234 Dr. Gwyn Jeffreys on Arctic 



Scandinavia, and N.E. America, surface to 440ft. : Macclesfield; 

 500-600 ft., and Moel Trjfaen, 1330-1360 ft. (Darbishire) : 

 Port Kennedy, Greenland, 100-500 ft. (Walker). 



Synonyms very numerous. A specimen dredged in Dis- 

 covery Bay by Capt. Feilden corresponds with the variety 

 elliptica oi A. sulcata. 



Astarte fabula^ Reeve. 



Astarte fabula, Reeve, in Belcher's Last of tlie Arctic Voyages, vol. ii. 

 p. 398, pi. xxxiii. f. 5, a, b (from type !). 



St. No. 3 (Feilden). 



Recent. Wellington Channel (Belcher) : E. Greenland 

 (Mobius) : Spitzbergen (Torell, Eaton) : Arctic Exp., 5^- 

 15fms. (Feilden). 



I am now satisfied that A. Warhami of Hancock is not this 

 species, but the same as Crassina depressa of Brovv^n = ^. cre- 

 bricostata, Forbes, = .4. Richardsoni, Reeve. 



Necera suhtorta, G. O. Sars. 



Necera suhtorta, G. 0. Sars, MS., JefFr. in Ann. Nat. Hist. Dec. 1870, 

 p. 496. 



St. No. 3 (Feilden). 



Recent. Vadso (G. 0. Sars) : Bergen (Koren) : Hammer- 

 fest (M' Andrew) : Spitzbergen (Torell) : ' Lightning ' Exp., 

 550 fms. : ' Porcupine ' Exp., 1869, 62-125 fms. : ' Vorin- 

 gen ' Exp., 400 fms. (Friele) ! 



This pretty little shell differs from N. ohesa of Loven in 

 being not only much smaller, but more gibbous or • swollen, 

 and in having a shorter and upturned rostrum^ which appears 

 twisted when viewed edgewise. N. exigua is more slender 

 and delicate, besides being peculiarly sculptured. N. pellucida 

 of Stimpson is distinct from any of the above. 



Saxicava rugosa^ Linne. 

 Mytilus ruffosus, Linn. Syst. Nat. ed. xii. p. 1156. 



St. No. 4 (Egerton) ; NoS. 6, 7, and 10 (Hart) ; No. 12 

 (Feilden). 



Recent. Probably in every sea throughout the world, from 

 the upper part of the laminarian zone to the line of soundings :• 

 ' Bulldog ' Exp., 1622 fms. (fragment) : ^ Lightning ' Exp., 

 170-550 fms.: 'Porcupine' Exp., 1869, 90-1230 fms.; 

 1870, Bay of Biscay, 20-717 fms. ; Mediterr., 25-92 fms. : 

 ' Valorous ' Exp., 3-60 fms. : Arctic Exp., 5^-30 fms. 

 (Feilden). 



