ON MOLLUSCA FROM THE MONTE BELLO ISLANDS. 665 
37. Report on Mollusca collected at the Monte Bello 
Islands. By Tom Irepate * 
[Received March 18, 1914: Read June 9, 1914. ] 
(Text-figure 1.) 
INDEX. Page 
Geooraphicalerel ations Myspace seteee se eereeeeesescese-eeseicnitecinneaseie eters OOD 
Bistrot Shellsicollectedteaee-.eetrernceecre costo ceserceeeeesesencaciaensccte crs: OOO 
Systematic :— ; 
J UETOR TACs, SIS 1D oocigeeesn sen abo pbnnOn ebb ox non DedccDoneEcHEEE | OL 
Subularia montebelloensis, sp.N. ....... Be bon Cac coucer so Ree ere mn oH Ka) 
Scaphella hedleyi, nom. nov., for 8. act depsmeeeacoaree od ON 
The small collection brought back by Mr. P. D. Montague is 
still of much interest on account of the geographical position of 
the group. 
Hedley, in the Proc. Linn. Soc. N.S.W. vol. xxvii. pp. 876— 
883 (1903), introduced divisional names to indicate the different 
faunal elements recognisable in the Marine Fauna of Australia. 
He determined four primary divisions, to which he gave the 
names Adelaidean, Peronian, Solanderian, and Dampierian 
Regions. The limits of the Adelaidean Region were noted as 
probably being Wilson’s Promontory in Victoria and Geraldton 
in West Australia, embracing the whole southern coast of 
Australia and round the south-west corner. The Peronian 
Region designated the East Coast from Wilson’s Promontory 
north to Moreton Bay in South Queensland. The Solanderian 
Region was given to the remainder of the Queensland coast 
northwards to Torres Straits; whilst the Dampierian Region 
extended westwards from Torres Straits to Houtmann’s Abrolhos, 
scarcely north of Geraldton, West Australia. 
Verco (Trans. Roy. Soc. South Austr. vol. xxxvi. pp. 202-205, 
1912) has now given a list of common Geraldton and Houtmann’s 
Abrolhos marine molluses, which have been clearly shown to 
belong to the Adelaidean Region, as out of a total of 150 species, 
71 per cent. were also found in South Australia. This suggests 
that the limit of the Adelaidean must be placed north of 
Houtmann’s Abrolhos, and I can now show that few Adelaidean 
forms extend as far north as the Monte Bello Group. 
Hedley recently catalogued the Queensland Marine Molluscan 
Fauna (Proc. Austr. Assoc. Adv. Sci. Brisbane, 1909, pp. 343— 
371 & 809-810), when he mentioned over 1800 species. Very 
numerous additions have since been made. 
No list: of West Australian Marine Mollusca is known to me, 
but it would be of great advantage to zoogeographers were such, 
when prepared, shown under Hedley’s regional names. 
* Communicated by Prof. J, Srantey Garprner, M.A., F.RS., F.Z.8. 
