Europe and Eastern North America. 



239 



87 

 89 

 90 

 92 

 93 

 95 

 9(3 

 97 

 98 

 99 

 lUO 



101 

 103 

 104 



105 



10(5 

 107 

 107 

 108 

 109 

 110 



110 

 112 



113 

 113 



115 

 116 



117 



119 



121 

 123 

 124 

 125 

 126 



Name of Species. 



Synonyms and Eemarks. 



Kellia planulata, Si 



suboi-bicularis, Montagu 



Turtonia minuta, Fabricius... 



Montacuta elevata, St 



Saxicava rugosa, Pennant , 



arctica, L 



Petricola pholadiformis, Lam. 



dactylus, Sai/ 



Macomafusca, ^«y (1826) ... 



proxima, Gray (1839).., 



Tellina tenia, Sai/ 



tenera, Say 



Lucina filosa, St. (1861) 



dentata, Wood 



Cryptodon Gouldii, Philippi 

 (1845) 



Sphffirium simile, Say (1816), 



partumeium, Say (1822) 



rhomboideum, Say .... 



Vermontanum, Prime 



(1861) 



truncatum, Linsley 



tenue, Prime 



■ securis, Prime 



occidentale. Prime 



Pisidium dubium, Say (1816) 

 Adamsii, Prime (1851) 



compressmn, Prime. 

 a'quilaterale, Prime . 



ferrugineum. Prime. 



abditum, Haldemaii 



(1B41)..... 



variabile. Prime .... 



— - Tentricosum, Priine . 



Astarte castanea, Say 

 sulcata, Da Costa . 



semisulcata, ifac^(1817) 



quadrans, Gould 



elliptica, Hanley 



Banksii, Leach (1817 



crebricostata, Forbes 



(1847) 



G. Lascsa. 



G. Cyamium. 



Linne instead of Pennant. 

 S. rugosa, var. 



Valentia, Ireland ; a fragment, 

 P. pholadiformis, var. 

 Tellina Balthica, L. (1766). 

 T. calcaria, C'b. (1782j. 



Allied to T. tenuis. 

 L. borealis, L. (1766). 



Axinus flexuosus, Mont., var 



(1803). 

 S. striatinum. Lam. (1818). 

 S. lacustre, Miiller (1774). 

 Allied to S. corneum, wliicb is 



European. 



8. pisidioides, Gray (1856). 



Perhaps introduced into 



England. 

 S. lacustre, var. 



S. lacustre, var. BykhoUii. 



P. avinicum, Miill. (1774). 

 P. fontinale, Draparnaud 

 (1805). 



Allied to P. nitidum, vcbicb is 



European. 

 P. pusillum, var. obtusalis. 



P. pusillum, Gmelin (1788). 



Possibly some of these North- 

 American species may be re- 

 duced in number. 



PerhajDs a variety of A. borea- 

 lis, C\\. 



Including A. tmdata, Gould = 

 A. Oinalii, J. Sow. 



A. borealis, Ch. (1784), var. 



A. castanea, var. nana. 



A. sidcata, var. 



A.compressa, Mont.(1803),Tar. 



A. depressa, Br. (1827). 



