JURASSIC AND TRIASSIC BRACHIOPODA. 197 



Rev. E. R. Lewis on the eastern slope of Mount Hermon (Lebanon), Syria. Dr. Fraas, 

 who identified the specimens, states them to be Oxfordian. 1 



In some of the specimens I have seen from that locality the valves were extremely 

 convex, while in others they were very moderately so. 



184. Rhtnchonella Boueti, Dav. Sup., PI. XXVI, figs. 15, 16. 



Rhynchonella Boueti, Dav. Annals and Mag. of Nat. Hist., vol. ix, 2nd ser., 



pi. xiii, figs. 4, 5, 1852. 



Shell somewhat triangular or sub-pentagonal, wider than long. Valves moderately 

 deep, the dorsal most convex, and divided into three lobes, of which the central one 

 forms an elevated and well-defined mesial fold, somewhat laterally contracted, with a 

 deep corresponding sinus in the ventral valve ; beak acute, not much produced, with a 

 small circular foramen under its angular incurved extremity, margined, and slightly 

 separated from the hinge-line by narrow deltidial plates ; beak-ridges well defined, 

 leaving a slightly concave false area between them and the hinge-line. Surface ornamented 

 by a variable number of angular ribs, about thirty in each valve, of which from four to 

 seven occupy the fold and sinus. 



Length 1 inch, width 1 inch 2 lines, depth 7 lines. 



Obs. — This species was first found by myself in the upper portion of the Great 

 Oolite at Ranville, near Caen, where it is common. It occurs in the same locality with 

 Rh. obsoleta, from which, however, it is easily distinguished, more particularly by its 

 much more elevated and pinched-in mesial fold. It is also comparatively more transverse 

 and trilobed. 



It occurs in great abundance in the Bradford Clay, in company with Wold, digona, 

 a small variety of Ter. intermedia and Ter. coarctaia, at Burton Bradstock, near and 

 north-east of Bridport in Dorset, where it was discovered by Mr. Darell Stephens. It 

 was also found by Mr. J. F. Walker to be a common fossil in the Cornbrash at Laington, 

 near Weymouth, where it is likewise associated with the same small variety of Ter. 

 intermedia. R. Boueti is allied to Rh. trilobata, Quenstedt. It also bears some 

 resemblance to certain species of Cretaceous Rhynchonella . 



1 See ' Geol. Mag.,' new series, vol. iv, p. 159, April, 1877. 



