﻿Vol. 6 1.] CONTIGUOUS DEPOSITS OF GLAMOEGANSHIRE. 423 



The specimen figured in PL XXXIII was obtained from Bed 

 5 b (3), Lower Rhsetic. Section by the roadside near Bishton, 

 near Newport (Monmouthshire). 1 



Plicatula intus- striata, Emmrich. (PL XXXIII, fig. 1.) 



1853. ' Geognostische Beobachtungen aus den ostlichen bayerischen & den angrenz- 



enden osterreichischen Alpen ' Jahrb. der k.-k. geol. Reicbsanst. vol.iv, p. 376. 

 1853. Hauer, F. Ritter von, ' Ueber die Gliedevung der Trias-, Lias- und Juragebilde 



in den nordostlichen Alpen' Jahrb. der k.-k. geol. Reicbsanst. vol. iv, p. 738. 

 1864. Dumortier, E., ' Etudes paleontologiques sur les Depots jurassiques du Bassin 



du Rhone : pt. i — Infralias ' pp. 74-77 & pi. i, figs. 13-16. 

 1861. Ostrea interstriata, Moore, C, ' On the Zones of the Lower Lias & the 



Avicula-contorta Zone ' Quart. Journ. Geol. Soc. vol. xvii, p. 501 & pi. xvi, 



fig. 25. 



This lamellibranch is too well-known to require any additional 

 description, but it has not been recorded previously from the Penarth 

 or Barry districts ; only from beds of later date to the west, as at 

 Bridgend and near Sutton. At Lavernock it is fairly common, while 

 at Barry it is very abundant in the White Lias. I have not recorded 

 it from the Lower Rhaetic in Glamorganshire; but that it does 

 occur abundantly in that stage at certain localities (Watchet, for 

 example) I have been able to satisfy myself only recently (June 

 1905). At Blue Anchor, near Watchet, it is associated with Pterin 

 (Avicula) contorta. 



Plicatula hettaxgiensis, Terquem. (PI. XXXIII, fig. 2.) 



1855. ' Paleontologie de l'Etage inferieur de la Formation liasique de la Province de 



Luxembourg, Grand-Duche (Hollande), et de Hettange ' Mem. Soc. Geol. 



France, ser. 2, vol. v, p. 326 & pi. xxiv, figs. 3-4. 

 1864. Renevier, E., ' Notices geol. & paleont. sur les Alpes vaudoises : I — ' Infralias 



& Zone a Avicula contorta (Etage Rha3tien) ' pp. 38-39 & pi. iii, fig. 4. 

 1864. Dumortier, E., ' Etudes paleontologiques sur les Depots jurassiques du Bassin 



du Rhone : pt. i — Infralias ' pp. 73-74 & pi. xii, figs. 4-7, 10. 



Plicatula liettangiensis has not been recorded previously, to mj T 

 knowledge, from the White Lias of this county. It is very common 

 at Coldknap, Barry, and Lavernock, and it is difficult to understand 

 how this Plicatula has managed to escape detection for so long a 

 time. It is quite possible, however, that it has been recorded 

 under another name {Ostrea multicostata ?) . A specimen submitted 

 for examination to the lie v. J. E. Blake was at once identified with 

 Terquem's fossil. 



As remarked by Terquem (op. cit. p. 326), and later by Prof, 

 llenevier (op. cit. p. 77), this shell presents several varieties in form. 

 One specimen from Barry agreed precisely with the figure given 

 by the latter author. 



Lima valoniensis (Defrance). (PL XXXIII, fig. 3.) 



1825. 'Memoire geologique sur quelques Terrains de la Normandie occidentale 

 par M. de Caumont, Mem. Soc. Linn, du Calvados [postea de Normandie] 

 vol. ii, p. 507 & Atlas, pi. xxii, fig. 7. 



This fossil is of frequent occurrence in the White Lias at Laver- 

 nock and Barry. A specimen submitted to Dr. A. Vaughan for 



See Quart. Journ. Geol. Soc. vol. lxi (K05) p. 378. 



