450 



TABLE OF DISTRIBUTION. 



Species. 



s 

 - 



O 



Conchifera {continued). 



Cardium exiguum 



fasciatuin 



nodosum 

 edule . . . 



minimum . . . 



Norvegicum . 



Isocardia cor 



Cyprina Islandica. 

 Astarte sulcata . . . 



compressa . 



triangularis 

 Circe minima . 

 Venus exoleta . 



lincta 



Chione . . . 



fasciata . . . 



Casina . . . 



verrucosa . . . 



ovata 



G-allina 



Tapes aureus 



virgineus . . . 



pullastra . . . 



decussatus . . . 

 Lucinopsis undata 

 Gastrana fragilis . 

 Tellina balaustina 



crassa . . 

 balthica 



tenuis 



fabula 



squalida 



donacina 



pusilla 



Psammobia tellinella 

 costulata 



Ferroensis 

 vespertina 

 Donax vittatus 

 trunculus 

 politus . . 



c 



u 

 <o 



S 



o 

 m 





Extra-European localities. 



Algeria. 



North Africa, Canaries, and 

 Azores. 



Aral Sea and Caspian. 



Madeira and Canaries. 



North America. 



North America, North Africa, 



and Canaries. 

 North America. 

 Canaries. 

 Madeira and Canaries. 



North Africa. 



North Africa and Azores. 



Algeria, Madeira, and Cana- 

 ries. 

 Canaries. 



North Africa. 



Senegal and Indian Ocean ? 



Mogador. 



North Africa. 



North Africa, Madeira, and 



Canaries. 

 Gulf of Tunis. 

 Behring's Straits, Kamts- 



chatka, and North America. 

 Mogador. 

 Algeria. 



Madeira, Canaries, and Azores. 

 Madeh'a. 



North Africa, Madeh'a, and 



Canaries. 

 North Africa and Canaries. 

 North Africa and Canaries. 



North Africa. 

 Algiers. 



