66 



I.AM KLLIBRANCHIATA. 



Locality 



West Greenland (Nanortalik) 



East Greenland (Cape Dalton) 



(Turner Sound). 



Length of 

 shell 



f 46-5 """• 



I 32-5 " 



40 - 



35-5 " 



35-5 - 



34-5 - 



(44-5 - 



Iceland (Reydarfjordr) 67 



'43-5 

 The Faeroes (Kongshavn 



4i-5 - 

 39-5 - 



I 5i-5 



(49 

 (Hveen) 42 



(4i 

 ' I 37 



Denmark (Hellebsek) 



(Kattegat) 



Height of 

 shell 



25 mra . 

 18 - 



22 - 



19-5- 

 20 - 

 18.5- 



21-5" 

 *7 - 



33-5 - 

 22.5- 



23 - 

 2i-5- 



29 - 

 26 - 



23 - 



2i-5- 



21.5- 



Height 

 Length 



53-3% 

 554 - 

 55 - 

 54-9 - 

 56-3 - 

 53- 6 - 

 48.3 - 

 54-8 - 

 50 - 

 5i-7 - 

 55-4 - 

 54-4 - 

 5 6 -3 - 

 53- 1 - 

 54-8 - 



524 - 

 58.1 - 



Breadth 

 Length 



33-8 - 



35 - 

 40.8 - 



35-2 - 



35-5 - 



36 - 



33-9 - 

 30.6 - 



32.2 - 



31.6 - 



3 1 - 1 - 



29.6 - 



34-5 - 

 34-i - 

 304 - 



Modiolaria faba (Miiller) Fabricius 1 )- 

 PI. Ill, figs. 8a— c. 

 Mytilus faba Miiller, Prodr. Zool. Dan., 1776, p. 250; Fabricius, Fauna groenlandica, 1780, p. 419. — 

 Modiola arctica Leach, in Ross, A voyage of discovery, 1819, App. II, p. 62. — Modiolafaba 

 Moller, Index Moll. Groenlandire, 1842, p. 19. — Modiola /abas Beck, Amtl. Ber. 24. Ver- 

 samrfil. deutsch. Naturf. u. Aerzte in Kiel, 1847, P- IX 5- — Crenella decussata Walker (non 

 Montagu), Journ. Roy. Dublin Soc. Ill, i860, p. 72. — Modiolaria faba Beck, in Gaimard, 

 Voyage de la Recherche, PI. 17, figs. 4a — i; Packard, Mem. Boston Soc. Nat. Hist. I, 1867, 

 p. 280; Morch, in Rink, Dan. Greenland, 1877, p. 442 s ) ; Dall, Bull. U.S. Nat. Mus., XV, 

 1879, p. 146. - Crenella faba Jeffreys, Sc. Proc. Dublin Soc, N.S., II, 1880, p. 128; Bush, 

 Proc. U. St. Nat. Mus. 1883, 13.244, PI. 9, fig. 3; Dall, ibid., 1S86, p. 207; Pfeffer, Jahrb. 

 Hamb. wiss. Anst, 3. Jahrg., 18S6, p. 44. — Modiolaria faba Posselt, Medd. om Gronland, 

 XXIII, 1898, p. 22. — Crenella faba Grieg, Rep. Sec. Norw. Arct. Exped. in the "Fram", 

 No. 20, 1909, p. 10, PI. I, fig. 1. 



The shell more or less veutricose, somewhat trapezoidal with a faint tendency to be oval, 



truncate in front, anterior margin rather curved, obliquely rounded posteriorly, ventral margin faintly 



this little known species I give here a synonymy-list, which is complete, so far as I know; by far the most of 

 references, however, are to nomina inula only. I think it doubtful whether M. faba is a Modiolaria, but it seems to me to 



stand further from the genus Crenella, and I retain the species under .Modiolaria, therefore, to avoid founding a new genus on 

 a single, northern species. 



2 ) Morch has forgotten to include the species in his earlier lists on the Mollusca of Greenland. 



