142 Prof. M‘Intosh’s Notes from the 
the tube is in some expanded a little and turned over. The 
structure of the collar-bristles is precisely the same as in 
the St. Andrews examples. 
Station 18a. 455m. 18.6.1906. 
The tips of the branchial filameuts are enlarged as flattened 
lobate processes in every instance, and in several the ex- 
pansion passed down the filament for some distance. The 
pinne on these filaments were all rather long and slender, 
and in marked contrast, for instance, to those from Plymouth, 
in which the short thick pinne are diagnostic, the whole 
branchial apparatus being less developed. The great length 
and the number of the pinnee in the form from the North 
Sea give the branchie a densely capillary aspect. Asa rule, 
the terminal pinne are shorter and thicker, partly, in all 
probability, from more active growth. Besides the examples 
just mentioned others showed similar enlargements at the 
tips of the filaments and no opercula; whilst ina third series 
a minute, fiattened, or slightly saucer-shaped operculum 
appeared on each dorsal filament. Such could have been of 
no service as a protection. The structure of the collar- 
bristles of these specimens corresponds exactly with that of 
the St. Andrews form. 
Station —. Off Moowick Head, 99m. No. 165. Cap- 
tured in trawl. 12.8.1908. 
All these presented the rounded granular masses (early 
ova) on each side in the caudal region, and no ova in front. 
Opercula were present, and seven or eight pairs of anterior 
bristles. In structure the collar-bristles agree with St. 
Andrews examples. 
Station —. 15.8.1908. 
‘hose examined had two opercula and no enlargements 
at the tips of the branchial filaments. The anterior bristles 
were seven or eight, the young having fewer. The collar- 
bristles agree with those from St. Andrews. 
‘ Porcupine,’ 1870. 45 fms. off Cape Sagres. 
In these examples the branchiz are of moderate length 
(about that of the specimens from Plymouth) and furnished 
with two well-formed opercula. The pinue are somewhat 
more slender than those from Plymouth. Moreover, most 
or all of the opereula had a little process on the edge of 
the comparatively large organ. ‘The rest of the filaments 
ended in a tapering tip. There were eight pairs of anterior 
bristles. The collar-bristles are minute and transparent, but 
the basal region of the wing is differentiated and serrated as 
