NEWTON: MOLLUSCAN REMAINS IN ENGLISH KEUPER. 413 



species recorded by Albert! f from the continental Keuper do 

 not possess this peculiar ornamentation. It is, however, with 

 much hesitation that I attach this generic name ; but, as a tem- 

 porary measure, and for the sake of convenience, it may be 

 regarded as Nucula (?) Keieperina, the specific designation being 

 of service in fixing its stratigraphical position. 



The specimen (fig. 4) was collected by Mr. E. P. Richards, 

 and is now in the collection of the Geological Museum (No. 

 4979)- 



Nicciila (?) Keiiperina. 



Fig. 4. 

 (Enlarged twice). 



Fig. 5. 



(Enlarged twice). 



Conclusion. — The unsatisfactory nature of these Keuper 

 shell-relics has compelled me to place them under somewhat 

 provisional determinations, though their uniqueness, as illustrat- 

 ing the first proofs we possess of a moUuscan fauna from this 

 formation, is a sufficient excuse for having stamped them with 

 doubtful generic designations. Until better specimens are 

 available, the present record may be of interest in adding some 

 further facts to the faunistic list of British Triassic rocks. 



I wish to thank Mr. George Sharman, palaeontologist of the 

 Geological Museum, for having directed my attention to Mr. 

 Richards' specimens in that institution, the existence of which 

 I was ignorant of until quite recently. 



t Ueberblick fiber die Trias, &c., 1864. 



A 3 



