LAMELLIBRANCHIATA. 45 



The largest of tliese shells incasures: height 10.5"""., length 6.5"""., the second largest is 

 8 mm hioii. 



Specially characteristic of tliis species seems to me the large number of radiating ribs (fig. 8c|; 

 under the lens they are seen to extend right to the ears of the shell; Jeffreys has counted about 

 50 ribs, and on m\' specimens I have counted 60 — 70 ribs. 



According to Jeffreys L.subovata has been taken in the Norlliern .Atlantic off the entrance 

 to the Denmark Strait, 1450 fm.; between the Hebrides and F;eroes, 542 fm.; off the west coast of 

 Ireland, 420 — 1443 fm.; off the Azores, 1000 fm.; in the Western Mediterranean, 1456 fm. ■) 



Lima ingolfiana n. sp. 



PI. II, figs. 9 a— d. 



Tlie shell oval, somewhat ol)lique, moderately convex, silvery-white. The valves tliin, with 

 ca. 30— 40 radiating ribs, the ridges of which are as a rule finely scaled or spined; the middlemost 

 ribs (or rib) are stronger than the others, thus giving rise to a median furrow (or two furrows); the 

 beaks prominent; the hinge-margin fairly short, slightly sloping, forming obtuse angles with the 

 lateral margins; cartilage-pit triangular; the internal surface glistening silvery-white. Height 5.25"""., 

 length 3.5 """. 



The "Ingolf has taken this small, elegant species at Iceland at: 



St. 98. W. of Iceland 138 fm. 5.9" C. i valve. 



- 90. - - — 568 - 4.4° - 30 valves. 



- 78. vS. W. of — 799 - 4.5° - I spec, and 20 valves. 



This species is well characterized by its somewhat oblique, more or less broadly oval contour, 

 the postero-dorsal margin forming a blunt angle not only with the hinge-margin but also with the 

 Ijostero-median margin; as also by the rather well-marked sculpture of its finely scaled or spined 

 radiating ribs (fig. gd). 



Lima jeffreysi Fischer. 

 PI. II, figs. loa — c. 

 Lima Jeffreysi P. Fischer, Ann. Mag. Nat. Hist. (5) VI. 1880, p. 315; Journ. Conch. XXX, 1882, 

 p. 52; Locard, Exped. Scient. Travailleur-Tali.sman, Moll. Test. II, 1898, p. 415, PI. XV, 

 figs. 20 — 23. 



The "Ingolf" has taken this species at: 



St. 18. Off entrance to Denmark Strait. ii35fm. 3.0'' C. i valve. 



- 90. S. W. of Iceland 568 - 4.4° - i — 



- 69. S. - - 589 - 3-9° - I - 



The largest of these shells (from St. 90) is 9.5 "'"'. high. 



i) On the other hand, unhke Jefreys, I am unable to refer to thi,s specie.s the specimens of "L. subovati^' taken by 

 the Norwegian and the Dutch Exped. iu the Norwegian and Barents Seas, as 1 believe, that they belong to my species 

 Lima hypcrborea (see the latter). 



