116 



BRITISH CRETACEOUS BRACHIOPODA. 



1. Lhiffida sub-ovalis (rare). 



2. Argiope megatrema (very rare). 



3. Terebratella pectita (common). 



4. Terebrirostra lyra (not abundant). 



5. Megerlia lima. 



6. Terebratulina striata (var.). 



7. Terebratula squamosa. 



8. ,, ovata (common). 



9. „ obesa. 



10. Terebratula biplicata (very common). 



11. „ oblonga (very rare). 



12. Rhynchonella compressa. 



13. „ latissima (common). 



14. „ depressa, var. A and 5. 



15. ,, sulcata. 



16. ,, Grasiana (common). 



17. „ Mantelliana. 



At Cambridge, immediately above the Gault, we find a bed of Upper Green Sand, from 

 which Mr. Carter has obtained — 



1 . Argiope megatrema, Sow., = (decemcostata, 



Roemer) (rare). 



2. Megerlia lima (not very common). 



3. Terebratulina gracilis, var. rigida. 



4. Terebratula biplicata, var. Butempleana and 



var. obtusa (common). 



5. Rhynchonella sidcata (common). 



6. ,, lineolata. 



Other similar British localities have yielded species, but no where different from those 

 already enumerated. Nor have I yet been able to obtain any specimen of Brachiopoda 

 from the celebrated Blackdown beds, although several species have been more than once 

 erroneously mentioned as from that locality. 1 



Erom the Chalk Marl and Lower, Chalk we have obtained — 



1. Crania Ignabergensis (rare). 



2. Mag as pumila (rare). 



3. Terebratula squamosa. 



4. 



>J 



obesa. 



5. 



)) 



biplicata (rare). 



6. 



33 



sulcifera. 



7. 



J) 



semiglobosa (common) 



8. 



33 



Carteri (rare). 



And from the Chalk with flints — 



1. Crania Parisiensis. 



2. ,, Ignabergensis 



3. Thecidia Wether ellii. 



4. Argiope Bronnii. 



5. Magas pumila. 



6. Trigonosemus elegans (rare). 



7. Megerlia lima. 



8. Terebratulina striata. 



9. Terebratulina striata. 



10. ,, gracilis. 



11. Argiope Bronnii (1 example). 



1 2 . Rhynchonella plicatilis. 



13. ,, Mantelliana. 



14. ,, Cuvieri. 



15. „ Martini. 



9. Terebratidina gracilis. 



10. Terebratula obesa. 



11. ,, carnea. 



12. ,, semiglobosa. 



13. Rhynchonella plicatilis. 



var. octoplicatu. 

 var. Woodwardii. 



14. ,, limbata (sub-plicata) . 



And perhaps one or two others which I was unable to determine, so that eight or nine 

 species pass from Lower and middle Chalk into the Chalk with flints. 



1 Mr. Sharpe is of opinion that Blackdown Sands are older than the Upper Green Sand ('Quart. 

 Journ. of the Geol. Soc.,' vol. x, p. 187, 1853). 



