2 g LAMELLIBRANCHIATA. 



1899, p. 66, PI. 18, figs. 6 — 13. Pecten abyssorum (Loven M. S.) G. O. Sars, Moll. Reg. 



Arct Norv., 1878, p. 22, PI. 2, fig - . 6. — Chlamys Cliaperi Dautzenberg & Fischer, Mem. 

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

 Pecten vitreus Posselt, Medd. 0111 Gronland, XXIII, 1898, p. n. 



This species has been taken by the "Ingolf" Expedition at: 



St. 28. Davis Strait 420 fin. 3.5° C. 3 spec. 



- 25. 582 - 2>-2,° - 3 — and 1 valve - 



- 98. W. of Iceland 138 - 5.9° - 1-4 valves. 



- 90. 568 - 4.4 - 3 valves. 



- 10. 788 - 3.5 - 7 spec, and 1 valve. 



- 9- 295 - 5.8 - 2 - - 1 



8. S. W. of Iceland 136 - 6 ° - 3 valves. 



- 80. 935 - 4 ° - 1 valve. 



- 78. 799 - 4.5 - 2 spec, and 32 valves. 



- 73- 486 - 5-5° - 2 



- 69. S. of Iceland 589 - 3.9° - 1 and 6 valves. 



- 68 - 843 - 3.4 - 3 



- 39- 865 - 2.9 - 7 - 



- 67. 975 . 3 ° - 6 — and 3 valves. 



" 4o. S45 - 3.3° - 16 - 



- 7- 600 - 4.5 - 1 — 



- 46. W. of the Faeroes 720 - 2.4 - 1 — 



The largest of these specimens (from St. 25) measures: length 25"""., height 25.5"""., breadth 

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



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



Iceland. 



f>3 < >5' N - L., 2o°7'\V.L 293 fm. 1 spec, and 5 valves. 



63°i2.5' — 2o°o6' -■ 268 - 7 — - 1 valve. 



<'- '^7' 19 "5 s ' - • 500 - 1 — - 40 valves. 



62°io.5' — i 9 °36' — ca. 1000 - 3 - 



i6°22' - 263—295 - 3 — 



Faeroes. 



6j 8' N.I,., 9°46'W.L 450 fm. 1 spec, (on spine of Cidaris). 



'" I 5' 9°35' ca.475 - 6 — and 17 valves. 



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

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



