643 
series of obliquely vertical lines, the surface being otherwise spirally ridged, the ridges and 
intervening sulci about equal, the former passing over the tubercles. Aperture much 
expanded ; canal oblique, open and wide ; outer lip very much foliated and thickened, 
with a sinuosity of greater or less depth ; inner lip reflected, thickened above and 
beneath. 
Obs. This fine species appears to occur in a fossil state near Brisbane in as great 
profusion as it does in the estuaries of the eastern coast of Australia at the present 
time. In some specimens the mouth is greatly thickened, especially the outer lip, 
forming a strong varex (PI. 36, fig. 16). Its amount of sinuosity also varies, being very 
sharp in some specimens, and obtuse in others, when the lip is much thickened. 
Zoc. and Horizon. Child’s Vineyard, Nudgee, about nine miles from Brisbane 
(jB. L. Jack) — Estuarine Beds (Haised-beaeh) . 
Family— NATICID.®. 
Genus — I^ATIGA, Adanson, 1757. 
(Hist. Nat. S^n^al, Coquil., p. 172.) 
Natica plumbea, Lamarck, PI. 36, fig. 13. 
Natica plumhcay Lamarck, Hist. Nat. Anim. sans Vertob., 1822, vi., Pt. 2, p. 198, 
„ „ Reeve, Conch. Icon. (Mon. Natica\ 1855, ix., Sp. 34, t. 9, f. 34, a and 6. 
Obs. The fossil possesses the oblong-turbinate shape, conoid spire, infra-sutural 
flattened space on each whorl, and the narrow, elongate umbilicus of Natica flmnbea. 
Loc. and Horizon. Child’s Vineyard, Nudgee, about nine miles from Brisbane 
{B. L. Jack) — Estuarine Beds (Raised-beach). 
Order— PULMONATA .* 
Obs. We are greatly indebted to Mr. Charles Hedley, F.L.S., for the following 
epitome of his views on the origin and distribution of the Australian Pulmonifera. As 
these have an interesting geological bearing we are glad to avail ourselves of the 
opportunity of inserting them f : — 
“ One of the most remarkable facts yielded by an analysis of the Australian 
Land Molluscan Fauna is that the operculate snails are confined to a narrow strip of 
land along the Queensland coast. Proceeding southwards from Torres Straits they diminish 
gradually till the last outpost of the invading army is reached about the Clarence River, 
in N. S. Wales. The sole apparent exception to this rule is Truncatella, which spreads 
to Tasmania and South Australia, but as this genus is strictly littoral, and evidently 
migrates not by land but by sea, it cannot be considered as a disturbing factor in my 
generalisation. Contrasting the fauna of Queensland with the more typically Australian 
and probably archaic fauna of Tasmania, Victoria, and Western Australia on the one 
side, and that of New Guinea on the other, it will be seen that this foreign aspect of the 
* In addition to the species enumerated here, Messrs. C. T. Mussou and C. Hedley have recorded 
the following species from Olsen’s Caves : — 
Helix {Charopa) iulauka, Forbes. 
,, (Bhytida) splendidula, Pf. 
,, „ „ ,, var. strangeoides, Cox. 
Pupina Coxi, Morelet. 
,, meridionals, Pf. 
{See Proc. Linn. Soo. N. S. Wales, 1892, vi. (2), pp. 551-564.) 
t Land Molluscan Fauna of British New Guinea (Anatomical Supplement). Proc, Linn. Soc. 
H. S. WaUs, 1892, vi. (2), Pt. 4, p. G94, 
