172 Prof. M‘Intosh’s Notes from the 
from those of the Arctic examples, in which they are fewer. 
The falcate distal region forms an elongate process, hooked 
at the tip, and with a series of spines along the ventral edge. 
The corresponding bristles of P. minuta show a more robust 
and proportionally shorter tip. 
In the typical foot the dorsal lobe presents a prominent 
process and a broad slightly convex margin externally for the 
bristles, the spine piercing the apex of the convexity. The 
bristles form a dense tuft directed outwards and downwards, 
are slender, tapering, and with well-marked spinous rows. 
The ventral lobe, again, forms an oblique cone, with the spine 
issuing from the apex and the surface covered with numerous 
papilla. The shafts of the bristles are somewhat shorter and 
stouter than in the northern form (P. minuta), and the convex 
edge of the tip has more numerous spikes than in the latter 
form. The falcate tip in the Arctic examples is shorter, more 
curved—that is, the hook is more pronounced—and the spines 
along the edge are often absent. Posteriorly the dorsal 
bristles have finer spines and the ventral have fewer spikes on 
the convex distal region of the shaft, while the terminal 
faleate portion is proportionally longer and more slender. 
The papilla on the surface of the ventral division are less 
numerous and somewhat longer. The ventral cirrus is short 
and tapering, with a few short clavate cilia on its surface. 
In considering these several forms, therefore, it is clear that 
no reliable specific distinction can be drawn from the structure 
of the bristles, and this is probably more important than the 
condition of the cilia on the scales. It is true that the con- 
vexity of the end of the shaft is most spinous—that is, has a 
longer series of spines from above downwards—that the dorsal 
bristles are more distinctly spinous, and the ventral warts or 
papilles more conspicuous in P. ¢nornata ; but the characters 
are not new and only vary in degree, and may be due to the 
surroundings, with which, perhaps, we are not fully acquainted. 
The steps from var. ewimia to var. tnornata, and thence to 
the typical minuta, are easy both as regards scales and bristles. 
4, On a Collection of Annelids made by Canon Norman in 
Norway.—Part I. New Hvarne and Two Species of 
Sthenelais. 
Seme years ago Dr. Merle Norman kindly sent for exam- 
ination a series of Norwegian Annelids which he had procured 
in 1879 by dredging at the following localities, viz. :— 
; 
: 
c 
: 
a es eo Se 
