BONES OF EXTINCT QUADRUPEDS IN ANCIENT RIVER DEPOSITS. 555 



which having proceeded from the E.N.E., is exclusively charged with terrestrial and 

 fluviatile remains. 



Mr. H. E. Strickland is the discoverer of these ancient fluviatile deposits, which 

 extend from Warwickshire into the valley of the Severn, near Tewkesbury. He has 

 found the remains of twenty-four species of fluviatile shells, three of which are con- 

 sidered to be extinct, and the bones of several species of extinct quadrupeds in the 

 gravel of the valley of the Avon, an eastern tributary of the Severn. (See Geol. Proc. 

 v. ii. p. 111.) Let us now see whether this phenomenon be reconcileable with the view 

 here given, of the comparatively recent period at which the valley of the Severn is sup- 

 posed to have lain under the sea. The accumulations at and near Cropthorn constitute 

 terrace-like hillocks, from one to four miles distant from the present bed of the Avon, 

 above which their summits rise to a height of forty to fifty feet. Mr. Strickland has traced 

 these accumulations, which he first termed "fluviatile diluvium," at intervals from Law- 

 ford in Warwickshire, to Defford in Worcestershire, and he has proved that they follow 

 more or less the course of the present Avon from north-east to south-west. I refer to his 

 interesting paper, shortly I hope to be published at length, for the details presented at dif- 

 ferent localities, it being sufficient for the present purpose to state the general results 1 . 



v. r. denotes very rare ; r. rare ; c. common. 



Aquatic. 



12. Planorbis complanatus 



r. 



13. 



lateralis (Strickland) c. 



1 The following is a list of the shells found here. 

 Terrestrial. 



1 . Helix virgata v. r. 



2. pulchella r. 



3. Pupa marginata .„ r. 



4. pygmaea v. r. 



5 . Succinea amphibia r. 



Aquatic. 



6. Lymncea palustris v. r. 



7. fossaria r. 



8. peregra r. 



9. cunicularia v. r. 



10. Planorbis nautileus v. r. 



11. Planorbis vortex r. 



The valves of a Cypris also occur. 



The Paludina minuta, Planorbis lateralis, and Unio antiquior, appearing to be extinct species, have been named 

 and described by Mr. Strickland : all the others are existing and indigenous to Britain. 



The bone3 which occurred here belong to the following animals : 



1. Hippopotamus. -\ 



2. Bos Urus. 



3. Cervus. ^All of extinct species. 



4. Canis. 



5. Ursus. 



The parts of these accumulations which Mr. Strickland has traced for many miles into the upper parts of 

 Warwickshire must doubtlessly have been of purely fluviatile origin. 



14. Ancylus lacustris v. r. 



15. fluviatilis « v. r. 



16. Valvata fontinalis c. 



17. Paludina tentaculata c. 



18. Paludina minuta (Strickland) r. 



19. Cyclas Henslowana c. 



20. amnica c. 



21. cornea c. 



22. Anodon anatinus ,, c. 



23. Unio ovalis (Fleming) c. 



24. antiquior (Strickland) r. 



