THE BKACHIOPODA. 27 



23. TEREBRATULA HOLLAND AE, S. S. BucJcman. 



1877. TEEEBRATULA FERRYI Davidson, (not T. Ferry i of E. Des- 



longschamps), Proceedings of the Dorset 

 Field Club, Vol. I., plate ii., fig. 5. 



1878. ,, FERRYI, Davidson (non E. Desl.), British. 



Brachiopoda, Palseont. Soc., Jurassic, Sup- 

 plement plate xvii., fig. 7, (not figure 8). 



Through the great kindness of Mr. Davidson, who procured 

 me three type specimens of lereb. Ferryi, E. Desl., from Nor- 

 mandy, I have been able to compare the French types with our 

 own forms. The result is that I find that the specimens figured 

 by Mr. Davidson in the above references do not at all agree with 

 the French types, so that I have therefore named this species 

 afresh. 



Tereb. Ferryi, E. Desl., is a rather globose form, having the 

 dorsal valve greatly convex. Its biplications are also rather 

 small, and some specimens have a third very small fold at the 

 base ; on the larger valve are two small furrows running up 

 about half way, opposite the two ridges on the dorsal valve, 

 beak incurved, foramen more or less round. 



Tereb. Hollandae, however, is not at all globose, has the smaller 

 valve rather flat, and the biplications are most marked, being 

 very sharp and angular like those of Tereb. Phillipsi. The 

 furrows extend about half way up the dorsal valve, and 

 about two-thirds up the ventral, and a small keel extends from 

 the beak all down the middle of the ventral valve. 



Dimensions. Length 12, breadth 8, depth 8 lines. 



Localities. This species is rather scarce. Bradford Abbas, 

 Clifton Maybank, and near Half-way House (Dorset). 



Obs. I have not been able to determine whether it really 

 occurs in the Humphriesianum zone or not. Its general position, 

 however, is the lower part of the Parkinzoni zone. 



