172 Prof. M'lntosh's Notes from the 



from those of the Arctic examples, in which thej 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 

 papilla3. 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 

 falcate portion is proportionally longer and more slender. 

 The papillffi 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 

 papillas more conspicuous in P. inornata ; but the charactei's 

 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. eximia to var. inornata, and thence to 

 the typical minuta^ are easy both as regards scales and bristles. 



4. On a Collection of Annelids made hy Canon Norman in 

 Norway. — Part I. New Evarne 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. : — 



