﻿JURASSIC AND TRIASSIC BRACHIOPODA. 



139 



does not seem to differ very much from T. Eudesi; and it is still questionable whether the 

 last named species (?) is more than a variety of T. bullata. 



T. bullata does not generally seem to have much exceeded 12 lines in length by 10 

 in width, and about the same in depth. 



It has been found by Mr. J. F. Walker in the Fuller's Earth at Orchardligh, in 

 Somersetshire. 



106. Terebratula Fileyensis, Walker, MS. Sup., PI. XIV, figs. 22—24. 



Shell sub-pentagonal, a little longer than wide, broadest about the middle. Valves 

 convex, of about equal depth. Sides broadly rounded, slightly indented in front. 

 Dorsal valve somewhat ventricose, and gently biplicated near the front, with a shallow 

 concave groove between the two small rounded ribs. Ventral valve nearly uniformly convex, 

 the slightly marked concave depressions corresponding with the two ribs in the opposite 

 valve are very shallow. Beak moderately projecting, incurved, and truncated by a circular 

 foramen, slightly separated from the hinge-line by two very small deltidial plates. Hinge- 

 ridges scarcely defined. Surface smooth, marked by a few concentric lines of growth. 

 Length 13, width 11, depth 9 lines. 



05s. — This species (?) is more pentagonal in shape than is either T. bullata or T. 

 globata, but is still closely related to both. It was found by Mr. J. F. Walker in the 

 Lower Calcareous Grit at Filey, on the Yorkshire Coast. 



107. Terebratula Ferryi, E. Desl. Sup., PI. XVII, figs. II 7, 8. 



Terebratula Ferryi, E. Desl. Brach. Jurassiques, pi. xcvi, 18/4. 



— — J. F. Walker. York Herald, October 9th, 1875 ; and Geol. 



Mag., 2nd ser., vol. ii, p. 572, 1875. 



Shell obscurely pentagonal, longer than wide. Valves almost equally convex or 

 deep ; dorsal valve strongly and sharply biplicated at its anterior half, a deep angular 

 sulcus existing between the two projecting folds. Some specimens show likewise a 

 tendency to the formation of a rib close to the posterior margin. Ventral valve with a 

 wide angular central rib and a deep sulcus on either side ; beak tapering, slightly incurved, 

 and truncated by a circular foramen, separated from the hinge-line by a narrow deltidium 

 in two pieces. Two specimens measured — 



Length 14, width 10, depth 9 lines. 



