50 Prof. M'Intosh's Notes from the 



cylindrical shafts (PI. II. fig. 2) and slightly curved 

 ■winged tips, which taper to a fine point. The videst part 

 of the bristle seems to be a little above the commencement of 

 the wings. Besides the main bristles of each tuft a shorter 

 series of winged forms (PI. II. fig. 3) occur between them, 

 little more than the tips with the wings projecting beyond 

 the surface. The bristles retain the same structure through- 

 out, the curvature of the tips only showing variation. 



The anterior hooks commence at the third bristle-bundle, 

 being attached to a slight ridge, which, as the hooks approach 

 more closely to the setigerous process, posteriorly becomes 

 a small lamella. The hooks form a single row and nearly 

 correspond in structure (Pi. I. figs. 9 & 10} with those figured 

 by Malmgren, viz., having a slightly sinuous crown with a 

 peak for the ligament at the posterior angle and five teeth 

 in lateral view, the last being broad and short. The prow 

 is smoothly rounded, and the notch between it and the tooth 

 is wide internally and differs from JNIalmgren's figure. 



So far as can be observed, the number of the posterior 

 lamellae for the hooks is twelve. They are flattened and 

 somewhat irregularly conical next the bristled region, but 

 soon develop au elongated dorsal cirrus or filament, which 

 continues to the posterior end. The hooks of this region 

 (PI. I. fig. 11) are considerably smaller than those of the 

 anterior region, have a proportionally broader crown and 

 only four teeth in lateral view. The prow is proportionally 

 larger and the posterior outline more convex. 



The tube is composed of fine mud and is comparatively 

 soft. To the exterior are attached filaments of reddish algse 

 and patches of Cellepora. The tube is considerably longer 

 than the body of the animal. 



The Terebellidse dredged in the Gulf of St. Lawrence com- 

 prise Amphitrite cirruta, O. F. M., off Port Hood, Cape 

 Breton, Amphitrite, A. B., off Cape Eosier Lighthouse, whilst 

 a form near A. groenlandica was found off Port Hood. Tee- 

 hellnfiffulus, Dalyell, was met with between Cape Rosier and 

 Cape Gaspe in 1872. Thelepus cincinnatus, O. Fabr., was 

 dredged in numbers on Orphan Bank, and in 100-200 

 fathoms off Anticosti in 1871, and at No. 8, 1872. The 

 widely distributed Pisfa cristata, O. F. M., was met with oii 

 stony ground in 75-100 fathoms between Cape Rosier and 

 Cape Gaspe. A Polycirrus was dredged in 170 fathoms 

 ou the same ground. Lanassa nor dens kioldi, Malmgren 

 occurred oflF Cape George, Nova Scotia, and in various 

 hauls elsewhere. Artacama canadensis, a form near Malm- 



