of the Land and Fresh-water Shells of Suffolk. 155 



muscorum the margin is broad and reflexed, and the tooth is long, 

 obliquely directed from right to left, and is on a level with it. 



These shells are also found in very different situations ; T. mus- 

 corum inhabits moss upon the bark .of trees in shady and moist 

 places ; T. marginatus, on the contrary, is only found in dry pas- 

 tures and the most open places. The young much resemble Trochi. 



Not uncommon under stones and sticks in Little Blakenham : 

 and within the bounds of Ipswich, not far from the Red-House, 

 as you go towards Westerfield by the fields. Specimens found 

 in the above situations never exceeded li lin. in length, and 

 had 6 volutions, answering exactly to the Pupa marginala of 

 Draparnaud. -iuj" >i juu lii, ji 



I have since found the same species at Shotley, at the roots of 

 grass on the marsh within the Sea Wall ; and in profusion in 

 Essex, near Wrabness point, on the upper part of the marsh ; 

 a situation which at high spring-tides is covered Avith water. 

 These latter shells were If lin. in length, and had 7 volutions. 

 Some of them were without the white band or hood above the 

 margin, which is probably attained by age ; and one specimen 

 had the aperture rather sloped towards the base, and the umbili- 

 cal cleft of course oblique ; such a variety answers well to the 

 Fupa umhilicata of Draparnaud, which is probably, therefore, 

 only a variety of T. marginatus. 



The same species has been found on the summit of Harwich 



cliff. 



24. Turbo Offtonensis. 



T. testa fusca striata subpellucida, anfractibus septem secundis 

 sensim minoribus, apertur^ rotundat^ edentuM nee mar- 

 ginati. 



Habitat super gramina et arbusta in sylvis, super truncos arbo- 

 rum, atque inter folia putrescentia. 



Testa plusquara 1^ lin. Angustior quam T. muscorum et T. mar- 



x 2 , ginatiis, 



