VINE : NEW OK BUT LITTLE KNOWN EOCENE POLTZOA. 
53 
The general fades of the fauna is not that of the ordinary- 
London Clay, and it was not till I had seen the fine blocks in the 
Woodwardian Museum, Cambridge, obtained by Mr. H. Keeping, 
that 1 could understand the relegation of this deposit to the horizon 
assigned to them. I believe, however, that we have here a passage 
bed between the London Clay and the Bracklesham series. 
The Polyzoa occur chiefly on TurriteUa sulcifera, Fusus (Strep- 
sidura) pyrus, var. bulbus and Voluta athleta. 
Usually the adherent Polyzoa in the Eocene beds generally are 
rather confined to the number of species to which they attach them- 
selves ; Membranipora Lacroiocii seems to be an exception, as I have 
seen this species attached to Cerithium, Cominella desert um, Fusus 
trilineata, . . . Murex minax, and several Voluta species and other 
shells. Bijiusta eocena is chiefly attached to stones." 
The following species and varieties from the British Eocene 
fecks are all that are known up to date. 
I • 
Sub-order, Cyclostomata, Busk. 
1. Crisia sp. (eburnea?) London Clay. 
2. Idmonea coronopus Def. London Clay and Bracklesham. 
3. „ gracillima ? Pteuss. London Clay, Sheppy. 
4. Horn era (minuta) Vine. 
5. „ flabelliformis, Blainv. 
6. „ ramosa, d'Orbigny. Fareham, Hants. 
7. Lichenoporamediterranea? Blainv. ,, 
8. Ditaxia variabilis, d'Orb. „ „ 
Sub-order, Cheilostomata, Busk. 
9. Dittosaria Wetherelli, Busk. London Clay. 
10. Membranipora reticulum, Linn. ,, Fareham. 
= M. Lacroixii, Savg. (of authors.) 
,, ?crassa, Desm. Thanet sands. 
,, holostoma, Busk. 
11- var. perforata, Vine. London Clay, Fareham. 
12 Biflusta eocena, Busk. Bracklesham. 
Membkanipokella nitida, Johnston. 
13. ,, var. eocena, Vine. London Clay, Sheppy. 
