88 Prof. M'Intosli's Notes from the 



and veutrally a siugle powerful golden spine close to it on 

 the ventral side. The dorsal tuft consists of a few capillary 

 Ijristles with tapered tips, some of the longer and more 

 delicate tips having opposite spikes. The ventral division 

 has a single spine or two of a fusiform outline, the tip 

 tapering to a strong and rather blunt point of a deep yellow 

 colour by transmitted light. The central and inferior regions 

 are closely striated and in some marked by transverse lines, 

 and the fine striae pass upward almost to the tip. Powerful 

 muscles are attached to the spine, sloping from the base of 

 the organ obliquely outward. The three sets of hooks or 

 spines project prominently outward each on a papilla almost 

 midway hetween the dorsal and ventral borders. 



Dorsally the anterior end in N. maculata is pale, with 

 madder-brown specks, or speckled with white on a brownish 

 ground. A transverse S-shaped figure of white occurs on 

 the snout dorsally, the ends meeting in the middle line. 

 The fourth bristled segment is often crimson, whilst in 

 others the whole anterior region is so. The general hue of 

 the body behind is dull orange, marked dorsally by the median 

 blood-vessel. Most show a tendency to a whitish belt 

 between the seventh and eighth segments. The anal funnel 

 is dotted with whitish grains internally. Those at Loch- 

 maddy had a dark brown snout, this tint fading into straw- 

 colour posteriorly at the anal funnel. The latter has a series 

 of short and somewhat triangular processes or cirri nineteen 

 to twenty-one in number and of general uniformity, though 

 variations occur, one example presenting a continuous series 

 of eight or nine smaller cirri. The cup slopes evenly to the 

 centre, in which is the anus. Viewed laterally the dorsal 

 slope of the funnel is the shorter. In front of the anal 

 funnel are two narrow rings. The bristles are in a double 

 group, a ventral series of stronger capillary bristles with 

 wings and a dorsal of more slender finely tapered forms with 

 opposite spikes and a smooth shaft. The first three bristled 

 segments have a dorsal series of the usual kinds, and a short 

 distance beneath a single strong spine, Avhich appears to be of 

 special service to the annelid in its movements of extension 

 beyond the tube. The strong sharp point would instantly 

 anchor the body by impinging on the tough lining of the 

 tube or other hard surface externally. The fourth and fifth 

 feet also occasionally have two of the strong spines, and the 

 former has a few hooks which differ from the typical form 

 behind in the greater proportional size and elongation of the 

 great fang and the upright position and blunt condition of 

 the spikes on the crown. The fifth foot has a larger number 



