46 



LAMEIXIBRANCHIATA. 



In addition L.jeffreysi has been taken by the "Thor" at the following places south of Iceland: 



63 "05' N. L., 20°7' W. L 293 fm. 7 valves (mostly fragments). 



6 2 57' I 9°58' — 5°° " ca - 80 valves (many fragments). 



The largest of these shells is 12 n,m . high. 



This species is easily recognizable by its oblique shape, its squamular radiating ribs (fig. 10c) 

 and its lack of a central furrow. The number of ribs is 20 — 25, and even in the middle of the shell 

 their breadth is less than that of the intervening furrows. 



/.. Jeffreysi was only known earlier from the Bay of Biscay, 580 fm. ("Travailleur"). 



This species is nearly related to L. confusa E. A. Smith 1 ) from the Azores, Sombrero Island 

 and Pernambuco, 450 — 1000 fm.; this again is said to be identical with L.ovata Jeffreys (non Searles 

 Wood 2 ) from the North Atlantic, 1450 fm. L. setifera DalL) from Havauua, Barbadoes and North 

 Carolina, 52 — 450^11., is also a nearly related species. 



Lima sarsii Loven. 

 PI. II, figs. 11 a— d. 



?Lima crassa Forbes, Rep. Brit. Assoc. Adv. Science, 1843, p. 193. — Limfeja Sarsii Loven, Index 

 Moll. Scand., 1846, p. 32; Jeffreys, Brit. Conchol. II, 1863, p. 78, PI. 25, fig. 1. — Limatula 

 crassa Sars, Moll. Reg. Arct. Norv. 1878, p. 26. 



At Iceland this species has been taken by the "Ingolf" at: 



St. 98. W. of Iceland 138 fm. 5.9 C. 1 valve. 



- 85. >S. W. of Iceland 170 - 1 — 



The largest of these shells (St. 98) is 4 " ,m . 



Further, L. sars// has been taken at the Faeroes at: 



61 15' N. L., 9 35' W. L ca. 475 fm. 1 valve (height 4""".) 



6i° 35' - - 4° 39' - - 210 - 2 valves (max. height 3 '""'.) 



This species, which is readily recognizable from its solid, densely and coarsely scaled shell (fig. 11 d) 

 and crenulated cardinal margin (fig. 11 c), was not known earlier from these regions of the Atlantic. 



Its distribution extends from northernmost Norway (Varanger Fjord) along Europe and 

 into the Mediterranean to the Aegean Sea-t). It is not known in the Skager Rak or the seas within this. 



G.O.Sars estimates the vertical distribution to be from 50 — 300 fm., Jeffreys from 80— 300 fm. 

 Nevertheless the latter records it from great depths (off Ireland and on the line from Falmouth- 

 Gibraltar, 400, 500 and 600 fm., in the Mediterranean even 1456 fm.), and Loeard records it from 

 2018 meters off Cape Fiuisterre. 



■) Challenger Report, vol. XIII, 1885, Lamellibranchiata, p. 292, PI. XXIV, fig. 6. 



2) Ann. Mag. Nat. Hist. (4) vol. XVIII. 1S76, p. 426. 



3) Bull. Mus. Comp. Zool., XII, 1SS6, p. 225; Proc. U. S. Nat. Museum, XII, 1S89, p. 250, PI. XIV, fig. 10. 

 ij According to Loeard it is said to have been found at St. Helena. 



