THE LAND AND FRESHWATER MOT,LUSCA OF DORSETSHIRE. 10$ 



half, convex, the last occupying about three-fifths of the shell ; 

 spire slightly raised, blunt; suture well marked, not deep; mouth 

 crescent-shaped, oblique ; outer lip thick, reflected, with a rib inside, 

 inflected above; colour of the lip, rib, and columella reddish-brown ; 

 inner lip of the same hue but paler ; umbilicus in the adults com- 

 pletely closed. L.0.65. B.0.9. 



Var. 1. hortensis. Shell smaller and more globular; mouth white- 

 lipped, and rib of the same colour; inner lip excessively thin and 

 coloured, or banded like the rest of the shell ; often without bands. 



Var. 2. hybrida. Shell of the same size as the first variety, but 

 not so globular ; mouth and rib of a pink or liver-colour. 



Var. 3. major, Ferussac. Shell much larger and rather more 

 depressed than usual. 



Var. 4. minor. Shell dwarfed, of the same shape and colour as 

 the first variety. 



Hab. Woods, hedges and gardens. Generally distributed. 

 Var. i. Worth Matravers ; Smedmore ; Houghton Wood 

 (J.C.M.P.). Var 2. Rodwell, near Weymouth (Damon). Var. 

 3 East Lulworth (Kendall) ; Gadcliff, Tyneham (J.C.M.P.). 

 Quaternary tutaceous deposit, Blashenwell. 



5, ii. AKBUSTORUM, Linn., pi. 8. 



Pali, cat., p. 47, Rack, ed., p. 54, pi. 2, fig. 6. 



Body black, or dark-grey above, lighter grey beneath, shining, 

 rounded in front. 



Shell globular, convex above, and like the last depressed below, 

 solid, nearly opaque, glossy, mottled with yellow and brown, gener- 

 ally with one longitudinal brown band round the middle of each 

 whorl, with faint unequal spiral lines, intersected by other finer 

 ones ; whorls five to six, convex, the last occupying about three- 

 fifths of the shell ; suture deep ; spire depressed usually, and obtuse ; 

 umbilicus very narrow and oblique; mouth oval crescent-shaped; 

 outer lip white, thick, and reflected ; inner lip very thin and trans- 

 parent, filmlike. L.0.5. B.0.8. 



Hab. In moist and shady woods and hedges, East Lul- 

 worth (Kendall) -, Swyre Hill, Encombe ; Stoke Wake Hill ; 

 Houghton Wood (shell smaller, with three brown bands round 

 the last whorl). Woods, Creech Grange (J.C.M.P.). 



