a4 313 
Crasatella micra, Verco., Trans. Roy. Soc., S. Austr., 1895, 
vol. xix., p. 93, pl. 1, fig. 3. 
Previously dredged alive in 20 and 22 fathoms; one has 
since been taken alive in 16 fathoms, three miles off Tunk 
Head, and one perfect individual and 11 valves in 62 fathoms 
north-west of Cape Borda. Valves have been obtained off 
eae ey A in 49 fathqms, and 12 in 110. 
Geen probleema, n. sp. Pl. xxix., figs. 6, 7. 
Shell transversely-orbicularly oval, solid, projecting ante- 
riorly. Umbo prominent, incurved, prosogyre, acute. Post- 
dorsal side roundly sloping ; anterior dorsal side concave near 
the umbo, then nearly straight, continuing into a 
well-rounded front side; ventral border with a uniform 
open curve, merging into the slope of the posterior side, 
with an inconspicuous round angulation. The surface is cor- 
rugated with about twenty solid wide concentric ribs, more 
projecting at their upper border, wider than their interspaces. 
For about 2°5 mm. from the apex the surface is smooth. Inner 
border simple and smooth. Colour light horn-tint. 
Dim.—Antero-posterior diameter, 10:3 mm.; umbo-ven- 
tral, 9°4 mm. ; sectional of the two valves, 4°25. 
Locality.—Off Beachport, in 100 fathoms, 2 valves: 150 
fathoms, 14 valves. 
Diagnosis.—In shape it is very like C. micra, Verco; but 
this is a much smaller shell, with an equal number of con- 
centric ribs, and these extend quite up to the apex. It closely 
approaches C. discus, Hedley, in the smooth area near the 
umbo, and in the marked concentric ribbing, but has the front 
much more produced, and the postero-lateral area not flat or 
truncated at the border. 
Variations.—In some the angle at the umbo is more acute 
and in others less than in the type, so that the shell is pro- 
portionally narrower or wider. In some, especially the wider 
ones, there is a tendency to slight truncation in the posterior 
part of the ventral border. 
Z POLL gee 
Lima Iticostata, Sowerby. 
Lima multicostata, Sowerby, Thes. Conch., 1847, vol. 1, p. 85, 
ci (O) al, seth, 65) Bk. ype locality—“‘Mediterranean (?)’ 
Reeve’s Conch. Icon., 1872, vol. xviii., pl. 1, f. 4; E. A. Smith, 
Chall. Rep., Zool., vol. xiii., 1885, p. 288; Tate, Trans. Proc. Roy. 
Soc., S. Austr., 1886, vol. ix., p. 108; Tate and May, Proc. Linn. 
Soc., N.S. Wales, 1901, vol. xxvi., part 8, p. 440; Pritchard and 
Gavliff, Roy. Soc., Vict., 1904, vol. xvii., (N.S.), part 1, p. 259. 
Radula lima, Linné, Angas, Proc. Zool. Soc., Lond., 1865, p. 
656, No. 91; Ten; Woods, Proc. Roy. Soc., Tasm., 1878, p. 56. 
: Lima lima, Linn, var, multicostata, Sowerby, Hedley, Mem. 
Austr. Mus., vol. iv., 1902, p. 309. 
Freé4 
Frye 
