﻿118 



SUPPLEMENT TO THE BRITISH 



that the shell does occur in our Middle Lias. It has been well described and illustrated 

 by Mr. E. Deslongchamps in his admirable work on ' French Jurassic Brachiopoda.' The 

 genus to which it should be referred must, however, still be considered as undetermined, 

 although, as seen by Mr. Deslongchamps' figures, the loop would bear more resemblance 

 to that of Terebratula, Terebratulina, and Platidia than to that of Kingena, to which genus 

 the shell is referred with some uncertainty by my distinguished friend. He, however, 

 justly observes that externally the shell bears a great resemblance to Kingena lima. 



In France T. Beslongchampsii occurs in the uppermost portion of the Middle Lias (la 

 Couche a Leptasna), of which it is a very characteristic species. It is very desirable that 

 a further search for British examples should be made. 



75. Terebratulina? granulosa, Bav. Dav., Ool. Mon., p. 18, PI. I, fig. 20; 



Sup., PI. XIV, figs. 11, 12. 



I was mistaken when I described in 1850 an incomplete valve of this species as a 

 Leptcena, and Mr. R. Tate was equally in error when he referred it to Placunopsis ( c Geol. 

 Mag.,' vol. vi, p. 550, 1854). Since 1850 Mr. C. Moore has found seven examples with 

 the interior of the dorsal valve partly preserved and showing that the shell is indubitably 

 a Braclnopod and perhaps closely allied to T. Deslongchampsii. The first attachment of 

 the loop to the hinge-plate was clearly visible in two specimens. 



These shells do not seem to have exceeded two lines in length, with a slightly greater 

 breadth ; the ventral valve is convex and somewhat flattened alons; the middle, the beak 

 slightly incurved, moderately produced and apparently truncated by a small foramen 

 separated from the hinge-line by two deltidial plates ; the dorsal valve is very slightly 

 convex, no fold or sinus being observable in either valve. The whole surface of the 

 shell is covered with minute, but visible granulations, arranged in radiating lines, and 

 especially so to some distance from the beaks. 



The shell is left provisionally in the genus Terebratulina, from which it will, in all 

 probability, have to be removed as soon as the internal characters have been better 

 ascertained. 



T. granulosa occurs in the Upper Lias of Ilminster. 



