llARGREAvfes : Marine MoLLUsdA oP VORksMlRfi coAsT. lot 



Trophon muricatus var. barvicensis Johnston. — Dogger Bank, 

 very fine, nearly an inch in length (L. & M.); coast of Yorkshire 

 (Jeff.); from trawlers. 



Trophon clathratus var. truncata Strom. — Dogger Bank 

 (L. & M.); Robin Hood's Bay 30-35 fathoms (Brady); Scarborough 

 (Bean); from trawlers ; Bridlington (W.C.H.). 



var. alba Jeff". — Dogger Bank, 30 fathoms (Marshall). 



Purpura lapillus (Linne). — Redcar, white and yellow vars., very 

 common (D.F.); Saltburn, Staithes (J.H.); Huntcliff, a banded form 

 (W.C.H.); very common, Sandsend ; very abundant along the rocky 

 shores north and south of Scarborough. Enormous examples have 

 been taken from Bridlington harbour, whilst the opposite extreme is 

 reached on the Scars at Kettleness ; eggs may be found during the 

 greater part of the year, even in December. Withernsea, Hornsea 

 (M.B.A.); The Den (T.P.). 



var. major Jeffreys. — Bridlington. 



var. minor Jeffreys. — Scarborough, Kettleness. 



var. ovalis Jordan. — Scarborough (Marshall). 



m. sinistrorsum — One in Bean's collection from Scarborough. 



Nassa reticulata (Linne). — Dogger Bank (L. & M.); Tees in 

 deep water (M.B.A.); Redcar, dead (W.C.H.); Scarborough (Bean); 

 Bridlington Bay (M.B.A.). 



Nassa incrassata (Strom).— Dogger Bank (Brady, L. & M.); 

 Teesmouth (D.F., J.H.); Redcar, very abundant (D.F., J.H.); Salt- 

 burn, Staithes (J.H.) ; very common, Sandsend (M.V.L.) ; common 

 on rocks at Scarborough and Filey. I have taken a variety almost 

 crimson, but it is very rare. 



var. minor Jeff. — Dogger Bank (L. & M.); Scarborough and 

 Filey. 



var. simulans Jeffreys. — Rare from trawlers ; Scarborough 

 (Marshall). 



Bela turricula (Montagu). —Dogger Bank (Brady); very fine 

 L. & M.); rare (Parke); common in shellsand, Sandsend (M.V. L.); 

 occasionally picked up on rocks at Scarborough. It is a common 

 species in trawl ropes and nets ; off Bridlington rather plentifully 

 (W.C.H.); throughout the offshore area (M.B.A.). 

 var. rosea M. Sars. — Dogger Bank (L. & M.). 



Bela trevelyana (Turton). — Moderately common off Robin 

 Hood's Bay (Brady); generally diffused throughout the North Sea 

 50-60 fathoms (L. & M.); Scarborough (Bean); sometimes cast 

 ashore, Scarborough, Whitby, and Filey (Marshall). I do not find 

 this species nearly as common as the preceding one. 



