Toil IliEDALE. 
Quictracaia monogramma Ancey 1898, 
Plate III., fig. 20. 
1898 — Tracliia monogramma Aneoy, Proe. Linn. Soc. N.S.W., Vol. XXII., 
p. 775, pi. XXXVI., fig. 9, .June. Oscar Range, N.W.A. (W. W. 
Proggatt). 
In addifion to the characters mentioned above, the shell is horny brown 
with a darker brown on peripheral band. The apical whorls are .smooth as 
is the rest of the shell save for indistinct growth lines, the whole surface 
slightly shining (“oleoso,” Ancey wrote). The figured shell measures 17 
mm. in breadth by 10 mm. in height, while the type, a unicum, measured 
15.5 by 8.5 mm. 
[Helix australis Menke 1848. 
1848 — Helix (ReliceUii) australifi Menke, Moll. Xov. Holl. Spec., p. 6 (Apl. 
11), among limestone rocks at Mount Kliza near the Swan River. 
1858 — Helix australis Pfeiffer, Syst. Conch. Cab. (Martini & Chemnitz), 
ed. Kuster, Bd. I., Abtli 12, pt. 2, ]>. 276, pi. 123, figs. 7, 8 (after 
June, 1852). Specimen from Menke Collection figured. 
1852 — Helix australis Reeve, Couch. Icon., Vol. All., pi. 131, sp. 808, Oct. 
Swan River, New Holland. )Mus. Cuming. 
This species has caused a lot of trouble, yet it seems certain that it is 
merely a South African shell mixed with the IVestern Australian collection 
of Dr. L. Preiss. Why this has remained on the list, when this imssibility 
was known is curious. Reeve noted, “.X small striiH'd si)ecies of European 
aspect,” while, of the South African slull he wrote, “Closely allied to a well- 
knowni European form.” Menke himself compared it with a South African 
shell, and Benson recorded that •‘this South African representative could 
not be refound by Dr. Bacon.” Smith questioned the identity of Reeve'S 
specimen wnth Menke’s species, and ])laced the shell under Xerophila, a 
European subgenus. So it may be omitted from Western xiustralian lists 
as it is unlike any local shell in size aiid form.] 
FAMILY XANTHOMELONTIDAE. 
The most notable mollusc in North Australia is a large thick globose 
shell, for which many years ago the descriptive name, Xaiitlinmelon, was in- 
troduced. It is common about Port Darwin, and goes eastward along the 
coast round the Cape York Peninsula and down toAvards Moreton Bay. As 
far as yet is known this form does not occur in Western Australia, an 
extraordinary result from superficial knowledge. In llu' interior of Australia, 
apparently degenerate relations live, and these penetrate into Western Aus- 
tralia in the mid and southern areas. This series, named ttinumeloii , ajpAears 
to be characteristic of the Centraliaii Area ; different foians, sjAecies or genera 
being develo])ed on each Range. 
Gciuis SINUMELON Ircdale 1930. 
1930 — Sinumelon Ircdale, Viet. Naturalist, XMl. XLVIL, p. 120, Xov. Ilaplo- 
type Helix nullarboriea Tate. 
1932 — Nutnbadistes Cotton and Godfrey, South Austr. Naturalist, Vol. XIII., 
lip. 169-170, Aug.-Septeniber 30. Orthotype Helix bitaeniata Cox 
flindersi Angas. 
These desert living Xanthomelontids, ranging all through the interior in 
suitable places, enter into southern Western xVustralia, and ai)parently all the 
