164 Prof. M'Intosh's Notes from the 



the characters of Pygospio eleyans, but this is doubtful. 

 Two thick anal cirri occur posteriorly. 



A softened fragment from the deeper water off St. Andrews 

 Bay appears to pertain to a distinct form which may provi- 

 sionally be termed SjAo D. It is about 2 inches in length 

 and with subulate branchiae from end to end. Two e\es 

 occur anteriorly. The dorsal division of the foot has long 

 tufts of finely tapered cajjillary bristles, and the ventral 

 appear to have a similar character, though this was not 

 observed in situ. Posteriorly the dorsal bristles increase 

 much in length. Some of the tufts show also a shorter 

 series of stronger bristles with a distinct hook at the point, 

 and in some groups in the pulpy preparations no other form 

 occurs. It may be that the shorter hooked forms represent 

 the ventral series posteriorly. 



A small form procured between tide-marks, St. Peter Port, 

 Guernsey, may be related to Spio mecznikowianus * of 

 Claparede or to the Spio atlaaticus of Langerhans t, since, so 

 far as can be made out, the dorsal lamella does not fuse with 

 the brauchia, which seems to extend from the second segment 

 almost to the posterior end. Claparede, however, gives his 

 form only two anal cirri, whereas Langerhaus states that 

 there are four, the number present in the form under con- 

 sideration, and they are similar to those of Pijyospio eleyans. 

 The head somewhat resembles that of the species just men- 

 tioned, having two rounded bosses in front, apparently better 

 defined than in Pyyoapio. The median ridge continues 

 backward to the first segment or a little further. On each 

 side, about the middle of the head, is a conspicuous black 

 eye, and a trace of a second pair a little behind. The 

 tentacles are absent. The body is comparatively small, about 

 half an inch in length, somewhat broad and flattened in 

 front and then slightly tapering to the snout, more gently 

 tapered and rounded posteriorly, the tail terminating in a 

 minute segment with 4 somewhat short conical cirri as in 

 Pygospio. In the anterior segments the dorsal lamella, as 

 viewed from above, appears to be filiform — sloping obliquely 

 backward behind the bristles. Winged hooks occur ventrally 

 on the 8th foot and continue to the posterior end. The 

 shaft of the hook dilates from the narrow proximal end 

 nearly to the wings, curves backward below these, continues 



* Ann^l. Nap. p. .324, pi. xxiii. fig. 2. 



t Zeitschr. f. w. Zool. JJd. xxxiv. p. 89 (1860). 



