. EOLIS. 47 



fawncoloiired, spotted with brown and white ; set in 9 rows : 

 foot with the anterior angles a Httle produced and pointed. 

 L. 0-5. 



Habitat : Under a stone at low-water mark, Torbay (Alder). 

 [?W. Sweden (Loven).] 



This obscure' species, of which one specimen was got in 

 1845, requires further investigation. There is a possibility 

 of its being either a variety of E. angulata, or the young of 

 one of the many varieties of E. jpapiUosa. 



22. E. coNCiNNA, Alder and Hancock. 



E. concinna. A, & H. in Ann. N. H. 1st ser. xii. p. 234 ; Brit. Nud. Moll, 

 fam. 3, pi. 24. 



Body oblong, pellucid white, tinged with buif or yellow : 

 dorsal teiitacles rather long, smooth, white : oral tentacles one- 

 third shorter than the dorsal pair, arising from the upper sur- 

 face of the lips : branchial processes oblong, nearly linear, 

 purplish-brown and granulated internally ; the outer surface 

 pellucid, with a tinge of blue, giving them a metallic lustre ; 

 set in 9 or 10 rows : foot linear, pellucid ; the anterior angles 

 broad, and produced into blunt points. L. 0*5. 



Habitat : On Sertiilaria argentea at low-water mark, 

 Whitley, Northumberland (Hancock); Egremont, near Liver- 

 pool [on LaoynecUa gelatinosa'] (Colhngwood) ; [Cumbrae 

 (Eobertson). W. Sweden (Loven); Christianiafiord (Asb- 

 jornsen).] 



A pretty species, though rather sober in colour. The glan- 

 cing of the light on the papillae when in motion gives them a 

 silvery appearance. 



23. E. oliva'cea, Alder and Hancock. 



E. olivacca, A. & H. in Ann. N. H. 1st ser. ix. p. 35 ; Brit. Nud. Moll, 

 fern. 3, pi. 26. 



Body rather stout, yellowish-white, with opaque-white 

 spots ; a rosecoloured streak on each side of the head : dorsal 

 tentacles linear, smooth, rather short, yellowish-white, with a 

 band of rosecolour: orcd tentacles rather shorter than the 



