HARGRP:AVES : MARlNli MOI.l.USCA OF YORKSHIRE COAST. 89 



var. villosiuscula Macgillivray. — Scarborough (Bean, Sc. Mus.). 



Thracia convexa (W. Wood). — Off Scarborough, young (Jeff.). 



Cuspidaria cuspidata COlivi). — Dogger Bank, in mud, 45 

 fathoms, seventy-five miles from Scarborough (L. & M.). 

 var. curta Jeff. — Dogger Bank, 35 fathoms (Marshall). 



Dentalium entalis Linnd — Common in deep water, 

 var. infundibulum Jeff.— Dogger Bank (L. & M.). 



Dentalium vulgare DaCosta. — Scarborough (Bean). 



Patella vulgata Linne'. — In immense numbers all along the 

 coasts north and south of Scarborough. It is gathered largely for 

 bait by fishermen, and is known locally as the "flither." Fishermen 

 distinguish two kinds of " flithers," rejecting P. depressa as too hard 

 and tough for bait. 



var. picta Jeff. — Scarborough, common, 

 var. intermedia Knapp. — -Scarborough, 

 var. coerulea Linnd. — Scarborough, common. 



Patella depressa Pennant. — Tees mouth (D.F.) ; Saltburn, 

 common (M.L.T.) ; Scarborough and Filey, common. 



Patina pellucida (Linne). — Common. 



var. lasvis Pennant. — -Redcar (W.C.H.); common, Scarborough 

 and Filey. 



Acmsea testudinalis (Miiller). — Dogger Bank (L. & M.) ; 

 Redcar (VV.C.H.); Saltburn, fine (VV.C.H.); very common, in great 

 variety, Sandsend (M.V.L.) ; in suitable localities between tide marks, 

 Scarborough to Flamborough. In 1875 Leckenby recorded it from 

 the Dogger Bank, and stated that up to that time its most southerly 

 record was Hartlepool. It is not in Bean's list, and is evidently 

 extending southward with great rapidity. I have known it at Scar- 

 borough for twenty years and it is now known south of Bridlington. 



Acmaea virginea (Miiller). — In similar localities to A. testudinalis 

 but more abundant. It prefers the pools and, unlike A. testudinalis, 

 is rarely left dry. 



var. lactea Jeff. — Scarborough (Bean). 



Puncturella noachina (Linne). — Dogger Bank (Brady) ; 30 

 fathoms (L. & M.) ; Scarborough (Bean). 



Emarginula fissura (Linne). — Dogger Bank (L. & M.) ; Redcar 

 (D.F.); Saltburn, one (M.L.T.) ; very rare, dead on rocks, both bays, 

 Scarborough, 



Fissurella graeca (Linne). — Redcar (Ferguson, fide Victoria 

 History). I have been unable to verify this record, which I regard as 

 a doubtful one. 



Eumargarita helicina (Fabricius). — Redcar (D.F.) ; a few in 

 shellsand, Sandsend (M.V.L.) ; at times common near low water mark, 



