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SUPPLEMENT TO THE BRITISH 



86. Rhynchonella nuciformis, Sow., sp. Dav., Cret. Mon., PI. XI, figs. 23 — 27 (not 



PL XII, fig. 27). 



Mr. Meyer considers the Lower-Greensand Rh. nuciformis, to be nearly allied to Rh. 

 Gibbsiana, and quite distinct from any of the Upper-Greensand shells found at Warminster ; 

 the greatest thickness in the Faringdon specimens being situated near the front, and the 

 greatest thickness of the so-called Rh. nuciformis of Warminster being nearer the hinge. 

 The ribs are rounded also. Specimens have been found at Faringdon and Shanklin ; 

 but I am not aware of this species having been met with at Upware. 



87. Rhynchonella Wiestii, Quenstedt, sp. Sup., PI. VIII, figs. 31, 31a, 31<5. 



Terebratula Wiestii, Quenstedt. Petref. Deutschlands, Brachiopoda, p. 166, pi. xli, 



fig. 52—54, 1871. 



Spec. Char. Almost circular, slightly wider than long ; valves almost equally convex 

 or deep ; mesial fold in dorsal valve of small elevation, commencing to rise at about half 

 the length of the valve ; sinus in ventral valve shallow ; beak slightly produced ; foramen 

 small, surrounded and separated from the hinge-line by a projecting tubular-shaped 

 deltidium ; beak-ridges strongly marked, leaving a flattened space between them and the 

 hinge-line. Surface of each valve ornamented by about thirty or thirty-two rounded ribs, 

 of which some six form the mesial fold. 



Obs, The species to which this shell most nearly approaches is the Rh. Grasiana 

 d'Orb., of which it may, perhaps, be a large variety. 



Position and Locality. Rh. Wiestii occurs, along with Rh. Grasiana, in the Chloride 

 Marl (Upper Greensand, beds " 2 " and " 3 " of Wiest) at Chardstock. It was also found 

 by Mr. Meyer in the same formation at Beer Head. 



88. Rhynchonella Upwarensis, Dav. Sup., PI. VIII, figs. 27 — 28b. 



Spec. Char. — Shell transversely oval, widest about the middle ; deep, gibbous, much 

 thickened at the frontal and lateral margins. Dorsal valve very convex, forming in 

 profile an elevated convex curve to within two thirds of its length, when it becomes 

 suddenly geniculated or bent, so as to meet the lateral and frontal margins of the 



