54 
Toil Iredale. 
more circular, while the umbilicus is more hidden though still open: the | 
columella thickened with the outer lip reflected. Breadth, 20 mm.; height, 
17.5 mm. 
Bednall's record of focVnalis (Trans. Boy. Soc., South Austr., Vol. 
XVI., p. 63, Dec. 1892), from between Victoria Spring and Fraser Range 1 
may refer to this species. 
Sinumelon lennum sp. nov. 
Plate III., fig. 21. I 
1892— 7/e/(.r ((iiihijias) perinfl(ila Bediiall, Trans. Roy. Soc. South Austr., 
Vol. XVI., p. 62, December. Cnvatiagh Range. About three miles 
south of Camp 58, Victoria Desert.. Betwe(>n Fias:'r Range and 
Yilgarn noldti<'lds. Western Australia. [ 
Xot lleU.r pcriulUOn PfeilTer, Proc. Zool. Soc. (Bond.), 1863, p. 528, i 
Apl. 20, 1864, .MacDotmell Ranges, Central Australia. i 
Representatives of the perivllata series occur throughout the interior of 
South- AVest Australia varying in size and form according to locality. i 
Shell sul)globose, siiire short and conical, whorls rounded, sutures im- 
pressed, umbilicus ^'('^y narrow hidden by I’efloction of columella, mouth large 
and subcircular. Coloration green. Apex finely granulated, adult whorls 
4 V 2 , sculptured with faint radial growthlines, rvitli irregular granules cover- j 
ing'the whole surface tending to lengthen into beaded radials. Breadth, 
24 mm.; height, 21 mm. (type from Boulder). 
Specimens from Aladura are broader with the same height, the spire 
being shoi'ter and the body whorl more sw’ollen; those measure 26 mm. in 
Imeadth by 21 mm. in height, and may l)e called S. 1. mutuum subsp. nov. 
Sinumelon vagente sp. nov. 
Plate ITT., fig. 24. 
From Alt. Singleton, inland from Geraldton, comes a relation of 
perinjlata, more elevated and less inflated than lenmim, with a stronger 
granose sculiiture. 
Sludl subglobose, spire short, whorls rounded, sutures impressed, 
umbilicus very narrow almost concealed by expansion of columella, mouth 
large, round. out(‘r lip thin. Coloration brownish green. Apex finely radially 
granulosc', adult wliorls four, sculptured with fine irre.gular growth radials 
w’hieh are. overridden by a fine granulation. 
Columella strongly refiected and united to the outer lip by a thin callus. 
Breadth, 21 mm.; height, 19 mm. 
Genua PLEUKOXIA Anee.v 1887. 
lj ;87 — Pletiro.rid Aiicey. Conch. Evchange, Vol. II.. pt. 3, p. 38, Septem- 
ber, new name for 
2804 Ancp^sella Angas, Proc. Zool. Soc. (Bond.). 1863, 521, A]fl. -0, 
1864, ex A.' Adams AIR. Haidotype Belir cprtopleiira Pfeiffer. 
Xot Anr/afiiplla Crosse, .Toiirn. de Conch., Vol. XII., p. 50, footnote, 
,Ian. 1, 1864. 
These shells, referred on account of anatomical details, to the family 
Xanthomelontidae, are very nnlike typical members of that family in every 
conchological feature. 
