BRITISH DEVONIAN BRACHIOPODA. 51 



Our English specimens are from the Middle Devonian of Lummaton, near Torquay, 

 and exactly agree with those from the Eifel and from Erance. One specimen was found by 

 Mr. Whidborne at Lummaton, and another may be seen in the Museum of the Torquay 

 Natural History Society. Dr. F. Sandberger has also sent me specimens of this Orthis 

 from the Middle Devonian of Skaly, Poland. 



46. Orthis tetragona, De Vern. Dav., Dev. Sup., PI. Ill, figs. 17, 17a. 



Orthis tetragona, De Vemeuil. Geol. of Russia, vol. ii, p. 179, 1845. 



— — C. F. Roemer. Rheinisch. Ueberg., t. 5, fig. 6, 1844. 



— — Schnur. Bescbreibung Eifel. Bracbiopoden ; PalEeontograpbica, 



von W. Dunker and H. V. Meyer, p. 214, pi. xxxvii, 

 fig. 8, 1856. 



Shell wider than long, semi-elliptical, broadly rounded anteriorly, gently indented in 

 front. Hinge-line straight, slightly less than the breadth of shell. Dorsal valve very 

 gently convex, with a median flattened depression, commencing at the umbo, and 

 widening as it gets to the front; hinge-area narrow. Dorsal rather more convex 

 than the ventral valve. Area narrow, divided by an open fissure. Surface of valves 

 covered with very fine, radiating, raised striae, with shorter ones interpolated between the 

 larger pairs. 



Length 11, breadth 12 lines. 



Obs. — Mr. A. Champernowne found five specimens of this species in a railway- 

 cutting one mile and three quarters west of Totnes, at Ashridge, in the Parish of 

 Harberton, and identified them with the 0. tetra(/ona of De Verneuil. Although larger, 

 Mr. Charapernowne's specimens agree with the figures published by Schnur. It may be 

 distinguished from 0. Mfliensis by its more numerous and finer striae. 



47. Orthis? Pengelliana, n. sp. Dav., Dev. Sup., PI. Ill, fig. 19. 



Shell transversely oval, wider than long ; valves very gently convex, deepest at the 

 umbo, posteriorly much flattened, the ventral one somewhat the deepest; no fold, 

 elevation, nor depression in either valve ; hinge-line straight, a little shorter than the 

 breadth of the shell ; beak slightly incurved ; area narrow, divided by an open triangular 

 fissure. Surface covered with numerous small, bifurcating, radiating, raised strise, 

 crossed by equidistant concentric lines. Interior not known. 

 Length 12, width 17, depth 2 lines. 



