486 Transactions. 
Anabathron, | 
not strongly keeled, and the peristome is duplicated in the same manner 
as in L. suteri (Hedley). Target Gully specimens are smaller, slightly : 
Lironoba charassa n. sp. (Fig. 7.) 
extend over rest of base.  Interstices between ribs about twice their width, 
but narrower on base ; they are crossed by regular fine growth-lines. Spire 
well impressed, margined above, and, later, below. Aperture very little 
oblique, more pyriform than polygonal, peristome continuous, much 
thickened by a strong external varix, internally duplicated by a small 
raised rim. olumella arcuate, inner lip raised and thickened, distinctly 
marked off from body-sculpture by a narrow groove, the encircling basal 
ridge very faint. 
Height, 2-5 mm. ; diameter, 1-2 mm. ; height of aperture, 1 mm. 
Holotype (unique), from maru, in the author's collection. 
Very close to preceding species; probably an evolutionary product. 
From its ancestor it is distinguished by its fewer but thicker ribs, while 
the Recent L. suteri (Hedley) has still fewer. In its aperture, basal 
sculpture, and apex L. charassa is much nearer the Miocene species. ; 
In addition to these last two species, the Australian L. wilsonensts 
G. & G. and a few other forms have spirally-lirate apices; but these shells 
correspond so closely to other forms with smooth embryos that, though the 
difference may eventually prove radical, it would seem unwise on present 
knowledge to make any separation. 
Estea polysulcata n. sp. (Fig. 8.) 
Shell of moderate size, pupiform, imperforate, solid, with several spiral 
sulci. Protoconch dome-shaped, of about 2 slightly convex whorls. Shell- 
whorls about 44, almost flat, base regularly rounded. Early whorls. E. 
apparently quite smooth, indications of spiral ribs seen on third whorl, _ 
and on following whorls low and flat spiral sulci well developed. Оп 
