STRATIGRAPHICAL DISTRIBUTION. 1 1 i 



'2. T/iecidium Wetherellii, Morris? (not abundant). This identification is founded on the 



examination of several ventral or dental valves found adhering 

 to Tereb. depressa (Lamarck), Briozoa, &c. The characteristic 

 or dorsal valve not having hitherto been discovered in the 

 locality, the identification may still be considered incomplete, 

 although there is every probability of its being the same as 

 that described by Mr. Morris from the Chalk of Kent. 



3. Terebratella Menardi, Lamarck, sp. (common). This Upper Green Sand species has 



also been discovered (by Mr. Wiest) in the Scaphites bed at 

 Chardstock, in company with other well-known Upper Green 

 Sand Brachiopoda; but I differ with Mr. Sharpe in his 

 assertion that Leymerie's var. oblongata (' Mem. Soc. Geol. 

 France,' vol. v, pi. 15, fig. 12) is found at Farringdon. 

 T Menardi (T. truncata, Sow.), from Little Coxwell, is a less 

 developed race, but perfectly agrees in character with the true 

 Lamarckian type found at Mans (France). 



4. Terebratula biplicata (Brocchi). Not abundant, but exactly similar to those so common 



in the Upper Green Sand of Warminster, and the Chloritic 

 Marl of the Isle of Wight. 



5. „ Tornacensis, var. Rozmeri? D'Archiac (very common). Mr. Sharpe's views 



on this point differ somewhat from my own. That 

 gentleman considers Viscount d'Archiac's T. Rcemeri 

 specifically distinct from the same author's T Torna- 

 censis ; but I agree with M. d'Orbigny and others 

 while stating that T. Rcemeri is only a difference of 

 age or variety of T Tornacensis, and am of opinion 

 that the shells described by Mr. Sharpe as T. Rcemeri, 

 from Farringdon, are nothing more than a dwarf race 

 or variety of the full-grown T. Tornacensis ; this view 

 may perhaps prove erroneous, as well as that of my 

 placing T. Boubei, Keyserlingi, and revoluta of Mr. 

 Sharpe's list, among the varieties of T. Tornacensis. 



('). ,, depressa, Lamarck (common; a well-known Tourtia species). T. Nerviensis, 



var. E of Mr. Sharpe's list, appears to me to be nothing 

 more than a variation due to age. 



7. „ Robertoni, D'Archiac (rare). A Tourtia shell. 



8. ,, tamarindus, Sow. Very rare, only hitherto known in Lower Green Sand. 



9. „ oblonaa, Sow. Equally rare, and, properly speaking, a Lower Green Sand 



fossil. 



15 



