AUSTEN — TERTIARY DEPOSITS OF THE SUSSEX COAST. 53 



Tapes aurea, Gmelin. 



Along the West of the British Islands ; in the Channel as 



high as Little Hampton. 

 It occurs in some marine beds near Dublin. One specimen 

 only has been seen from the Crag. Mr. G. Sowerby remarks 

 that the fossil specimens from Sussex resemble the Mediter- 

 ranean variety. 

 Mactra stultorum, Linn. 



Common, with a great range. 

 In the Crag deposits. 

 Mactra suhtruncata. Da Costa. 



A common shell, with a great European range. 

 In Red Crag. 

 hutraria Listeri=-L. piperata^ Gm. 



Common in most estuaries and muddy bays. 

 Lutraria oblonga, Chem.=i. solenoides, Lara. 



Rare; British distribution, South and West. 

 Lutraria eUiptica /, Lam. 

 Lutraria ruyosa, Linn. 



End. Meth. pi. 254. fig. 2. Desh. Tr. Elem. vol. i. pt. 1. 

 p. 274. Living on the coasts of Algeria and Morocco 

 (Desh.) ; and of the Canaries, South of Spain, and Por- 

 tugal (M'Andrew). 

 Fossil in Italy : Desh., Sismonda ; but not noticed by Phi- 

 lippi ; in Sicily either recent or fossil. 

 Syndosynya Boysii. 



An Atlantic species ; rare ; ranging to coast of Spain. 

 In Mr. G. Sowerby's list of Selsea species. 

 Solen siliqua, Linn. 



Common on all muddy shores. 

 My a arenaria, Linn. 



In bays and estuaries, common ; range Northern. 

 Mya truncata, Linn. 



Common in muddy estuaries ; range Northern. 

 Fossil in Crag : Sicilian deposits. 

 Pholas crispata.^ Linn. 



According to Messrs. Forbes and Hanley ** on the southern 

 shores of England, it is reckoned among the less common 

 shells ;" it is more abundant to the North. — Brit. Moll. vol. 

 i. pp. 115, 116. It is a Scandinavian species; but is not 

 cited by Mr. M 'Andrew from the coast of Spain or Por- 

 tugal ; nor by Philippi as either recent or fossil. The largest 

 known examples exceed 3 in. in length, and are about If in. 

 in breadth ; the specimens alluded to are in a subfossil 

 state from some estuary sands near Dublin. It occurs in 

 the Crag, but the examples from that formation are much 

 less than as above. 

 Pholas dactylics, Linn. 



The foregoing list is a limited one, containing only 38 species ; it 

 includes some forms not noticed by Mr. Sowerby in Mr. Dixon's 



