POLYCH.ETA OF THE L.M.B.C. DISTRICT. 157 



0. F. M. In fact, these two names are now accepted by 

 all authorities as synonyms. 



*ChcBtozone setosa, Malmgren. 



Hab : Egremont, in clay between tide-marks. 



Specimens found February 21st, 1891, contained ova 

 quite ripe. An egg mass found on the same spot with 

 these I believe belongs to this species. It was about the 

 size and shape of a pea, of a faint green colour, and was 

 anchored in the sand by means of a cylindrical stalk. 

 The embryos which I was unfortunately unable to 

 examine in detail appeared to be cephalotrochs approach- 

 ing closely in form to those of Arenicola. 

 Family. — Spionid^ . 



Carrington [loc. cit.) mentions three species from 

 Southport, viz: — Spio seticornis, (Fabricius), Spio quad- 

 ricornis, Lamarck, and Nerine coniocephala , Johnston 

 (=^N. foliosa, Sars), and catalogues N. vulgaris as doubt- 

 ful. I have not had the good fortune to find the second 

 or the third of these, but on the other hand I have pro- 

 cured a number of specimens of N. clrratulus which 

 previously has been but once recorded as British (Firth 

 of Forth). I am also able to say with certainty that 

 N. vulgaris is included in our local fauna. 



Spio seticornis, (Fabr.). 



Very abundant on the Mersey shore between Egremont 

 and New Brighton — chiefly about or a little above mid- 

 tide level. As half-an-inch of their fragile sand-tubes 

 projects from the surface, their multitude gives some 

 patches of sand quite a ragged appearance. 



* Nerine cirratulus, (D. Chiaje). 



Hab : Egremont (common between tide-marks). 



Specimens found 1st March, 1890, were full of elliptical 

 ova exhibiting the peculiar and characteristically marked 

 vitelline membrane described by Claparede {Chet. du Golfe 



