Gaily Marine Laboratory, St. Andrews. 53 



tlie wide lateral flap is separated from the ventral flaps b)^ a 

 notch, and the frilled flaps themselves almost touch in the 

 middle line. The number of the branchiae in each fan is not 

 less than twenty, the filaments are of moderate length and 

 appear to have a terminal process of considerable length, 

 but the specimen is not in a condition to be certain on this 

 point. The specimen is incomplete, only the injured ante- 

 rior region adhering to its tube remaining ; but the rounded 

 dorsal surface shows no trace of a groove, whilst the slightly 

 flattened ventral surface has a pale median streak with a 

 dotted line on each side, as if a nerve-cord were indicated. 



The segments of the anterior region are narrow (antero- 

 posteriorly) and the ventral scutes are indistinct. Above 

 the closely arranged bristle-tufts of the region is a small 

 dark speck. The anterior bristles are in three groups, the 

 longer upper series (PI. IV. fig, 1) having straight shafts 

 and slightly curved, finely tapered tips, without distinct traces 

 of wings. The next series is only a little shorter, but the 

 tips are diminished and the wings broader (PI. IV. fig. 2). 

 The third series projects little beyond the surface of the 

 setigerous lobe, and their tips have fully broader wings than 

 the second series. The little pigment-speck near the com- 

 mencement of the row of hooks is somewhat conical in 

 outline, since it is pointed internally and appears to be 

 composed of granules of dark pigment. The anterior hooks 

 are avicularaud characterized by the distinctness of the teeth 

 above the main fang (PI. IV. fig. 3), about six being visible 

 in lateral view. The main fang leaves the neck at con- 

 siderably less than a right angle, the posterior outline curves 

 forward at the crown, so that the region is convex, the prow 

 projects almost as far as the tip of the main fang, and the 

 posterior process is short and slightly tapered distally, and 

 in contrast with such hooks as those of Fotamilla reniformis 

 it would appear to be rudimentary. Only faint striation 

 occurs at the curvature between neck and base. No 

 accessory short bristles accompany the hooks. The tube is 

 composed of tough secretion coated at one end with fine 

 mud. 



Sabella southerni *, sp. n., was dredged by the ' Knight 

 Errant' at Station No. 8, 17th August, 1882, at 540 fathoms, 

 along with a sponge. The fragmentary specimens appear to 



* Named after Mr. R. Southern, B.Sc, of the Irish Fisheries Depart- 

 ment, wlio has done so much good work on the Annelids and other 

 marine forms on the western and other coasts of Ireland. 



