80 



Pectunculus laticostatus, Angas (non P. flabellatus, T. 



Quoy and G-airnard). Woods. 



Liniopsis Macgillivrayi [A. Adams], L. Belcheri, Ads. and 



Angas. Bv. 



Pecten australis [Sow.], Angas. -j ' marc j t 



_. . , , . ,, . , ~ ^(P• fumatus, var. albus,. 



Pecten laticostatus, Angas (non bray; . j m . 



Lima squamosa, Angas (non Lamk.). L. multicostata, Sou: 

 Ostrea cucullata [Born], Angas. Not living here. 



Ostrea edulis [Linn?], Angas. O. Angasi, Sow. 



A large majority of the molluscan inhabitants of our ocean 

 waters are common to the province which embraces the coast- 

 line of extratropical Australia ; of the Lamellibranchiata, 130 

 species belong to it, of which 32 are unknown at present 

 beyond the limits of this colony ; 26 species are migrants from 

 the Indo-Pacific Province which extends to North Australia, 

 and reaches on the west coast to Shark Bay and on the east to- 

 Port Curtis or Wide Bay ; two, if not three, are cosmopolitan. 



Of the species of Palliobranchs, four are essentially Austral- 

 ian, whilst the fifth is common to South Australia and Chili. 



The greatest community of species of bivalves is with Tas- 

 mania, 75 actually known ; with New South Wales, 63 ; with 

 south-western Australia, 31 ; with Victoria, 29 ; and with New 

 Zealand, 15. 



The following exotic species appear sporadically, as it were, 

 in South Australia : — Ga&trochcena laniellosa, Tellina capsoides, 

 Yenerupis exotica, Donax cardioides, Lucina fabula, CarditeUa 

 infans, and JBarbatia lima. 



CLASS LAMELLIBRANCHIATA. 



Family Teredinid^. 



1. Teredo sp. 



Burrowing in submerged timber, Holdfast Bay and Port 

 Adelaide. 



Tube thin, slender, septated internally ; valves like T. norvegica. 

 Siphonal pallets unknown, therefore the exact systematic posi- 

 tion indeterminable. Possibly it may be Xylotrya antarctica, 

 Hutton, inhabiting New Zealand and Queensland. 



Family Piioladidje. 



2. Barkea similis, Gray, in Dieffenbach's N. Zealand, vol. 

 2, p. 254 ; also Eeeve's Mon. Pholas, f . 10. 



Burrowing in clay at low-tide mark, Port Lincoln, St. Yin- 

 cent Gulf, and South-East coast ; also in Tasmania, New South 

 Wales, and New Zealand. 



A white delicate shell, acuminate anteriorly. 



