SUPPLEMENT.— LUDWIGELLA. lxxxv 



Series A — Ludwigella vera. 



1. Ludwigella impolita, 8. Buckman. Suppl., Plate XIX, figs. 25 — 27. 



Localities and Strata. — Dorset : Stoke Knap, in the Building Stone ; Bradford 

 Abbas, from a yellow marly bed, perhaps that above Paving Bed. 

 Date of Existence. — Bradfordensis hemera, perhaps. 



2. Ludwigella rudis (8. Buckman). Plate XV, figs. 11,12 (type) ; fig. 13; Suppl., 



Fig-. 47 in text. 



1889. Ludwigia rudis, This Monosrr., PI. xv, fis>s. 11 — 13. 



D 



( < 



Distinction. — From Ludl. impolita, thinner, and not such coarse < J) 



ornament. a b c 



Localities. — Dorset: Louse Hill; 1 near Halfway House, Slier- f Lud\vi g eiia rudis. 



borne ; Somerset : North Coker. pi. xv, fig^n!"^ 1 ; 

 Date of Existence.— Bradfordensis hemera, presumably. ta H^ST 



3. Ludwigella arcitenens, S. Buckman. Plate IV, figs. 1, 2 ; Suppl., Fig. 4G 



in text. 



1885. Hildoceras (Ludwigia) cornu, Haug, Monogr. Harp.; Neues Jalirbuch 



Mineral., Beil.-Bd. iii, pi. xii, fig. 11. 

 1887. Ludwigia cornu, This Monogr., PI. iv, figs. 1, 2. 

 1902. Ludwigella arcitenens, Emend. Amm. Norn., p. 4. 



Distinction. — From Ludl. rudis, more compressed, and the less pronounced 

 ornament. 



Localities and Strata. — Dorset: Wyke Quarry; Halfway House, in the Blue 

 Beds ; Bradford Abbas, in lower part of Fossil Bed. 



Date of Existence. — Concavi hemera. 



4. Ludwigella cornu (S. Buckman). Plate IV, figs. 3,4; Plate A, fig. 6; Suppl., 



Figs. 48—50 in text, 



1887. Ludwigia cornu, This Monogr., PI. iv, figs. 3, 4 ; and see syn., p. 20, 



under year 1881. 



Notes. — The specimen figured by my father is the one to which I first gave the 

 name, so that is really the holotype. Accordingly I give a figure of it now, a re- 

 production of a photograph. 



1 Presumably Bed 8, 'Quart. Journ. Geo). Soc.,' vol. xlix, p. 489. 



