138 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. 



show that a certain number of these ranged downwards into Lower 

 Tertiary beds; and that 27 species were found in the FrenchTertiaries. 

 The following are the determinations which I believe to be wrong : — 



1 . himnea pyramidalis, Brard. It must have been by mistake that I 



referred this species to the L. cornea, Brongn. They are different. 



2. Melanopsis ancillarioides, Desh. This, again, is refen-ed in error to 



the M. buccinoides, Fer. M. Deshayes, however, mentions (Coq. 

 Foss. vol. ii. p. 21) that a variety of the latter, common in the 

 " Argile plastique" of Epernay, is found in the Isle of Wight. 



3. Corbida nitida. Sow. This is not the C. nitida, Desh., as the use of 



the same specific name led me to assume. 



4. *Cerithinm acutum, Sow. Non C. acutum, Desh. 



5. ventricosum, Sow. Non C. ventricosmn, Desh. 



6. funatum, Sow. C. variabile, Desh., figured by Sowerby from 



Newhaven and Hordwell, but since restricted to the former. 



7. Cytherea incrassata, Desh., must, I believe, be considered synonymous 



with the Venus incrassata, Sow. 



8. Cyrena cuneiformis, Fe'r. Quoted by M. Deshayes from Headon Hill ; 



but the Isle of Wight species is certainly not identical with the 

 Woolmch one. The latter appears to be the true C. cuneiformis of 

 Ferussac. The former is probably the C. semistriata, which again 

 M. d'Archiac had stated he had found at Woolwich. 



f). Cyrena deperdita, Sow. Non C. deperdita, Desh. 



10. obovata. Sow. Barton; the var. figured from New Cross does 



not apparently belong to that species. 



11. Paludina lenta. Sow. M. Deshayes gives it from the Isle of Wight 



and from the " Argile plastique " of Soissons. It appears, however, 

 that though very closely resembling the Woolwich sjiecies, it may 

 possibly be considered as a variety of that species. 



12. Potamomya plana, Sow. Figured from Plumstead, but afterwards 



quoted only from the Hampshire series. M. d'Archiac, however, 

 gives it from the " Argile plastique " of the Aisne, together with the 

 Tellina antiqua. Sow. 



13. Fusus labiatus. Sow. Quoted from both Hampshire and Woolwich ; 



the latter reference was subsequently dropt. 



With regard to the correlation of the Alum Bay and White Cliff 

 Bay sections. Prof. E. Forbes informs me that he has reason to question 

 my identification of Stratum No. 60 of the former locality with No. 36 

 of the latter. As far as I can judge, without revisiting the spot, his 

 reasons appear to me to he well founded. 



* I should also have given the Ceriihium margaritaceum, Sow., which is the 

 C. iiiDolutum, Lam. 



