98 
three are relatively gen the second and third of about the same 
width, but wider than o the fourth is a slender lineation sunk 
in the sutural canal). The first and second ligatures are broken- 
up into blunt, straight, axial ridges, separated by about as wide 
indented interspaces. 
Aperture oval, peristome thin. Columella slightly arched, 
forming a blunt roundly-effuse angle at the front; thinly a 
sparingly exsert to form an umbilical chink ; there is a slender 
Length, 3; width, 1:4 mm. 
Of six examples two are in accord with the foregoing descrip- 
tion. A third and fourth, which are translucent horn-colored, 
have the first and second ligatures deed ma small granules; 
whilst the fifth and sixth, a without ornament, 
and the spiral furrows are  feebly S T barely traceable 
on the body-whor 
D’Entrecasteaux Channel, Tasmania (W. L. May). 
Genus Pseudorissoina, Tate and May. 
Type :—P. Tasmanica, Tenison-W oods (Stylifer). 
Apex sinistral, spire and aperture like Rissoina (e.g., R. nivea). 
“Ts it not rather an Eulim Our study of the species con- 
firms Ten.-Woods’ einen Am the apex is sinistral—indeed, 
whilst having the spire and aperture of a Rissoina, like R. nivea 
(the shell is, idet smooth), it has the heterostrophé loop-like 
nucleus of Zulimella. Such a combination of characters seem to 
be unprovided for in the families Pyramidellide or Rissoide, 
hence the new generic seems Gok Briefly, this new genus is a 
Pyramillid with a Rissoina aperture or a Rissoinid with a 
Pyramilloid nucleus. The Night value of the nuclear character 
in classification induces us to place it, in Pyramidellide, near 
Eulimella. 
ne admiranda, nom. mutand 
E Ten.-Woods, P.R.S. Tasm., 1877, p. 150; 
non Turbonilla b Pfund. A. Adams, 1 1861. 
T. festiva, Angas, P.Z.S., 1877, t. 5, f. 4; non Folin, 1867. 
Victoria, Tasmania, and ‘N.S. Wa les. 
Rissoia (Apicularia) demessa, spec. nov. 
Shell minute, strong, pale-brown. Spire-whorls four, convex, 
ornamented with narrow roun ded oblique ibtd (about fourteen on 
the penultimate) more prominent medially, and attenuated at 
the sutures; also with spiral grooves, which are about as wide as 
the intervening flat threads (about eight on the penultimate) ; on 
