lens. 

 Hook oi Milinna bu.ikii, sp. n. X 700 diam. 

 Outline of I'hascolosama lunkesteri. Miignitied iiinbv a It iis. 

 Posterior end of the latter with papilhe. X 90. 



