44 



ADDITIONS TO "BRITISH CONCHOLOGY." 



By y. T. MARSHALL. 



Part VII. {coniinued from vol. 14, p. J2p). 



Littorina littorea L. — 



var. brevicula Jeft'. — There is little difference in the adult stage 

 between this and the var. paiipercula., though it is more apparent in 

 the young. A globular form of the type also resembles this variety. 



var. elegans S. Wood, Crag Moll., vol. i., p. 118, tab. x., fig. i4d. 

 — This name is prior to that of var. tttr7^iia Jeff., conferred on the 

 same shell. 



var. antiqua S. Wood, Crag Moll., vol. i., p. 118, tab. x., fig. 14a. 

 — -In this variety the spire is abnormally elongated, and it has the 

 same length and breadth as var. elegaiis, but the whorls are com- 

 pressed instead of scalariform. P'ound by JMr. James Simpson in the 

 Ythan estuary, Aberdeen ; not uncommon. 



monst. sinistrorsum Jeff. — A reversed specimen has been 

 recorded by M. Dautzenberg,'^ which he considered to be unique; 

 but the Jeffreys' collection contained three, and I know of one other, 

 though none have been discovered in recent years. Gwyn Jeffreys 

 has recorded two examples which he obtained from Billingsgate 

 market,'' and having subsequently heard of a third he proceeded to 

 the market and offered 5/- for it, but the possessor held out for 7/6, 

 which Jeffreys refused to give. This came to the knowledge of Mr. 

 Rich, a dealer, who acquired it for 7/6 and promptly sold it to Mr. 

 Leckenby for ^^5. The fourth was found by another Billingsgate 

 salesman in a casual way, and came to the knowledge of Mr. Baxter, 

 the chief merchant in Billingsgate, who was an old friend of Gwyn 

 Jeffreys, and was indebted to him for some valuable advice as a co- 

 shareholder on the failure of the Albert Insurance Co. Mr. Baxter, 

 after some haggling with the possessor, secured the prize for 30/-, and 

 one day took it out of his vest pocket and handed it to Jeffreys as a 

 present. This specimen is a fine one, but minus the operculum, and 

 has become polished by too long attrition in Mr. Baxter's pocket. 



A correspondent'' of this journal has recorded the discovery of a 

 pearl " under the mantle " of a Z. Hflorea, and writes that " it is 2 mm. 

 in diameter, of a pale horn colour, almost spherical, and slightly 

 translucent, similar to the small brown seed-pearls frequently found in 

 Unio margaritifer.'' He then adds that it is "the first time that a 



1 Bull. Soc. Zool. de France. 1914, toI. 39, p. 50. 



2 Brit. Conch., vol. iii., p. 370. 



3 Jonrn. o/Conch., 1916, vol. 15, p. 10. 



