28 Prof. iM'Intosh's Notes from the 



jjraspod by the cuticlr. ajjain dilates toward the main faufj, 

 a distinct bulge occurring below the origin of the gular' 

 bristles, wliere it is again nanowed below the main fang — 

 which is curved at less than a right angle to tlie neck, and 

 has four teeth above it. The neck and shaft arc boldly 

 striated. In the larger specimen the main fang leaves the 

 neck nearly at a right angle, and above it are four prominent 

 teeth. Tiiegular l)ristle appears to be single, and sometimes 

 curves beyond the main fang and over it. 



This species was first obtained by Dc Quatrefagcs, whose 

 description is fairly complete. 



Two examples of Heteroclymene robusta, Arwidsson, come 

 from Plymouth, and I have to thank Dr. Allen for the 

 opportunity of examining them. Besides the lateral notches 

 in the cephalic border, the rim behind has ereuations, the 

 median deepest posteriorly. Tlie segments in the middle of 

 the body can be much elongated, one being about au inch 

 and three-quarters ; the bristles and rows of hooks project 

 outward on enlargements at the segment-junctions. The 

 anal disc is an exquisite structure, as finely radiate as the 

 operculum of Sei'jjula vermicularis^ only the anus is in the 

 centre of a cone, over which the radii pass downward and 

 then upward to the minutely crenate edge. The mid-ventral 

 cirrus is somewhat flattened, as well as longest, and there 

 are three or four shorter cirri on each side, somewhat 

 irregularly arranged, a portion of the dorsal edge being bare. 



The tube is as thick as that of Lanice cunchilegn, but 

 firmer, retaining its cylindrical form until somewhat severe 

 pressure is applied. It is composed of shell-fragments, 

 minute shells, spines of Echinoderms, smoothly tilled in with 

 fine grains of sand and secretion. 



In Micromaldane ornithochceta, Mesnil, from Clew Bay 

 {Southern), a minute form, measuring 4 mm. long, the 

 cephalic reyion, when viewed from above, is somewhat 

 elavate and symmetrically rounded (elliptical). In lateral 

 view it is irregularly elavate, the dorsal outline being 

 smoothly curved and ending ventrally in the projecting 

 snout, which slopes backward and sliglitly upward to the 

 mouth. 



The body is comparatively sliort, consisting of nineteen 

 segments, seventeen of which arc bristled. It is enlarged 

 anteriorly, is cylindrical in the middle, and tapers posteriorly 



