8. Green marl, carbonaceous clay, and lignite, ferruginous clay, marl with 

 leaves and seed-vessels and green clay. Freshwater shells. 



9. White siliceous sand, without «hells.* 



Retracing our steps " we follow in imagination the gradual silting up 

 of a former estuary, and its gradation eastward into a pure river deposit. 

 The gradual disappearance of marine species, such as are found at Long 

 Mead End, and their replacement as we proceed by such as are of fresh- 

 water origin, is just such a succession as we should expect to meet in 

 tracing the course of a river upwards from its mouth." 



NUMBER OF SPECIES. 



Acteon 2 



Amphidesma 1 



Ampullaria 5 



Ancillaria 1 



Anomia 1 



Area 8 



Avicula 1 



Balanus 1 



Buccinum 1 



Bulla 6 



Cancellaria ..* 2 



Cardium 4 



Cassldaria 1 



Cerithium 3 



Chama 1 



Clavagella 1 



Conus 3 



Corbula 6 



Crassatella 2 



Cultellus 1 



Cypricardia 1 



Cyrena 1 



Cytherea 7 



Dentalium 3 



Ditrupa 2 



Fasciolaria 1 



Fistulana 1 



Fusus 14 



Gastrochcena 1 



Hipponyx 1 



Infundibulum 2 



Limopsis ... 1 



Littorina 1 



Lucina 5 



Melania 1 



Melanopsis 1 



Mitra 3 



Modiola 4 



Murex , 7 



Natica 7 



Neoera 2 



Nerita 1 



Nucula 5 



Nummulites 2 



Oliva 4 



Ostrea 4 



Panopoea 



Pecten 3 



Petricola ..., 1 



Pectunculus 2 



Pholas 1 



Pinna 1 



Pleurotoma 15 



Psammobia 2 



Pyrula 2 



Ringicula 1 



Rostellaria 2 



Scalaria. », 4 



Saxicava 1 



Seraphs 1 



Serpula 5 



Sigaretus 1 



Solarium 3 



Solenocurtus 1 



Solen 1 



Strombus 1 



Tellina 10 



Terebellum 1 



Teredo 2 



Triton 1 



Trochus 3 



Turritella 2 



Typhis ... 2 



Venericardia 2 



Voluta 12 



Volvaria 1 



Vulsella 1 



The greatest rarity of Barton is the wing shell, (Rostellaria macrop' 

 tera.) Dealers consequently charge a high price for it, but with this 

 exception, and perhaps a few others which are not so expensive, a good 

 collection may be obtained at a moderate sum. The best season for 

 searching the cliff is in the spring. The upper beds where they rise from 

 beneath the beach near Beacon Bunny are the most productive ; the 

 Chama squamosa, for instance, is very abundant. Beneath Barton are 

 found the larger shells, and teeth are to be met with nearer to Chooton 

 Bunny, and abundantly near Beacon Lodge. 



A short distance to the west of Rothsea Castle the clay disappears ; its 

 line of boundary runs from thence in a straight line, forming a low hill 

 by Hubbome, and Bistem to Poulner (a mile and a half east of the town 

 of Ringwood), and a few miles beyond meets the line of plastic clay 



• For a description of the Crocodile, and the four species of Tortoises discovered 

 here by the Marchioness of Hastings, I refer my readers to the Fossil Reptilia of the 

 London Clay, by Professors Owen and Bell, published by the Palceontographical Society. 



