268 



James D. Dana. Esq., on the 



of marine fauna in depth as well as in latitudinal distribution, 

 will stand as true. But we believe that facts do not bear out 

 this conclusion ; deep-sea species live in deep seas in both 

 regions, with but little difference in the depth to which they 

 extend. They are boreal in character, when of Mediterranean 

 origin, because they are cold-water species ; and their wide 

 distribution is because of the wide range of temperature for 

 which they are fitted, rather than their fitness to endure a 

 given temperature which they find at considerable depths to 

 the south, and near the surface to the north. 



As this point is one of much importance, we have run over 

 the recent tables of dredging by Professor E. Forbes, in the 

 iEgean and about the British Islands,* to see how far it is 

 borne out ; and we add other results by R. Macandrew, 

 Esq., at Vigo Bay, Portugal, Gibraltar, Malta, Pantellaria, 

 Algiers, and Tunis. \ 





North of 



South of 









Malta and 

 Pantel- 

 laria. 







Scotland 

 and 



England 

 and Isle 



Vigo Bay. 



Gibraltar. 



iEgean. 



Algiers 

 and Tunis. 



Corbula nucleus . . 



Shetlands. 



of Man. 











3°80 



5°50 



5-25 



8°20 



7°-80 



6°50 



8-35 



Neoera cuspidata 



10-80 



•50 



•20 



•45} 



12-185 







Thracia phaseolina . 



•80 



3-30 







7-30 







Solen pellucidus . 



7-100 



5-50 





•40 







•35 



Psammobia ferroensis 



3-90 



5-50 





•8} 



20-40 





10- 



Tellina donacina . . 



1*80 



5'40 







7-45 





10- 



Mactra subtruncata . 



0-12 



•20? 



5-10 









6' 



Lutraria elliptica 



0-10 



•20 



Low water 











Cytherea cbione . . 





10-20? 





•8 



7-10 



6-15 





Venus ovata . . . 



5-100 



7-50 



•8 



6-40 



29-135 



6-40 



6*35 



Venus faseiata . . 



5-90 



7-50 



•8 



•8 



27-40 



6*50 



6-35 



Venus verrucosa . . 





•10 



•5 



•6 



2-40 



6-15 



6- 



Artemis lincta . . 



0-80 



5-50 



Low water 



•6 





6*15 



6-8 



Cardium echinatum 



5-100 



5-50 



Littoral 





7-50 







Lucina nYxuosa . . 



3-100 



5-50 



•4 





7-11 







Lucina spinifera . . 



10-100 



15-30? 



10-12 



15-25 



4-30 



6'40 



•35 



Kellia suborbicularis 



0.90 



10-40 



•8 





29-45 



35-50 





Modiola tulipa . . 



10-50 



5'25 



•12 



10-25 



2-50 





•35 



Modiola barbata . . 





2-15 







7-95 



6-15 



6-8 



Area tetragona . . 



10-60 



20-30 



*-8j 



•30 



20.80 



35-50 



•35 



Area lactea . . . 





10-50 





12-20 



0-150 





6-35 



Pectunculusglyeimeris 



5-80 



5-50 



8-12 



•30 



6-24 





•35 



Nueula nitida . . 



5-60 



5-30 



20-25 



12-40 





6-15 



6-8 



Nucula nucleus . . 



5-100 



5-50 



5-25 



6-20 



2-10 



6-40 



6-35 



Lima subauriculata . 



4-100 



15-30 





•35 



15-30 





•35 



Pecten similis . . 



2-80 



20-50 



•20} 





27-185 





•35 



Pecten maximus . 



2-40 



10-30 



•8 



4-25 





35-50 



6-8 



Pecten opercularis . 



2-100 



5-50 



8*20 



20-40 



10-70 





•35 



Pecten varius . . . 



3-20 



3-30 



•8 



•8 



7-55 



6-15 



•35 



Anomia epbippium . 



0-80 



•50 



•10 





2040 



35-50 



6-35 



* Rep. Brit. Assoc. 1843 ; and On British Marine Zoology, Ibid., 1850, p 192. 

 t Ibid., p. 264. } Not found living at the depth stated. 



