2.S6 PLYMOUTH MAIJIXE INVERTEBRATE FAUNA. 



[ Pelecypoda— con<'?.] 



Anomia patelliformis, Liniifpus: J. (1. Jrffn//s, I'.iit. (.'unuli., vol ii, 

 p. :u, fig. 



Eddystone Gds., wherever suitable attachment is to be found, 

 least common on the fine sand grounds (e.j.a.). 



Arcidae. 

 Glycimeris glycimeris (Linnjeus) : ./. G. Jcfrei/.^i, Brit. Conch., vol. ii, 

 p. 166, fig. (as Pectunculus). 



Coninion in sandy and nnuldy gravel, 7-30 fins. (s.P.) : moder- 

 ately common on Mewstone Ledge in the patches of gravel between 

 the rocks and occasionally from the other grounds round the Mew- 

 stone ; Queen's Gd. ; Cawsand B. ; Kame-Eddystone Gds. (r.a.t.) : 

 Eddystone Gds. (e.j.a.). 



LiMOPSis aurita (Brocchi): -/. 0. Jeffrois, Brit. Conch., vol. ii, 

 p. 161, fig. 



Several dead shells (s.p.). 



Barbatia lactea (Linnffius): /. G. Jeffreys, Brit. Conch., vol. ii, p. 177, 

 fig. (as Area). 



Occasionally between tide-marks, among stones, etc., and in 

 15-30 fms., particularly on muddy gravel (s.p.) : Queen's Gd. 

 (R.A.T., S.P.) : lleny Eks., occasionally (r.a.T.). 

 Arca TETRAGONA, Poli : J. G. Jrffrqjs, Brit. Conch., vol. ii, p. 180, fig. 



Occasionally on all rocky shores, in crevices and among stones, 

 L.W.-30 fms. (s.p.) : not uncommon in rock crevices at Drake's I. 

 and Kuni B. : occasionally from the Bridge and Millbay Ch. (r.a.t.). 



Mytilidse. 



^Mytilus EDULIS, Linn;eus: J. G. Jeffreys, Brit. Conch., vol. ii, p. 104, fig. 



A^ery common on the coal-hulks moored in the Cattewater and 



on the piles of the Promenade Pier ; young specs, are common 



between tide-marks on the rocks below the Hoe and occasionally 



from Drake's T. and Asia Sh. (r.a.t.) : Yealm Sand-bank (s.p.). 



VOLSELLA barbata (Linna_*us): J. G. Jeffreys, Brit. Conch., vol. ii, p. 114, 

 fig. (as Mytilus). 



Occasionally between tide-marks, under boulders (s.P.): Asia Sh. 

 (r.a.t.). 



VoLSELLA PHASEOLINA (Philippi) : ,/. G. Jeffreys, Brit. Conch., vol. ii, 

 p. 118, fig. (as MytiluH). 



Not uncommon on the outside grounds in 15-30 fms.; occasion- 

 ally between tide-marks on the Breakwater and Drake's I.; Millbay 

 Pit (R.A.T.). 



MODIOLARIA MARMORATA (Forbes) : J. G. Jefrei/s, P)rit. Conch., vol. ii, 

 p. 122, fig. 



More or less common, buried in the tests of Tunicates; Millbay 

 Pit and Ch. ; Mewstone Ledge ; Yealm R. ; etc. (r.a.t., s.p.). 



Pteriidae. 

 Pteria HIRUNDO (Linnaeus) : U. Forbes & Hanley, Hist. Brit. Moll., vol. ii, 

 p. 251, fig. (as Avicula tarentina). 

 Very rare from the offing (r.a.t.). 



