JURASSIC AND TRIASSIC BRACHIOPODA. 145 



" Found in stone excavated for the alterations and improvements of the road between 

 Nunney and Frome, by my kind friend the Rev. John Ireland, who first pointed it out 

 as distinct." These quarries are in Green Pits Lane near Nunney and are now closed. 

 Mr. Walker, however, found a worn specimen of the species there last year among the 

 debris of the quarry. 



This variety varies considerably in shape, for some specimens are regularly oval and 

 uniformly convex, the mesial fold being almost obsolete, while in others there exists every 

 gradual passage into the slightly pentagonal shape and denned fold. In the ventral valves 

 there appears to exist a shallow median sinus. The external surface is covered with 

 numerous, fine, radiating, slightly raised lines, which are closely intersected by concentric 

 lines, giving a finely imbricated appearance to the surface, but not so spinulose as in 

 true T. coarctata. This form occurs in the Inferior Oolite near Frome, and good 

 examples may be seen in the Museum of the School of Mines, and in the collection 

 of Mr. J. F. Walker. I believe one of Smith's original specimens is in the British 

 Museum. Mr. J. F. Walker recently found a very fine specimen (Sup., PI. XXV, fig. 3) 

 in the Fuller's-earth Oolite in the road-side cutting near Whatley Church, associated with 

 T. ylobata, Wald. bullata, and Bhynchonella varians, var. Smithii} The variety is 

 closely related to Terebratula l/ybrida, ' E. Desk, Pal. Franc.,' pi. lxvi,, figs. 1 — 6. It 

 differs, however, from these figures in having the smaller valve more rounded and the fold 

 less conspicuous. T. hybrida occurs in the Inferior Oolite of Calvados. 



120. ? Terebratula infra-oolitica, E. Desl. Dav., Sup., PI. XVIII, figs. 8, 9. 



Terebratula infra-oolitica, E. Desl. Bracb. Jur., Pal. Franc., p. 210, pis. lviii, 



lix, fig. 1, 1864. 



Shell somewhat sub-pentagonal, longer than wide, broadly rounded anteriorly and 

 slightly indented in front, tapering posteriorly ; valves moderately convex. In the dorsal 

 valve a moderately elevated and gently biplicated fold occupies the central portion of the 

 anterior half of the shell, the two rounded plications are rather close together, with a 

 narrow sinus between them. In the ventral valve a slightly raised fold commences about 

 the middle of the valve and extends to the front, a narrow concave groove being 



1 It has doubtless been observed that various figures of specimens of the same species have been 

 occasionally drawn on different plates, and sometimes out of their regular order. This arrangement has 

 been necessitated by my desire of always giving figures of the best obtainable examples of any species, and 

 as specimens have been coming in up to the moment of sending to press and during the drawing of the 

 plates, I have been compelled to place them in the best available positions. During the three years this 

 Supplement has been in preparation I have been most zealously assisted by several friends, whose names 

 are recorded in the work, and to whom I would again tender my warmest acknowledgments. 



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