SHELLS FROM KOREA STRAIT. 



419 



Malta and the Adriatic ; Jamaica ; North-east America ; Japan ; 

 Australia; New Zealand : low-water mark to 1180 fathoms. 



Fossil. Pliocene and Post-tertiary : Coralline Crag ; Scotland ; 

 Scandinavia ; Belgium ; South Italy ; Azores. 



Very variable in shape and sculpture. Many synonyms ; I have 

 noted seventeen. 



CONCHIFEEA. 

 Ajs'OMia ephtppium, Linne, 



A. ephippium, L. S. N. ed. xii. p. 1150 : B. C. ii. p. 30, pi. i. f. 4 ; v. 

 p. 165, pi. XX. f. 1, a-e. 



Hah. Korea, 51i fathoms ; young. North Atlantic, from Ice- 

 land and Faroe Isles to Egypt ; Black Sea ; Madeira ; N.E. Ame- 

 rica. Depth 0-1450 fathoms. 



Fossil. Pliocene and Post-tertiary : Coralline Crag ; Great 

 Britain and Ireland ; Scandinavia ; Italy. 



This polymorphous species has caused the manufacture of 

 between thirty and forty synonyms. 



Pecten similis, Laskey. ^ 



P. similis, Lask. Mem. Wern. Soc. i. p. 387, pi. viii. f . 8 : B. C. ii. 

 p. 71 ; V. p. 168, pi. xxiii. f. 5. 



Sab. Korea, 30-54 fathoms. Finmark to the Q-ulf of Egina ; 

 Madeira ; Jamaica : 2-722 fathoms. 



Fossil. Pliocene and Post-tertiary : Coralline Crag ; N.W. 

 Germany; Italy. 



The Korean specimens are smaller than those of European seas, 

 although otherwise undistinguishable. They are rather nume- 

 rous, and consist of single or separate valves. A few of them 

 (upper valves) are coloured and mottled or streaked exactly like 

 European specimens ; but they are generally white or colourless. 

 A valve from Rasel Amoush, on the Tunisian coast, has the in- 

 side marked with radiating lines which resemble striae; and I 

 mistook it for a species of Amussium or Fleuronectia, See Rep. 

 Brit. Assoc. 1873, p. 112. 



This abundant species has several obsolete synonyms. 



Crenella decussata, Montagu. 



Mytilus decussatus, Mont. Test. Brit. Suppl. p. 69. 



Crenella decussata, B. C. ii. p. 133, pi. iii. f . 4 ; v. p. 172, pi. xxviii. f. 6. 



Hah. Korea, 35-51 fathoms. Spitzbergen ; Greenland ; Ice- 

 land ; Scandinavia ; North of England and Ireland, And Scotland ; 

 North Atlantic (' Valorous ' Expedition, a fragment from 1750 



31* 



