48 BRITISH OOLITIC AND LIASIC BRACHIOPODA. 



It is not improbable, that the specimens attributed by Roemer 1 and Pusch 2 to T. perovalis 

 belongs to T. insignis. 



Though small in England, in some continental localities it attains very large dimen- 

 sions. I have specimens from the Coral Rag of Nattheim Wurtemberg, sent me by 

 H. Krantz, measuring 3 inches in length and 2 in breadth ; it is found in many other 

 localities, such as in the Oxford Clay of Boulogne-sur-mer, where it was found by 

 M. Bouchard ; at Ecommoy (Sarthe), route de Gray, near Besancon ; La Latte, Apremont 

 (Ain), in the Coralline Oolite of Chatel-Censori, Tonnerre (Yonne), &c, and in many 

 German localities. The specimen figured in my plate is from the collection of Mr. Bean, 

 of Scarborough, who found it at Malton. 



45. Terebratula simplex, Buckman. Plate VIII, figs. 1, 3. 



Terebratula simplex, Buckman. 1845. Geol. of Cheltenham, pi. vii, fig. 5. 



— — Tennant. 1847. A Stratigraphical List of British Fossils, p. 74. 



Diagnosis. Shell inequivalved, longer than broad ; larger valve convex ; beak rounded, 

 recurved, and truncated by an entire foramen, thickly edged and concentrically furrowed, 

 advancing over the umbo, which is partly concealed, as well as the deltidium, which forms 

 a concave inward curve, transversally striated by minute lines ; no distinct lateral ridge ; 

 imperforated valve, moderately convex, flat, or slightly concave, especially towards the 

 front; surface smooth, finely punctuated. Length 2 inches 4 lines, breadth 2 inches 

 1 line, depth 1 inch 5 lines. 



Obs. This species, when young, seems to have its smaller valve flat, depressed, 

 nearly even ; this is also seen in some old shells, (Plate VIII, fig. 2,) the junction of both 

 valves forming in front an acute angle, but in general, in adult specimens, such as 

 Plate VIII, fig. 1, the upper valve is convex, though never very gibbous, much thickened, 

 and emarginate. This species is well characterised, but placed erroneously by M. D'Orbigny 

 as a synonym of Ter. lata (Sowerby), with which it differs in shape, form of beak, del- 

 tidium, &c. Ter. simplex is found in the pea-grit bed of the Inferior Oolite of Crickley 

 and Leckhampton Hills, near Cheltenham and Minchinhampton, and fine specimens are 

 preserved in the British Museum, and in the Collections of Dr. Wright, Messrs. Lycett, 

 Morris, &c. ; the largest specimens obtained as yet, fig. 1, is from the collection of the 

 Geological Society; figs. 2 and 3 were kindly lent me by Messrs. Buckman and Walton. 



46. Terebratula ovoiues, Sow. Plate VIII, figs. 4 — 9. 



Terebratula otoides, Sow. 1812. Min. Con., vol. i, p. 227, tab. 100. 

 — lata, Sow. 1812. Min. Con., vol. i, p. 227, tab. 100. 



1 Roemer. ' Dei Versteinerungen des Norddeutschen Oolithen-Gebirges, tafel ii, fig. 3. 



2 Pusch. 'Polens Palseontologie,' tafel iv, fig. 8, and perhaps fig. 5. 





