A Review op the Land Moelusca of West’brn Australia. 
51 
Westraltracliia orthocheila Ancey 1898. 
Plate TIT., fig'. 8. 
1898 — Tracliia orthocheila Anccy, Pi'oe. Linn. Soe. N.S.W.^ Yol. XXII., p. 
774, ]il. XXXVT., fig'. 4, June 4. Oseai' Range, 100 miles inland 
from Derby, North-West Australia (W. W. Froggatt). 
Shell a litlle larger than the preeeding, .subdiseoidal, spire scarcely 
elevated, whorls .scarcely rounded, sutures impressed, umliilicus narrow, deep, 
columellar i-dleclion small, outer lip thin a, little rellected, mouth open with 
no basal subnodulation nor flattening. Coloration whitish marlfled above, 
with a brown band below the iieriphery, the rest of the base white, shell 
shining. Apex smooth, and only tine growth lines seen on the adult whorls. 
Breadth 13-14 mm., height 61/4-7 mm. 
The Oscar Range is twenty miles distant from the south end of the 
Napier (or Barrier Range), and its shell fauna appears to be different 
although this species is very close to derhyi. 
Westraltracliia alterna sp. nov. 
Plate III., fig. 17. 
Shell large for this genus, subdiseoidal, s)ure a little elevated, whorls 
slightly rounded, sutures imiiressed, last whorl descending a little, .subkceled, 
mouth flattened hoilzontally. The apical whorls, two in number, arc smooth, 
the adult four and a half sculplured only with regular striae, which become 
more distant on the last whorl. Outer lip I'diocted, base of lip flattened 
and almost nodulo.se, columella broad, angularly joining the base of the lip, 
reflected. Umbilicus narrow, ojien, half hidden by the reflection of the 
columella. Coloration horny, banded with dull browui above and below the 
periphery, base almost white. Breadth 17 mm., height 9 mm. Collected on 
the Barrier Range (i.e., Napier) by W. W. Froggatt. 
Westraltrachia increta sp. nov. 
Plate III., fig. 16. 
Shell large, not as largo as preceding, conical, spire elevated, whorls 
rounded, last subkeeled a little descending at the aperture, the mouth flat- 
tened horizontally. Colour pale brownish whit(> banded above and below the 
periphery with broad browm bands, the base dirty wdiite. The two apical 
whorls are smooth, the adult four and a half have only subobsolete striae 
vanishing on the base. The umbilicus narrow, almost concealed by reflected 
columella, which is broad and almost angularly meets the ba.se which is flat- 
tened and almost subnodulose. Breadth 1.5.5 mm., height 9.5 mm. Collected 
by W. W. Froggatt on the Barrier Napier) Range. 
Genus QUISTRACHIA geii. Dov. 
Type Trachia monogramma Ancey. 
Shell thin, subdiseoidal, s]ure a little elevated, wdiorls rounded, umbilicus 
narrow', persiiective, outer liji thin, a little reflected, subcircular open mouth, 
columella rather broadly reflected. 
Although hitherto classed with the preceding this shell is unlike any 
of the Westraltrachia in texture and form, and is nothing like Rhagada. 
