432 SPHiEROMTD.E. 



seventh segment of the body and the basal portion of the 

 tail. The body is rather narrow, and smooth on the 

 upper side of the anterior portion. The tail is very 

 rugosely granulated, and furnished in the middle of its 

 upper surface with two erect tubercles. The outer 

 division of the lateral appendages extends considerably 

 beyond, the extremity of the body; it is oblong, and 

 slightly pointed at its extremity; its surface rugose, and 

 its edges strongly bristly. 



Taken on the south-west coast of England* by 

 Montagu and Leach ; also at Polperro, Cornwall, by Mr. 

 J. Couch; at Carrie kfergus, Lough Shinny, Dublin, by 

 Dr. Kinahan; Cork, Professor J. R. Greene; Roundstone, 

 Mr. W. M'Calla; coast of Ireland, Professor Huxley; 

 also Vagon Bay, Guernsey, by the Rev. Alfred Norman. 

 We have found it common amongst weed between tides 

 on the rocky shores of South Wales, South Devon, and 

 Cornwall; and believe it may be met with in similar 

 localities all round our coasts. It is generally associated 

 with Dynamene Montagui, of which we think it may 

 possibly turn out to be the male. 



* Dr. Leach, by a lapsus calami, says : — "Habite les rochers de la partie 

 occidentale de TAmerique." 



