MARSHALL: ADDITIONS TO "BRITISH CONCHOLOGY. " ft 



different from the same stage of T. striatus. Dr. Watson, who has 

 collected great numbers of both species, says they " can never be 

 confounded so long as the apex is recognisable." There are numerous 

 Continental varieties of both species, but they are mostly variations in 

 colour. 



T. miliaris var. pyramidata Jeffr. — Scilly, 35 f. (Smart and 

 others) ; Penzance. A monstrosity of the type from the Moray Frith 

 has a deep suture and convex base, corresponding to the form pre- 

 viously noticed of T. montacuti. 



T. granulatus Born. — The Diamond ground off Hastings 

 (Langdon) ! off Sanda Island, Clyde, a living specimen (Scott) ; off 

 Lundy Island (from trawlers). 



Var. lactea Jeff.— Scilly (Burkill and J.T.M.) ; Mount's Bay. 



T. zizyphinus L. — -The fry are not umbilicate in any degree, and 

 the top whorl is smooth, the next one having either spiral lines or 

 granules. Jeffreys says in his description that " the ridges on the 

 upper whorls are granulated," but this is the case only with some 

 specimens, and those usually dredged ; as often as not they have 

 plain ridges, or the sutural ridges only are beaded. When the whole 

 of the upper whorls are granulated they resemble the same stage of 

 T. granulatus, but the latter have the granules smaller and the rows 

 closer together, and especially the nodules appear in uniform oblique 

 rows when viewed with the apex upward. I think Mr. Barlee's "single 

 specimen" from the west coast of Scotland, named by Jeffreys var. 

 granulifera, may be an ordinary white one with the juvenile granula- 

 tions continued on to maturity. 



Var. lyonsii Flem. — Low-water mark in Cornwall and South 

 Devon, to nof. ; off Loch Don, Mull, living (A. Brown). 



Var. humilior Jeffr. — Clyde (A. Brown) ; Herm Island and 

 Torbay, low water ; Scilly ; Barra. This variety also occurs white 

 at Scilly. 



Var. laevigata J. Sow. — Llandulas and Menai Straits (J. Conch., 

 vol. 7, p. 27); Bull Bay, Anglesea, and Port Erin, Isle of Man 

 (Archer) ; Tenby. Many typical and white specimens are smooth 

 between the sutural ridges, but the main character of this variety is 

 its peculiar shape. It is figured in "British Mollusca," but not well; 

 the last whorl should be much more expanded. 



Var. elata Jeffr. — Off Aberdeenshire, in deep water (Simpson) ! 

 West Orkneys, 45 f. This variety is occasionally smooth, sometimes 

 white, and I have seen one specimen of the monst. scalariforme. 

 I have also a specimen which is thin, pearly, and highly iridescent, 

 still containing the animal and operculum, as described by Jeffreys in 



