PLYMOUTH MARINE INVERTEBRATE FAUNA. 273 



[ Prosobranchiata — contd.] 



Ceritliiidse, 



BiTTiUM RETICULATUM (da Costa) : J. G. Jeffreys, Brit. Conch., vol. iv, 

 p. 258, fig. (as Cerifhiinn). 



Not uncommon under stones on rocky shores, L.W.-IO fms. (s.P.). 



Triforis perversa (Linnaeus) : K Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 195, fig. (as Cerithium adverswn). 



Occasional specimens not uncommon; Eddystone Gds. ; Eame- 

 Eddy stone Gds. ; Mewstone Gds. ; Stoke Pt. Gds. (s.P.). 

 Cerithiopsis tubercularis (Montagu): K Forbes & Hanley, Hist. Brit. 

 Moll., vol. iii, p. 3fi5, fig. 



Not uncommon in dredgings from the Sound, generally on 

 sponges; occasionally on the outside grounds in 15-30 fms.; 

 Yealm E., common on red sponge (r.a.t.). 



Scalidse. 

 SCALA clathratula (Adams) : F. Forbes & Hanky, Hist. Brit. Moll, 

 vol. iii, p. 209, fig. (as Sealaria). 

 Dead shells only (r.a.t.). 

 SCALA CLATHRUS (Linnanis) : E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 206, fig. (as Scalaria communis). 



Rum B.,^ between tide-marks; Asia Sh.^; Yealm R.^ (r.a.t.). 

 ScALA TURTONI (Turton) : F. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 204, fig. (as Scalaria). 

 Stoke Pt. Gds> (S.P.). 



Pyramidellidse. 

 Brachystomia ambigua (Maton & Packett): /. G. Jeffreys, Brit. Conch., 

 vol. iv, p. 124, fig. (as Odostomia pallicla). 



Common on the ears of Fecten opei'cularis (r.a.t., S.P.) : on 

 P. maximus (r.a.t.). 

 TURBONILLA LACTEA (Linutcus): J. G. Jeffreys, Brit. Conch., vol. iv, p. 167, 

 fig. (as Ododomia). 



Occasionally under stones, particularly where there is a certain 

 amount of silt, L.W.-IO fms.; Drake's I.; Jennycliff B.; etc. (s.P.): 

 Asia Sh. ; Wembury B. (r.a.t., s.p.). 

 Pyrgostelis interrupta (Totten): E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 245, fig. (as Chemnitzia rufa). 

 Rame-Eddystone Gds., occasionally (s.P.). 



Eulimidse, 

 EULIMA polita (Linnaeus): J. G. Jeffreys, Brit. Conch., vol. iv, p. 201, fig. 

 Not uncommon on muddy gravel, 15-35 fms. (s.P.): Mewstone 

 'Amplnoxus' Gd., not unconnnon ; Mewstone Ledge, occasionally; 

 Stoke Pt. Gds.; Rame-Eddystone Gds. (r.a.t., S.P.): Eddystone Gds. 

 (E.J.A., s.P.). 

 EuLlMA IXCURVA (Renier) [ = E. distorta, auctt., nee Deshayes] : F. R. 

 Syb's, Proc. Malac. Soc, vol. v, p. 350, fig. 



Common among sponges, etc. ; Millbay Pit; Asia Sli. ; Mallard 

 Sh. ; Yealm R. ; etc. (.s.P.). 



