LUTRARIA. 373 



its orifice about thirty slender yellow rays, each ray being 

 alternately dotted with a minute red and yellow point." 

 These dots are analogous to the coloured points or ocelli 

 which we have noticed in describing the Ascidia, where 

 they are conspicuously seen around the branchial and 

 anal orifices. The tube and mantle are more or less 

 invested with a thin, wrinkled, brownish epidermis. The 

 branchiae are of a brownish hue. On each side of the 

 mouth is a pair of narrow, triangular, pointed labial ten- 

 tacles. 



Notwithstanding that fine shells, of this species, are not 

 easily procurable, (their habitat, a moist oozy sand or mud 

 repulsing the less sturdy and zealous collectors,) it is 

 abundantly prolific and sufficiently diffused. We may 

 enumerate among other localities Scarborough, where it is 

 common (Bean) ; Exmouth (Clark) ; Torbay (Jeff, cab.) ; 

 the Islet of Herm near Guernsey (S. H.) ; Oxwich Bay, in 

 Glamorganshire and Laugharne (Jeffreys) ; Tenby, where 

 the shores are strewed with dead valves (S. H.) ; in twelve 

 fathoms, Anglesea (E. F.) ; Isle of Man (E. F.) ; " Ban- 

 try, Dublin Bay, and Cork Harbour" (Humphreys and 

 Jefl:reys) ; and in other " suitable localities on each side of 

 the Irish coast" (Thompson) ; Frith of Forth (E. F.) ; 

 Aberdeenshire (Macgillivray) ; St. Andrews, abundant 

 (E. F.) ; the west coast of Scotland (Barlee and Jeffreys); 

 Murray Frith, and the Hebrides (M'Andrew) ; Lerwick 

 (Jeffreys) ; Balta Sound, Unst in six fathoms (M'An- 

 drew). 



