70 BRITISH OOLITIC AND LIASIC BRACHIOPODA. 



subsequently adopted by V. Buch, who both described and figured the shell. Few authors 

 have seemingly noticed it; and it is a rare species in England, where it has been found by 

 Mr. Moore in the Marlstone of Ilniinster, and appears also to occur in beds of the same age 

 near Cheltenham. In PL XIV, I have illustrated varieties, with two, three, four, and five 

 plaits, on the mesial fold. In France, it is found in Normandy, at Fontaine-Etoupefour, 

 near Caen, at Pinperdu, near Salins (Jura), at Allem, Bahlingen, and Neuffen, Wurtemberg, 

 &c, in Germany ; it is generally found in company with Bh. rimosa, into which it seems 

 sometimes to pass by insensible gradations. 



64. Rhynchonella rimosa, Be Buch, Sp. Plate XIV, fig. 6, 6". 



Terebratula rimosa, Be Buch, 1831. Petrifications Remarquables, pi. vii, fig. 5; 

 et 1834, Uber Terebrateln ; et 1838, Mem. de la Soc. G^ol. 

 de France, vol. hi, 1st ser., plate xiv, fig. 12. 



— — Zieten, 1832. Dei Versteinerungen Wiirttembergs, tab. xlii, 



fig. 5. 



— — Beshayes, 1836. Nouv. Ed. de Lamarck, vol. vii, p. 354, 



No. 70. 



— — C. Rouillier, 1837. Bull, de la Soc. Imp. de Moscou, No. 11. 



— — Morris. Catalogue, 1843. 



— — Bronn. Leth. Geog., 1837, p. 292, tab. xviii, fig. 6. 



— — Ibid., 1848. Index Pal., p. 1249. 

 Rhynchonella rimosa, B'Orb. 1849. Prodrome, vol. i, p. 239. 



Biagnosis. Shell more or less circular, almost spherical, generally as wide as long ; 

 valves convex, gibbous, deepest near the umbo ; beak acute, much recurved, almost 

 touching the umbo, and allowing very little space for the passage of the muscular fibres 

 composing the pedicle. The deltidial plates entirely surround the foramen, which is small, 

 and almost touches the umbo; hinge margin indenting the smaller valve; sinus and mesial 

 fold well defined, valves ornamented by a considerable number of small plaits, which, after 

 proceeding from the beak and umbo towards the middle of the valve, in most cases unite 

 by two or three, to form larger and deeper plaits or costse, which extend to the margin ; 

 thirteen or fourteen of these are visible on each valve; two, three, or four, forming the mesial 

 fold ; structure unpunctuated. Length 8, width 8, depth 6 lines. 



Obs. B. rimosa is distinguished from B.furcillata by its smaller dimensions and more 

 spherical form, it is much less wide than furcillata, its beak is more recurved and orna- 

 mented by fewer plaits ; these unite in a very irregular manner, some before others, while 

 a few either soon disappear or proceed from the umbo to the margin, without uniting into 

 large costae. MM. C. Rouillier and A. Vossinsky have proposed to establish a small 

 separate group for B. rimosa and B.furcillata, under the name of duplicate} to distinguish 



1 Etudes progressives sur la Palseontologie des Environs de Moscou. Bulletin de la Soc. Imp. des 

 Naturalistes de Moscou, annee 1847, No. 11. 



