87 



No. 27. EIIYNCHONELLA PARVULA, E. Desl. Plate IV., fig. 14, 

 140, J, c. 



EHYNCHONBLLA PAEVTTLA, E. Desl. M. Ferry, Mem. Soc. Linn de 

 Normandie, t. xii. ; Note sur Te.tage JBajocien des environs de 

 Macon, p. 22, 1860 ; and Etudes critiques stir des Brachiopodes 

 nouveaux oupeu connus, t. 1 and 2, p. 29, pi. v., fig. 5-6, 1862. 



Shell small, sub-pentagonal, wider than long; dorsal valve 

 flattened and very slightly convex, divided into three almost 

 equal lobes, of which the central one forms a wide, flattened, 

 and sharply-defined mesial fold. The surface of this valve is 

 ornamented with about nine radiating, rather str'ong projecting 

 ribs, of these three occupy the fold. Ventral valve deeper and 

 more convex than the opposite one, with a wide shallow sinus, 

 and of which the central portion is occupied by two longitudinal, 

 angular ribs, four being present likewise on each of the lateral 

 portions of the same valve. Beak small, prominent, with a rather 

 large circular foramen, margined and slightly separated from 

 the hinge-line by a well-defined deltidium. The beak ridges 

 are sharply defined, leaving between them and the hinge-line a 

 flattened space. Length four, width five, depth two lines. 



Obs. This small, elegant shell exactly resembles the figure 

 given by Mr. E. Deslongchamps of his JRk. parvula. A few 

 specimens of it were obtained by Mr. Darell Stephens at Brad- 

 ford Abbas in Dorsetshire, where it does not seem to have 

 much exceeded the dimensions above given. It was found by 

 Mr. E. Deslongchamps in the Inferior Oolite at Milly (Soane et 

 Loire), also at Conlies (Sarthe), and at Argentin (Indre). 



No 28. KHYNCHONELLA STEPHANT, n. sp. Plate IV., fig. 13, 

 13fl, 5. 



Shell small, transversely oval, broadest posteriorly ; valves 

 almost equally deep ; dorsal valve smooth and uniformly convex 

 to about two-thirds of its length, when a wide, biplicated fold 

 is produced along with two or three wide but short ribs on each 

 of the lateral sub-marginal portions of the valve. In the dorsal 

 valve a wide and deep sinus extends from the middle of the 



