SABELLIDBS OCTOCIRRATA. 77 



mediterranean of De St. Joseph unfortunately is so indistinct that little can be said about 

 them, except that they have four teeth in lateral view, a single row occurring in the 

 thoracic forms and a treble row in the abdominal. 



The tube is a slender one to suit the small size of the species, is coated with fine 

 mud and lined by secretion. In all probability the same species inhabited small hair-like 

 tubes, composed of fragments of sand and spines of Amphidotus, procured in the stomach 

 of a haddock at St. Andrews (E. M.). 



Reproduction. — The example is a male with its body-cavity crowded with nearly ripe 

 sperms (August). De St. Joseph (1906) found ova in the thorax, abdomen and feet, but 

 the date is not indicated. 



S. adspersa, Grube, has been entered under this species with a query. It is very 

 closely allied. 



A variety which was formerly described under the title of S. malmgreni deserves 

 special notice were it only for its habitat. In this the cephalic region corresponds with 

 the type. Body slender, elongated, having the normal number of the anterior segments 

 with prominent setigerous processes bearing bristles with straight shafts and slightly 

 winged tips. Segments of the posterior region with a subulate cirrus, and the lamellae 

 with the tori near the tail are longer. The terminal segment bears two filiform cirri. 

 Hooks with a truncate posterior outline and four teeth on the anterior edge, diminishing 

 from above downward. The posterior edge is nearly straight dorsally, but curves 

 inferiority to the prow, which forms a short, slightly variable process. Posterior hooks 

 have a broader posterior edge which makes a larger angle with the outline of the base 

 (for the edge slopes downward and backward), but they have the same number of teeth, 

 and the prow is similar. Tube of secretion and fine mud. 



Habitat. — Loch Portan, Lochmaddy, North Uist, a loch into which a considerable 

 amount of fresh water mingles with the salt. The same form was dredged by Dr. Gwyn 

 Jeffreys off Valentia, Ireland, in 50 — 160 fathoms. A single example was procured, 

 measuring about half an inch in spirit. The tentacles were absent, and only three branch iaa 

 remained. The body is slender, elongated, with the normal number of the anterior 

 bristle-bearing segments, the setigerous processes being prominent and the bristles 

 retracted (the specimen having been removed from its tube). It is little tapered in front 

 but gently diminishes towards the tail. The translucent bristles (Plate CXXIV, fig. 7) 

 have straight shafts and slightly winged tips. The segments of the posterior region have 

 a subulate cirrus and the tori near the tail are longer. The terminal segment bears two 

 filiform cirri. 



The anterior hooks (Plate CXXIV, fig. 7 a) have a truncate posterior outline 

 and four teeth on the anterior edge diminishing from above downward. The posterior 

 edge is nearly straight dorsally, but curves inferiorly to the prow, which forms 

 a short process. The posterior hooks have a somewhat broader posterior edge, which 

 makes a larger angle with the basal outline (for the edge slopes downward and 

 backward), but they have the same number of teeth and the prow is similar. The slope 

 of the posterior margin brings its angle with the dorsal outline toward the middle of 

 the hook. 



The flexible tube of secretion and fine mud is cylindrical. 



