226 
rendered distinct by the slight vaulting of the erect lamelle at 
the intercrossing. Ten-Woods does not describe the periphery, 
and Tryon’s figure shows the periphery uninterruptedly convex ;. 
and as his example has a diameter of 1.5 mm. only, it is clear 
that the peripheral lineation is acquired at a more advanced 
stage of growth; Petterd’s type of Z. compacta, which measures 
14 mills, is similar. 
The type of L. compacta, which I figure, as also all other 
examples seen by me and considered conspecific, is ornamented 
with transverse striz between the ribs; on the other hand, Ten.- 
Woods says of his Z. annulata, the “interstices smooth.” In all 
other respects the two shells are identical, and to reconcile the 
discrepancy in their diagnoses, it may be assumed that “smooth” 
as applied by Ten.-Woods refers to the appearance as seen by the 
unaided eye. Petterd’s character, “ aperture expanded,” conveys 
a false impression ; Ten.-Woods’s observation is the correct one, 
‘aperture bearing a varix round the mouth like one of the rings 
of the spire,” and notes “‘the aperture has hardly that thickening 
which we observe generally in the genus,” 
Liotia Tasmaniea, TVen.- Woods. 
1865. Liotia siderea, Angas (list-name), P.Z.S., p. 178 (non 
Reeve). 
1876. Liotta Tasmanica, Ten.-Woods, Proc. Roy. Soc., Tasm.,. 
for 1875, p. 153. 
1895. Liotta Tasmanica, Hedley, P.L.S., N.S. Wales, vol. IX., 
p. 465, three woodcuts. 
The South Australian shell which has been so long known as 
L, siderea is not Reeve’s species, as I have satisfied myself by 
comparison with his type in the British Museum; they have 
much resemblance, but the Philippine shell has in particular a 
much more ample body-whorl. An immature shell of ZL. Tas- 
manica, all that I have seen, is identically that of the earlier 
whorls of the South Australian so-called siderea, whilst Hedley’s 
figures of the Tasmanian shell remove all doubt as to the identity 
of the two. JL. siderea, Reeve, is therefore expunged from the 
Australian fauna, as the only published occurrence of it is the 
faulty one by Angas. Tenison-Woods in his description com- 
pares his new species with JZ. discordea, but in this regard an 
error of determination has been committed, as the Tasmanian 
shell of that name is not Reeve’s species. The test and operculum 
of Z. Tasmanica have the characteristics of the genus. 
Liotia ealliglypta, Melvill. 
Reference.—Journ. Conch., VI., t. 2, f. 10, p. 410, 1891. 
The type was taken at Thursday Island, North Australia. 
