ST. ERTH BEDS. 
63 
a quite different conclusion as to the age of the beds from that 
adopted by them. When, further, we take into account the 
physical conditions which must have prevailed while the clays 
were being deposited, as well as the list of species found in this 
small outlier, it appears to me that the depth of water there 
indicated must have been considerably greater than these observers 
have supposed. 
The following are the species recorded by Messrs. Kendall and 
Bell. The list is given as it stands in their paper, but a number 
of the specific names given by S. V. Wood, (jun.)* refer to MS. 
species as yet neither figured nor described ; these are conse¬ 
quently omitted from the tables at the end of this Memoir. 
Mollusca of the Pliocene Beds of St. Erth. 
Calyptrsea chinensiB, Jjinn. 
Ceritkium reticulatum. Da G., var. 
Chiton, sp. 
Columbella sulcata. Sow. 
Conovulus pyramidalis, J. Sow. 
Cyclostrema nitens, Phil. 
Cylichna truncatula. Drug. 
Cypreea avellana. Sow. 
Defrancia linearis, Mont. 
Eulima intermedia, Gantr. 
-polita, Linn. 
Fusus corneus,I/m'52.(=F.lignarius). 
Homalogyra atomus, Phil. 
Hydrobia terebellata, Nyst. 
- -^ YSir. conica. 
JefFreysia diaphana, Alder. 
-globularis, Jeff. 
Littorina subaperta, Wood. 
Mur ex, sp. 
Nassa granulata. Sow. 
-mutabilis, Linn. 
-, var. St. Erthensis. 
-recticostata, Bellardi. 
-serrataj^rocc/i'i (=K.reticosa, 
Sow). 
-solida, S. Wood. 
Katica millepunctata, Lam. 
-sordida, Phil. 
Odostomia acuta, Jeff. 
-clathrata, Jeff. 
-eximia, Jeff. 
---insculpta, Mont. 
-interstincta, Mont. 
-pallida, Mont. 
-plicata, Mont. 
-rissoides, Hanley. 
-spiralis, Mont. 
-unidentata, Mont. 
-(Chemnitzia) costellata, 
Gratelouy. 
-plicatula, 
Brocchi. 
Pleurotoma brachystoma, Phil. 
-costata. Da G. 
Pleurotoma costato-striata, S. 
Woodyjun. MS. 
1 Ringicula acuta, Phil. 
Rissoa Montagu!, Payr. 
-— partim-cancellata,/S'.TPood, 
jun. MS. 
-pentadonta, S. Wood. 
-reticulata, Mont. 
Skenea planorbis, Fabr. 
Trochus Adansoni, Payr. 
-adriaticus, Phil. 
-multistriatus, S. Wood, 
jun. MS. 
-- noduliferens, S. Wood. 
-zizyphinus, Linn. 
Turritella triplicata, Brocchi. 
Utriculus hyalinus, Turton. 
Artemis exoleta, Linn. 
Oardita aculeata, Poli. 
Cardium echinatum, Jjinn. 
-papillosum, Poli. 
-tuberculatum, Linn. 
-strigilliferum, S. Wood. 
Kellia, sp. nov. 
Lasea rubra, Mont. 
Lepton nitidum, Turt. 
Lucina borealis, Linn. 
Mactra solida, Linn. 
Montacuta bidentata, Mont. 
-ferruginosa, Mont. 
Mya arenaria, Linn. 
Nucula nucleus, Linn. 
-proxima ? Say. 
-sulcata, Bronn. 
Ostrea edulis, Linn. 
Pecten maximus, Linn. 
-opercularis, Linn. 
Pectunculus glycimeris, Linn. 
Solen ensis, Linn. 
Tapes aureus, Gemelin. 
-- pullastra, Wood. 
-virgineus, Linn. 
* To prevent confusion it may be observed that S. V, Wood of Messrs. Kendali 
and Bell’s paper is S. V. Wood, jiinr., not the author of the Crag Mollusca. 
