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SUPPLEMENT TO THE BRITISH 



84. Terebratula Joassi, Dav. Sup., PI. XV, fig. 4. 



Terebratula Joassi, Dav. Quarterly Journal Geol. Soc, vol. xxix, p. 196, pi. viii, 



figs. 3 and 3 a, 18/3. 



Spec. Char. — Shell longitudinally oval, broadest anteriorly, slightly tapering at the 

 beak. Valves very moderately convex, without fold or sinus. Beak small, incurved, 

 and truncated by a small circular foramen, slightly separated from the hinge-line by a 

 deltidium in one piece. Dorsal valve sometimes very much flattened. Surface smooth, 

 marked with concentric lines of growth. Loop not known. 



Length 1 inch 9 lines ; width 1 inch 7 lines ; depth 7 lines. 



Obs. — The species which this shell most nearly approaches is the T. ovoides, Sow., 

 T. rex, Lankester, but it differs from it in the absence of any mesial depression in the 

 dorsal valve, and carination of the ventral one. 



Position and Locality. — T. Joassi was discovered by Mr. Judd, in the Upper Oolite, 

 of Garty, Sutherland. 



85. Terebratula bisuffarcinata, Zieten, non Schloth. {?). Sup., PI. XV, figs. 1, 2, 3. 



Terebratula bisuffarcinata, Zieten. Verst. Wiirt., p. 53, pi. xl, fig. 3, 1834. 



— perovalis, Dav. The Geologist, Dec, 1862, p. 445, pi. xxiv, fig. 8. 



— bisuffarcinata, Quenstedt. Die Bracbiopoden, p. 394, tab. xlix, 



figs. 22—40, 1871. 



— — Dav. Quarterly Journal Geol. Soc., vol. xxix, p. 197, 



pi. viii, fig. 5, 1873. 



Spec. Char. — Shell generally longer than wide, valves moderately convex, and almost 

 equally deep. Dorsal valve uniformly convex to about two thirds of its length, from the 

 umbone ; front gently raised either in a simple flattened fold, or moderately biplicated, 

 a wide shallow longitudinal depression existing between them. Beak of ventral valve 

 moderately incurved, and truncated by a circular foramen, margined laterally by a short 

 deltidium. Surface smooth, marked only by concentric lines of growth. Loop 

 simple and short (as in T. perovalis). Proportions variable; a large specimen 

 measured 2 inches 2 lines in length, l^inch in breadth, aud 1 inch in depth. 



Obs. — In 1820, at page 279 of his 'Die Petrefactenkunde,' Schlotheim describes a 

 Terebratula under the designation of Terehratulites bisuffarcinata, Avith the following 

 references to figures: — Knorr, T. 11, T. B. IV, fig. 2, and Ency., t. 239, fig. 3 a, b ; 



