RISSOA. 45 



It is the R.pygmcea of Michaudj and probably R.fas- 

 ciata of Requien. 



23. R. solu'ta*, Philippi. 



R. soluta, Phil. Moll. Sic. ii. p. 130, t. xxiii. f. 18 ; F. & H. iii. p. 131, 

 pi. lxxv. f. 3, 4. 



Body pale-yellowish-white, minutely speckled with flaky 

 points : mantle lining the month of the shell : filament con- 

 spicuous: snout short, having a pink or dull-reddish- brown 

 tinge above, and a patch of bright sulphur- yellow on each side 

 below : tentacles cylindrical but somewhat compressed, slender, 

 thickly covered with fine and rather long cilia : eyes scarcely 

 raised, usually seen within the shell : foot long and narrow, 

 labiated in front and slightly auricled at the corners, bluntly 

 pointed behind : appendage very long and distinct, flattish at 

 the base, and tapering to a fine point. 



Shell conic-oval, with a tendency to globoseness, solid for 

 its size, semitransparent, and rather glossy: sculpture, extremely 

 fine and somewhat numerous spiral striae, which are not per- 

 ceptible except by a very strong magnifier or (in some speci- 

 mens) under a microscope: colour uniform buff or pale-yellowish: 

 spire very short, with a blunt point : whorls 5, convex, the last 

 equalling two- thirds of the spire : suture deep : mouth more 

 round than oval : outer lip rather thick : inner lip reflected at 

 the base, behind which is a small umbilical chink : operculum 

 ear-shaped, marked with a few diverging lines of growth. 

 L. 0-05. B. 0-035. 



Var. Alderi. Larger and thinner, with a more produced 

 and pointed spire. B. Alderi, Jeftr. in Ann. and Mag. N. H. 

 ser. 3. iii. p. 127, pi. v. f. 5 a-c. 



Habitat : Coralline zone in Shetland, the Hebrides, 

 and Guernsey ; also in Dunnet Bay, Pentland Firth, and 

 Moray Firth (Gordon), Aberdeenshire coast (Dawson), 

 Clyde district (Webster and others), Belfast Bay (Hynd- 

 man and J. G. J.), Dublin Bay (Kinahan), Cork (J. G. 

 J.),Bantry Bay (Beevor), Arran Isle, co. Galway (Bar- 

 lee), west coast of Ireland (Hoskyns) , Fowey and Kings- 

 bridge (Barlee), Helford (Hockin), Exmonth (Clark), 



* Loose (referring to the convolutions of the spire). 



