HARGREAVES : MARINE MOLLUSCA OF YORKSHIRE COAST. 93 



Natica montagui Forbes. — Dogger Bank (Brady) ; abundant 

 and fine (L. & M.) ; rare (Parke) ; ofif Redcar (D.F.) ; frequently in 

 trawl ropes. 



var. albula Jeff. — Dogger Bank, 40 fathoms (L. & M.). 

 var. conica Jeff. — Dogger Bank, 40 fathoms (L. & M.}. 



Amauropsis islandicus (Gmelin).— Dogger Bank, exceedingly 

 rare, forty miles nortli-east by east from Scarborough (L. & M.); 

 one (Parke) ; Scarborough (Bean). It must be commoner than 

 indicated above, as I have had a fair number from trawlers. 



Lamellaria perspicua (Linne). — Scarborough (Bean), 

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



Velutina laevigata (Pennant). — Dogger Bank (Brady, L. & M.); 

 off Robin Hood's Bay, 30 fathoms (Brady) ; common in shellsand, 

 Sandsend (M.V.L.); living, Scarborough and Filey, but not common. 



Velutella flexilis (Montagu). — Scarborough (Bean). 



Bittium reticulatum (daCosta). — Dogger Bank (L. & M.) ; 

 beach at Redcar (D.F.) ; ofif Scarborough (Gosse). 



Cerithiopsis tubercularis (Montagu). — Scarborough (Bean). 



Scala turtonis (Turton). — Dogger Bank, 30 fathoms (Marshall) ; 

 living in shallow water (L. & M.) ; Redcar, from deep water (D.F.); 

 Scarborough (Bean) ; brought in by trawlers rarely. 



Scala clathrus (Linne). — Dogger Bank (L. & M., Rich); white 

 form, several, 40 fathoms, dead (Parke). 



Scala trevelyana (Leach in Johnston). — Dogger Bank (Brady) ; 

 off Robin Hood's Bay, 30-35 fathoms (Brady) ; not uncommon in 40 

 fathoms thirty miles from Whitby (Brady); Redcar (W.CH.); brought 

 in by trawlers. 



[Scala groenlandica (Chemnitz). — Bridlington sands, " possibly 

 not recent, but from the (Bridlington) Crag " (W.CH.)]. 



Scala COmmutata (Monterosato).— I have two specimens of 

 this species and Mr. Harinan has two others. These were obtained 

 amongst a number of other Sca/a from a fisherman on a trawler in 

 Scarborough harbour and were probably obtained between Scar- 

 borough and the Dogger, but as the species was not differentiated 

 till I saw it, no more precise locality can be given. 



Cioniscus aibidus G. Adams.— Scarborough (Jeff, and Bean) ; 

 very rare in South Bay in shellsand. 



Aclis ascaris (Turton).— Off Scarborough, 17 fathoms (Brady); 

 Scarborough (Bean) ; very rare in shellsand, Scarborough. 



Odostomia lukisi Jeffreys.— Dogger Bank (Jeff.). 



Odostomia conoidea (Brocchi).— Dogger Bank (L. & M.). 



Odostomia acuta Jeffreys.- Dogger Bank (Marshall) ; ofif 

 Scarborough, 30-35 fathoms (Brady); Scarborough (Marshall); in 

 shellsand, Scarborough, rare. 



