NORMAN : ON THE MOLLUSCA OF BERGEN FIORDS, 39 



valves dredged by Mr. Jeffreys and myself in St. Magnus' 

 Bay, Shetland {vide Brit. Assoc. Report, 1867, p. 432) that 

 I concluded if the latter were fossil the former must also be 

 regarded as such, A few days later, however, Leda permila 

 was found living in great profusion at Station 24. I venture 

 to predict that the day will come when the species will be 

 found similarly living in the Shetland Sea. 



38. Yoldia arctica, (Gray), 



Nucida arctica, Gray, " Supplement to the Appendix to 

 Parry's First Voyage," 1819-20, p. 241 (1824) (not N. arctica 

 of Moller, Morch, Sars earher papers, nor of Broderip and 

 Sowerby, j^i/i? Torell). 



Nucula truncata, Brown. lUust. Conch. Gt. Brit., ed. i. 

 (1827), pi, XXV., fig. 19, ed. ii. (1844), p. 84, pi. xxxiii., fig. 19. 



Area glacialis, W. Wood, and of Hisinger ; Nuculana 

 glacialis, Morch ; Yoldia glacialis, Gray : (but not Area glaci- 

 alis, Gray, " Suppl. Parry's Voyage," which is a large Arctic 

 form of Area ohliqiia, Philippi, over which name it has pre- 

 cedence). 



Nucula Portlandica^ Reeve, Account of shells collected 

 in Belcher's Arctic Voyage, 1855, p. 396, pi. xxxiii., fig. 3a-b. 

 (PjV; /'(?;-//a;z^zV«, Hitchcock). 



Nucula siliqua, Reeve, l.c., pi, xxxiii., fig, i. 



Yoldia Arctica, O. Torell. Spetsbergen Mollusca, 1859, 

 p. 25, 



Yoldia Arctica, M. Sars, Norge forekom, fossile Dyre- 

 levninger fra Quartaerperioden, 1865, p, 37, pi. ii., fig. 59-66, 

 pi. iii., fig. 67 — 74 (figurge bonge), 



Yoldia glacialis, Reeve, Conchol. Iconica, "Yoldia," 

 187 1, pi, iii., fig. i2a-b. 



Leda arctica, Jeffreys, Ann, Nat, Hist,, ser. iv,, vol, xx. 

 (1877)5 P- 238. 



