LACUNA CRASSIOR. 067 



slightly raised and blunt but rather prominent apex ; mouth large, expanded ; 

 outer lip thin, rounded, incurved. 



Dimensions. — L. •"> mm. B. 5 mm. 



Distribution. — Recent: coasts of Great Britain, Ireland, and Norway, Finmark, 

 northern and western coasts of France. Kiel, Corunna, Vigo. 



Fossil: Seise} 7 , Portland, Torbay, Bridgewater, Southampton, 

 Garvel Park, Clyde beds (common), Fillyside, Fort William, estuarine clays, Belfast, 

 Portrush. 



Remarks. — The specimen here figured was obtained at Garvel Park. L. 

 puteolus, which has a fairly wide range as a living shell, has been reported from 

 the Pleistocene deposits of Great Britain and Ireland. Jeffreys gives it from the 

 Norwich Crag in the Brit. Conch, on S. P. Woodward's authority, but this may 

 probably be a mistake. I cannot find a reference to it in any Crag list known to 

 me. 



Lacuna crassior (Montagu). Plate LIII, figs. 27 — 29. 



1803. Turbo crassior, Montagu, Test. Brit., pt. ii, p. 309, pi. xx, fig. 1. 



1853. Lacuna crassior, Forbes and Hanley, Brit. Moll., vol. iii, p. 67, pi. Ixxii, figs. 5, 6. 



1859. Lacuna crassior, G. B. Sowerby, 111. Ind. Brit, Shells, pi. xii, fig. 29. 



18G7 — 83. Lacuna crassior, Jeffreys, Brit. Conch., vol. iii, p. 344, 1867 ; vol. v. p. 205, pi. lxiv, fig. 2, 



1869 ; in Prestwich, Quart. Journ. Geol. Soc, vol. xxvii, p. 488, 1871 ; Proe. Zool. Soc, p. 109, 1883. 

 1872. Lacuna crassior, A. and R. Bell, Proe. Geol. Assoc., vol. ii, pp. 209, 213. 

 1878. Lacuna crassior, J. Reeve, Proe. Norwich Geol. Soc, vol. i, p. 70. 

 1892. Lacuna crassior, Locard, Coq. mar. Cotes de France, p. 194. 

 1898. Lacuna crassior, Posselt, Medd. om Gronl., vol. xxiii, p. 228. 

 1901. Lacuna crassior, Conch. Soc. List, Journ. of Conch., vol. x, p. 17, No. 324. 

 1908. Lacuna crassior, Kobelt, Icon, schalentrag. europ. Meeresconch., vol. iv, p. 74, pi. cxi, figs. 



27, 28. 



Specific Characters. — Shell turreted, bluntly angulated at the base, rather solid, 

 opaque ; whorls 6 — 7, slightly convex, somewhat angular above ; suture excavated ; 

 mouth rather large, expanded below, angulated at the base ; outer lip incurved ; 

 inner lip not united with the outer one. 



Dimensions. — L. 12 — 14 mm. B. 6 — 8 mm. 



Distribution. — Recent : British coasts, rather local, from low water mark to 50 

 fathoms, Channel Islands to Shetland, Spitzbergen, White Sea, Russian Lapland, 

 Greenland, Gulf of St. Lawrence, Normandy. 



Fossil : Icenian Crag : Bramerton. Pleistocene : Bridlington, 

 Kelsey Hill, March gravels. 



Remarks. — This northern species has been reported from Bramerton and 

 Kelsey Hill by Jeffreys and from Bridlington by A. Bell. One of the specimens 

 now figured (fig. 27), I found many years ago at March. Another (fig. 28) is a 

 recent shell from the Holmes Collection at the Norwich Museum. 



