164 SUPPLEMENT TO THE BRITISH 



Obs. — In 1851, during a visit to Radstock, I picked up in the Middle Lias, at 

 Clandown quarry, several examples of a small flattened Waldheimia, which I was 

 unable to refer to any species with which I was then acquainted, and it was only last 

 year, during Mr. Deslongchamps' visit to Brighton, that I was informed that this small 

 shell was referable to his T. ( W.) Darwini. In his description of this shell he states that 

 it is a badly defined species, and so variable that it is difficult to assign to it any typical 

 form ; such is truly the case with our English examples, and I was glad to have at last 

 some name to give it. With us it does not appear to have much exceeded the 

 dimensions above given. In France it was found by Professor E. Deslongchamps in 

 the Middle Lias at May and Bretteville-sur-Laize, in Normandy. 



144. Waldheimia perforata, Piette. Sup., PI. XXIV, figs. 1, 2, 3, and 5 ?. 



Terebratula marsupialis, Zieten. Die Verst. Wiirttemb., p. 53, tab. xxxix, fig. 9 



(not T. marsupialis, Schloth., 1819). 



— perforata, Piette. Bull. Soc. Geol. de Trance, 2nd ser., vol. xiii, 



p. 188, pi. x, fig. 1, 1856. 



— psilonoti, Quenstedt. Der Jura., p. 48, tab. ix, fig. 21, 1856. 



— strangulata, Martin. Paleont. stratig. de l'lnfra-lias de la Bour- 



gogne, Mem. Soc. Geol. de Trance, 2nd ser., 

 t. vii, p. 9, pi. vii, figs. 8—10, 1860. 



— perforata, Oppel. Tiber die Brachiopoden der unteren Lias, p. 531, 



1861. 



— — Hebert. Bull. Soc. Geol. de France, 2nd ser., vol. xix, 



p. 102, 1861. 



— — R. Tate. Geol. Mag., vol. vi, Dec, 1869. 



— — E. Deslongchamps. Brach. Juras., p. 73, pi. ix, figs. 1 — 5, 



pi. xxiii, figs. 1—3, 1863. 

 Waldheimia Sarthacensis (part), R. Tate. The Yorkshire Lias, p. 418, pi. xv, 



figs. 10, 11, 1876. 



Shell longer than wide, sub-pentagonal, valves almost equally deep, without fold or 

 sinus, and somewhat flattened ; truncated, or straight in front ; ventral valve moderately 

 convex ; beak tapering, slightly incurved, and truncated by an oval foramen separated 

 from the hinge-line by a deltidium in two pieces ; beak-ridges sharply defined ; dorsal 

 valve gently convex, with sometimes a slight depression near the front ; surface smooth ; 

 loop long. 



Length 13, width 9, depth 6 lines. 



Obs. — At p. 418 of the ' Yorkshire Lias,' Mr. R. Tate observes that " whatever name 

 the species should receive, there is no doubt that it has long been known in this country, 

 having been confounded with T. ornithocephala by Sowerby as early as 1815, and by 



