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SUPPLEMENT TO THE BRITISH 



104. Terebratula Eudesi, Oppel. Dav., Ool. Mon., PI. XIII, fig. 4; and Sup., 



PI. XVII, fig. 4. 



Terebratula Eudesi, Oppel. Die Jura-Formation, p. 428, 1856. 



Shell globose, very slightly longer than wide ; valves very convex in their posterior 

 half, becoming almost gibbous. In profile the dorsal valve presents a very convex line to 

 within a third of the length of the valve, where it becomes gradually and slightly concave 

 till it reaches the front. The lateral marginal line is very sinuous, assuming an M shape 

 in front. There exists two rounded folds near the front, rather close together and 

 separated by a narrow sulcus. Corresponding with the sulcus, there exists in the 

 ventral valve a short rounded ridge or plait with a shallow sulcus on either side. The 

 beak is large and closely curved over that of the opposite valve, and truncated by a 

 small circular foramen. Surface smooth and scarcely marked by concentric lines of 

 growth. 



Length 12, depth 11 lines. 

 The type of this species was obtained from the Inferior Oolite at Dundry, and it is 

 questionable whether it is not the shell intended by Sowerby as his T. globata ; but as 

 some uncertainty on the matter seems to prevail I think it will be best to let the matter 

 rest as here detailed. 



105. Terebratula bdllata, Sow. Dav., Ool. Mon., PI. XI, fig. 19 ; and Sup., 



PI. XVII, fig. 5. 



Sowerby describes his species in the following words : 



" Spec. Char. Orbicular, ventricose, with a produced aud incurved beak ; front 

 indented ; depth greater than its width. A remarkably ventricose species ; from its 

 indented front there proceeds a little way towards the beaks an obscure furrow in each 

 valve ; the edges retain a, regular level ; in some states of preservation the worn surface is 

 minutely punctated, but this is seldom observable. It is distinguished from the globose 

 variety of T. digona, tab. 96, by the narrowness of its front. Collected in abundance 

 at Nunney, near Frome, by the Rev. J. Ireland ; it has also been found at Bridport." 



I have mentioned why this species should be separated from T. sphceroidalis, but it 



