28 



LAMELLIBRANCHIATA. 



1899, p. 66, PI. 18, figs. 6 — 13. — Pccten ahyssorum (Loven M. vS.) G. O. vSars, Moll. Reg. 

 ArcL Norv., 1878, p. 22, PI. 2, fig. 6. — C/ilaiiiys CV/ff/^v/ Dautzenberg & Fischer, Mem. 

 Soc. Zool. France X, 1897, p. 190, PI. 5, figs. 5—8. 

 Pectcn vitrcus Posselt, Medd. 0111 Gronland, XXIII, 1898, p. 11. 



St. 28 



- 25, 



- 98. 



- 90. 



- 10. 



- 9' 



- 8. 



- 80. 



- 78 



- 73 



- 69. 



- 68. 



- 39 



- 67 



- 40. 



- !■ 



This species has been taken b}- the "Ingolf Expedition at: 



Davis Strait 420 fm. 



- 582 - 



W. of Iceland 138 - 



568 - 



- 788 - 



- 295 - 



S. W. of Iceland 136 - 



- 935 - 



- 799 - 



— 486 - 



S. of Iceland 589 - 



- 843 - 



865 - 



— 975 - 



- 845 - 



— 600 - 



46. W. of the Faeroes 720 - 



breadth 



8"'"'.; the second largest (from St. 40): length 19"""., height 19.5"""., breadth 7"'"'. 

 Further, P.vitrcus has been taken by the "Thor" at the following places: 



Iceland. 



63=05' N.L., 20°7'W.L 293 fra. i .spec, and 5 valves. 



63°i2.5' — 20°o6' — 268 - 7 _ - I valve. 



^2°57' — i9°58' — 500 - I _ - 40 valves. 



62°io.5' - 19^36' — ca. 1000 - 3 _ 



63^21' — i6°22' — 263—295 - 3 — 



Faeroes. 



6i°8' N.L., 9°46'W.Iv 450 fm. i spec, (on .spine of Cidaris). 



6i°i5' — 9°35' — ca.475 - 6 — and 17 valves. 



Remarks. Examination of the nnmerous specimens at hand has led me to the same view as 



that held by Jeffreys, Norman, Verrill, Friele and Grieg, namely that P.abyssorum (I^oven) 



