104 PYRAMIDELLID.E. 



having a much broader base ; it is distinctly and deeply um- 

 bilicate in every stage of growth ; sometimes there are 5 ridges 

 on each whorl, at other times 3 only on the body-whorl and 

 2 on each of the other whorls, occasionally none on the body- 

 whorl and 2 or 3 on each of the upper ones, or else there are 

 no ridges at all and the whole surface is quite smooth and 

 glossy ; the suture is more deeply excavated, and nearly 

 straight ; this species has 12 whorls, and the mouth is more 

 round than oval. L. 0-25. B. 0*1. 



Habitat : Occasionally procured by dredging and 

 trawling, as well as by examining drifted shell-sand, 

 Aberdeenshire and the Hebrides (Dawson), Aberdeen 

 (Macgillivray) , Blackpool (Kenyon), Belfast (Hynd- 

 nian and Waller), Dublin Bay (J. G. J.), Bantry Bay 

 (Miss Hutchings, fide Leach, and Hanley), Barmouth 

 ( J. G. J.) , Tenby (Lyons and J. G. J.) , Langland Bay near 

 Swansea (J.G. J.), Bude (Lindsay) , Land's End (Hockin), 

 Falmouth (Cranch, fide Leach, and Hockin) , Plymouth 

 (Prideaux, fide Leach, and J. G. J.), Hastings (Leach), 

 and Guernsey (Hanley, Lukis, and J. G. J.). Coralline 

 Crag (S.Wood). Bohuslan (Loven and Lilljeborg, and, 

 in 12 f., Malm) ; Cattegat, 10-20 f. (Malm) ; Brittany 

 (Tasle and Cailliaud); Yigo Bay,8f., and Madeira(M f An- 

 drew); Gulf of Lyons (Martin); Algeria (Weinkauff). 



This shell is Brown's Turrit ell 'a minor, the type of which 

 I examined in the collection of the late Mr. Lyons at 

 Tenby ; but I certainly should not have recognized it 

 by the description. That gives the length as -| of an 

 inch, and the breadth "not an inch." The specific 

 name minor is obsolete and very incorrect. It is 

 apparently the Turritella nivea and T. nitida of Leach, 

 and perhaps also his Alvania glabra (according to Wood) , 

 and Alvania albella. Weinkauff described the present 

 species in the ' Journal de Conchyliologie ' for 1862 as 

 the Turritella umbilicata of Dunker. 



