44 



LAMELLIBRANCHIATA. 



Lima similis n. sp. 



PI. II, figs. 7 a — c. 



The shell oblong, nearly equilateral, tumid, silvery white. The valves thin, with ca. 34 — 38 

 radiating ribs, two of the middle ones stronger than the others, with an interstitial furrow, or only 

 one prominent median rib; the concentric lines conspicuous and close set. The beaks fairly prominent, 

 the hinge-margin almost straight, forming with the lateral margins an obtuse angle. The inside 

 glistening silvery white. Height 7 """., length 3.75 ™". 



The "Ingolf has not taken this species, but the "Thor" found it S. of the Faeroes, namely at 



6i°7' N. L,., 9^30' W. L 440 fm. 5 valves. 



6i°i5' — 9-35' — ca. 475 - 10 — 



Further, the "Thor" has dredged the same species in the Bay of Biscay at 



43°37' N.L., 2°o8' W. L 250— 790 fm. 8 spec, and 15 valves. 



This species has a great resemblance to Liwa subauriculata, iKit the umbones are less swollen, 



the radiating (fig. 7 c) ribs finer and more numerous and 

 the dorsal margin forms more distinct angles with the 

 lateral margins than in the latter (comp. figs, i and 2). 

 Fig. I. LimasumUs. Vi^. 2. Linm subauncuiata. I imagine, that the rccords given by authors oiL.suban- 

 ^ ^' -^ ^' riciilata from very great depths are due to mistakes in 



determination, L. similis being concealed under the name of L. sicbauficitlata. 



Lima subovata Jeffreys. 

 PI. II, fig. 8a— c. 

 Lima siibovafa Jeffreys, Ann. Mag. Nat. Hist. (4) XVIII, 1876, p. 427; Proc. Zool. Soc, 1879, p. 563, 

 PI. 45, fig. 2; Smith, Challenger Report XIII, 18S5, P- 292. 



St. 24. 



- 36. 



- 3& 



- 22, 



- 90. 



- 10. 



- 80. 



- 81 



- 69. 



This species has been taken by the "Ingolf at: 



Davis Strait 1199 fm. 2.4° C. 



— — 1435 - 1-5° - 



S. of Greenland 1870 - 1.3° - 



- - - 1845 - 1-4° - 



Denmark Strait 568 - 4.4° - 



- 788 - 3-5° - 



S. W. of Iceland 935 - 4 ° - 



- - - - 485 - 6.1= - 



S. of Iceland 589 - 3.9° - 



I spec. 



I spec, and fragments of 10 valves. 



3 spec, and 2 valves. 



I spec. 

 15 valves. 

 10 — (mostly fragments). 



2 



I spec, and i valve, 

 ca. 30 valves (mostly fragments). 



Further, the "Thor" has taken L. subovata to the south of Iceland at the following places: 



63°05' N. L., 20°7' W. L 293 fm. i valve. 



62°57' — i9°58' — 500 - 3 spec, and ca. 80 valves (many in fragments). 



