520 Transactions. 
The new species differs at sight from Z. lissa (Sut.) in its smaller size 
(Z. lissa (Sut.) of a little over 2 whorls is 0-9 mm. in diameter), deeply 
furrowed suture, absence of sculpture, and much wider umbilicus, which 
in Z. lissa (Sut.) is not more than one-fifth major diameter. 
Talopena sublaevis n. sp. (Fig. 3.) 
Shell small, depressed-turbinate, perforate, thin, slightly sculptured. 
Spire low, about one-half height of aperture, outlines slightly convex. 
Protoconch lost, whorls about 4, subangled at periphery, earlier ones - 
smooth, penultimate with traces of about 6 low flattish spiral ribs with 
linear interstices ; the same sculpture continued over body-whorl, about. ; 
7 spirals above periphery and the same number below, less distinct on flatly 
convex base and with wider interstices ; innermost one margins um 
and is obsoletely crenulated but otherwise not more prominent than the 
angled above and below, very little .naereous within. Columella slightly 
reflexed and oblique, produced at base on meeting carina of. umbilicus, 
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Xymene robustus n. sp. (Plate 52, figs. 4a, 4b.) 
3 
FEDER MES So ash Sa vrs АДИ 
2 
Shell small, fusiform, very solid, whitish, with axial and spiral ribs. 
There are strong, broadly rounded, slight] jals, 14—15 on реп" 
ultimate whorl, with аы but fe ichs diete dor юй 
