66 LITTORINIDiE. 



that we cannot venture to rank it among our species of 

 Lacuna. 



'■'■ L. laliosa, LovJ;N ? Ovate-oblong, tapering, whitish, 

 rather soHd, with five whorls, very slightly convex, the 

 last occupying rather more than half the shell, and rounded 

 or very slightly carinated below. Outer lip a little ex- 

 panded, and thin at the edge, within which it is thickened 

 by a callosity which extends round the base of the aper- 

 ture uniting with the expanded columellar margin below. 

 Umbilical groove small. Length a quarter of an inch, 

 breadth one and a half tenths. — In sand at Cullercoats. 

 The shell is thicker and more slender than L. v'mcta, 

 and is somewhat intermediate between it and L. cras- 



We have figured likewise (pi. Ixxxvi. f. 8) one of the 

 two Northern specimens referred to, which perfectly agrees 

 with Loven's somewhat succinct description in the " Index 

 Molluscorum Scandinavise." The other has precisely the 

 shape of vincta, but the outer lip is pink and a little 

 thickened internally, so that its base is more broadly 

 confluent than usual with the columella, characters which 

 connect it with the delineated specimen, which is rather 

 solid and of an uniform pinkish colour externally. 



The animal was first described and figured by Philippi 

 in 1836, from specimens of the variety canalis. Through 

 the aid of Mr. Spence Bate we are enabled to give an 

 original figure taken from the form quadri/asciata. Dr. 

 Johnston describes it fully in the valuable " Transactions 

 of the Berwickshire Naturalists' Club.""' " It is of a pale 

 flesh-colour, the proboscidiform mouth reddish orange, the 

 sides and sometimes the head dusky or black ; tentacula 

 setaceous, contractile, the eyes on short pedicles (?*. e. bulg- 

 ings) at their base ; foot oval, rounded at both ends, 



