268 ri.YMOUTII MARINE INVERTEBRATE FAUNA. 



[Amphineura — condJ . : Prosobranchiata ] 

 Ischnochitonidae. 

 Oallociiiton l.evis (Montagu) : -/. G'. Jrffnys, Brit. Conch., vol. iii, 

 p. 226, fig. (as Chiton). 



The Sound, under stones at low tide (s.P.). 

 Craspedocitilus cinereus (Linnoius) : E. Forbes & Hanleij, Hist. Brit. 

 Moll., vol. ii, p. 402, fig. (as Chiton). 



The Sound, under stones at low tide ; Yealm Ii., abundant on 

 the sand-bank (s.P.). 

 Craspedochilus onyx (Spengler) : E. Forbes & Hanky, Hist. Brit. Moll., 

 vol. ii, p. 407, fig. (as Chiton asellns). 



Abundant, 15-30 fms., especially on muddy gravel (s.P.). 



Acanthochitidse. 

 Acakthochites fascicularis (Linnaeus): E. Forbes & Hanleij, Hist. 

 Brit. Moll., vol. ii, p. 393, fig. (as Chiton). 



Rocks under the Hoe, moderately common among barnacles; 

 Millbay Ch..; Mewstone Ledge ^; Yealm E., occasionally in dredg- 

 ings (r.a.t.) : Blackstone Rks., Wembury B., abundant ; Yealm 

 Sand-bank (s.p.). 



PROSOBRANCHIATA. 



Patellidse. 



Patella yulgata, Linmeus : -/. G. Jeffreys, Brit. Conch., vol. iii, 

 p. 236, fig. 



More or less abundant everywhere on rocks between tide- 

 marks (r.a.t.) : Mt. Edgeumbe, very large specs, (a.j.s.). 

 Helcion pellucida (Linnseus): /. G. Jcff'reys, Brit. Conch., vol. iii, 

 p. 242. fig. 



On stems of Lamina ria, common everywhere, especially Eeny 

 Piks. and the Bridge (r.a.t.). 



Acmseidae. 

 AcMiEA VIRGINEA (Miiller): E. Forbes & Hanky, Hist. Brit. Moll., vol. ii, 

 p. 437. 



More or less common under stones on all rocky shores, L.W.- 

 5 fms., gregarious; Drake's I., large specs. (s.P.): moderately 

 common in dredgings from the Yealm (r.a.t.). 



Fissurellidse. 

 Emarginula conica, Schumacher : E. Forbes & Hanlcy, Hist. Brit. 

 Moll., vol. ii, p. 479 (as E. rnsnt). 

 Not uncommon, 10-30 fnus. (s.P.). 

 Emarginula fissura (Linnams): E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. ii, p. 477, fig. (as E. reticvkita and E. Mulkri). 



Millbay Ch. ; Queen's Gd. (s.P.): the Breakwater, between tide- 

 marks (r.a.t.) : Mewstone Ledge ; occasional specs, on the outside 

 grounds in 15-30 fms. (it.A.T., s.P.) : Eddystone (Ids., constantly 

 present, but seldom numerous, on all grounds where shells are 

 plentiful (E.J.A.). 



