444 Dr. T. Wright on the Freshwater and Marine 



Corbula exarata. Desk. 

 Crassatella plicata. Sow. 

 Clavagella coronata, Sow. 

 Cytherea transversa. Sow. 



obliqua, Desk. 



• rotundata, Brand. 



, new species. 



Hemicardium Bartoniense, Wright 



MSS. 

 Modiola tenuistria. Mill. 

 Lucina mitis. Sow. 

 Mactra depressa (var.), Desk. 

 Nucula similis. Sow. 

 minima. Sow. 



Nucula trigona. Sow. 

 Ostrea flabellula, Lam. 

 Panopaea rugosa, Edwards. 

 Pecten carinatus. Sow. 

 Pectunculus costatus. Sow. 



Plumsteadiensis, Sow. 



Solen gracilis. Sow. 

 Tellina Hantoniensis, Edw. 



lamellulata, Edw. 



squamida, Edw. 



laevis, Edw. 



ambigua. Sow. 



scalaroides {van.), Lam. 



Venericardia, near imbricata ?, Desk. 



Gastekopoda. 



Actseon simulatus, Brand. 

 Ancillaria tunitella. Sow. 

 Buccinum junceum, Sow. 



canaliculatum. Sow. 



Bulla attenuata, Soiv. 

 Cerithium bexagonum, Lam. 

 Conus dormitor, Brand. 

 Cyprsea Bartoniensis, Wright MSS. 

 Fusus bulbiformis. Lam. 

 Mitra scabra, Sow. 



parva. Sow. 



Murex frondosus. Sow. 

 Natica ambulacrum. Sow. 



Pleurotoma prisca. Brand. 



colon, Sojf . 



Rostellaria rimosa. Brand. 

 Seraphs convolutus, Montf. 

 Strombus Bartoniensis, Sow. 

 Solarium canaliculatum, Sow. 

 Triton argutus, Brand. 

 Trochus monilifer. Lam. 

 Voluta costata. Sow. 



lima, Sow. 



Magorum, Sow. 



spinosa. Lam. 



undulata, Wright MSS. 



ZOOPHYTA. 



Turbinolia humilis, Milne-Edwards. 



firma, Milne-Edwards. 



Lunulites radiata, Lamarck. 



Turbinolia Bowerbankii, Milne-Ed- 

 wards. 

 Fredericiana, Milne-Edwards. 



No. 21. The Barton clay ; rises on the shore about half a mile 

 west of Beacon Bunny near Barton Gang, and runs out of the 

 cliff about a quarter of a mile westward of Chuton Bunny, nearly 

 half a mile to the eastward of High Cliff Castle. It attains a 

 thickness of about 40 or 50 feet. An accurate measurement of 

 this bed could not be obtained in consequence of the debris 

 which covers it. It contains the greater number of the fossils 

 known as " Barton shells," with teeth of Squalus, Lamna, and 

 Myliobatis. 



CONCHIFKBA. 



Area appendiculata. Lam. 

 Cardium porulosum. Brand. 

 Clavagella coronata, Desh, 

 Corbula globosa. Sow, 



pisum. Sow. 



revoluta. Sow. 



striata. Lam. 



Crassatella sulcata. Brand. 

 Cytherea elegans. Lam. 



suberycinoides, Desh. 



tellinaria, Lam. 



Ostrea oblonga. Brand. 

 Pinna margaritacea. Lam. 

 Venericardia globosa. Sow. 



