ACLIS. 103 



fleeted near the base ; it is imperfectly connected with the 

 outer lip at the upper corner ; behind it is a small and nar- 

 row umbilical chink. L. 0-1. B. 0-025. 



Habitat: East" Shetland, 82 f. (M'Andrew); Aber- 

 deenshire (Dawson); west coast of Scotland (Barlee); 

 Scarborough (Bean) ; Barmouth, Tenby, and Ply- 

 mouth (J. G. J.); Burrow Island. (Beevor); Exmouth 

 (Barlee) ; Bude (Lindsay); Guernsey (Lukis, Barlee, 

 and J. G. J.); Dublin Bay (Warren and Alder); Bun- 

 dor an (Mrs. Hancock, fide Thompson) ; Arran Isle, co. 

 Galway (Barlee) ; Seafield, in the west of Ireland (Tur- 

 ton) . Coralline Crag, Sutton, with A. supranitida (coll. 

 Wood in mus. Brit.). Bergen (coll. Loven in mus. 

 Stockh.), and in 70 f. (Lilljeborg) ; Quineville, near 

 Cherbourg (Mace) ; Loire-Inferieure (Cailliaud) . 



It appears to be the Pyramis acutissimus of Brown, 

 "found on Belton sands, near Dunbar, by General 

 Bingham.^^ 



3. A. suprani'tida^, S. Wood. 



Alvania supranitida, S. Wood, Cat. Crag Moll. Aclis supranitida, F. & 

 H. iii. p. 320, pi. xc. f. 2, 3. 



Body slender [" entirely white " (Hanley)] : head not beaked 

 [not snout-shaped] : proboscis long, strong, and retractile : ten- 

 tacles cylindrical, slender, somewhat inflated at the top, close 

 together at the base ['' subulate and truncated " (Hanley)] : 

 eyes immersed at the base of the tentacles, and placed rather 

 laterally [" placed far back, sessile, and rather distant " (Han- 

 ley)] : foot having the " mentum " [or upper edge] somewhat 

 detached, narrower than the sole, and extended [" tail simple 

 and obtuse " (Hanley)] : opercular lobe ample, of a different 

 shape on each side, being on the right larger and forming 3 or 

 4 folds, on the left produced into a single rounded lobe which 

 is folded behind ; sole tongue-shaped, truncated in front : 

 tongue unarmed ? (Loven.) 



Shell ten times greater in bulk than A. ascaris, and other- 

 wise differing from that species in not being so slender, and in 



* Exceedingly glossy. 



