PLYMOUTH MARINE INVERTEBRATE FAUNA. 271 



[ Prosobranchiata — co)itd.] 



Manzonia costata (J. Adams) : U. Forbes & Hanky, Hist, Brit. Moll., 

 vol. iii, p. 92, fig. (as Rissoa). 



Drake's I. ; Millbay Pit ; occasionally (r.a.t.). 



Zippora membranacea (J. Adams): E. Forbes (& Hanlry, Hist. Brit. 

 Moll., vol. iii, p. 109, fig. (as Rissoa labiosa). 



Common on Zostera (s.P.) : Cawsand B., very common ; Yealm 

 Est., moderately common (r.a.t.). 



Onoba striata (J. Adams): E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 94, fig. (as Rissoa). 



Connuon on all rocky shores, gregarious under stones, particularly 

 where there is a certain amount of silt, L.W.-IO fms. (s.P.). 



Ceratia proxima, Alder : E. Forbes <£■ Hanley, Hist. Brit. Moll., vol. iii, 

 p. 127, fig. (as Rissoa). 

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



Hyala vitrea (Montagu) : E. Forbes & Hanley, Hist. Brit. Moll., vol. iii, 

 p. 125, fig. (as Rissoa). 

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



Cingula semistriata (Montagu): E. Forbes tC- Hanky, Hist. Brit. Moll., 

 vol. iii, p. 117, fig. (as Rissoa). 

 Millbay Pit (r.a.t.). 



Cingula trifasciata, J. Adams: E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 122, fig. (as Rissoa cingillus). 



Common between tide-marks on all rocky shores, gregarious 

 under stones and in crevices, especially where there is a certain 

 amount of silt ; Yealm Sand-bank (s.P.). 



Galeodixa carinata (da Costa) : E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 73, fig. (as Rissoa striatula). 

 Dead shells (r.a.t.). Assimineid^. 



Paludestrina stagnalis (Baster) : J. G. Jeffreys, Brit. Conch., vol. iv, 

 p. 52, fig. (as Hydrobia ulvce). 



Common in brackish water ; the Hamoaze ; Hooe Lake ; etc. 



^ ' ' '^' Adeorbidae. 



Adeorbis subcarinatus (Montagu) : E. Forbes & Heinley, Hist. Brit. 

 Moll., vol. ii, p. 541, fig. 



Itam's Clilf Pt., common on rocks at low tide, Aug. 1887 (w.ii.). 



Skeneidae. 

 Skenea planorbis (Fabricius) : E. Forbes & Hanley, Hist. Brit. Moll., 

 vol. iii, p. 156, fig. 



Common among the roots of seaweeds, and corallines, rocks under 

 tlie Hoe ; Drake's I. ; etc. (r.a.t.). 



Capulidae. 



Capulus HUNGARICUS (Linmeus) : /. (/. Jeffreys, Brit. Conch., vol. iii, 

 p. 269, fig. 



Occasionally on gravel grounds, 15-35 fms., generally attached 

 to Pecten ojyereularis (s.P.): Mewstone Gds., occasionally on 

 P. opercularis (r.a.t., S.P.) : Eddystone Gds. (e.j.a., s.p.). 



Breeding : Jan.-Mar. (w.g.). 



