256 



Prof. Mcintosh's Notes from the 



tlie posterior border. Both pairs have a rounded lens-like 

 differentiation. The median tentacle is prominent, while two 

 shorter tentacular cirri occur on each side. These are sparsely 

 covered with minute papillte. The palpi have enlarged basal 

 regions and taper to a blunt point. The body is flattened and 

 of nearly uniform diameter, though slightly tapered in front 

 and more distinctly posteriorly^ where it terminates in a 

 rounded " boss " on each side of the vent (fig. 2), the globular 



Fi-. -2. 



Posterior eud of young Pholoe, X 100. 



cirri of the last pair of feet projecting a little in front. The 

 proboscis is furnisiied with well-marked teeth. The number 

 of scales is uncertain, though four pairs remained. Most iiad 

 five cilia on the outer border, though one, probably the first, 

 had seven. Lines radiating from the centre of the scale to 

 the base of the cilia probably indicated nerve-strands. The 

 feet show dorsal and ventral divisions each with a spine and 

 tlie characteristic bristles. 



The life-history of this form thus corresponds with that of 

 its allies, the larval stage being pelagic, the young by-and-by 

 settling on the bottom like their parents. A wide distribution 

 is thus attained. 



2. On the British Nephthydidas. 



In the ' Catalogue of the British Museum,' published in 

 1865, three species of Nephthi/s are mentioned, viz. N. cccca, 

 Fabr., N. longisetosa, ffirst. (?), and A^. Ilombergii, Aud. & Ed. 

 Dr. Johnston, however, had not seen an example of the latter, 

 which had been mentioned by Dr. Williams, and the precise 



