MOLLUSCA — HEDLEY AND MAY. 109 



wards, and we were led to believe from the fauna and composition 

 of the sea-floor that this powerful current swept tbe bottom clear 

 of mud, even at a depth of a hundred fathoms. 



We have here increased the known marine mollusca of 

 Tasmania by one-eighth. Probably so large a proportion will 

 never again be added in one act. Including fragments, illegible 

 or undetermined forms, the collection amounts to about two 

 hundred and eighty species, of which we record two hundred and 

 fourteen. Representatives of groups other than the mollusca have 

 been handed to specialists, and it is hoped that further reports 

 may appear. 



Under the giant cliffs of Tasman Island have sailed so many 

 great captains and so many famous naturalists, that the spot has 

 revered memories to inspire the worker of to-day. For here in 

 1642 passed Abel Janz Tasman in the " Heemskerch " and 

 "Zeehan." After a long interval the ill-fated Marion du Fresne 

 followed him in 177*2. Five years late came Cook in the 

 " Resolution." The " Recherche " bore D'Entrecasteaux with 

 La Billardiere in 1792. And PeYon with Freycinet under 

 Baudin voyaged in the " Geographe " and "Naturaliste" in 1802. 

 Past here again, in 1826, Quoy and Gaimard travelled in the 

 "Astrolabe" under Dumont D'Urville. From the deck of the 

 " Beagle " Darwin saw the huge basalt columns in 1836. Four 

 years later his friend Hooker, under Ross, passed in the " Erebus " 

 and " Terror." 



The following are the species identified. A star (*) indicates 

 that the species has not been recorded from Tasmania : — - 

 *Scissurella australis, Hedley. 

 Schismope atkinsoni, Tenison Woods 

 ,, pulchra, Petterd. 

 * Emargimda superba, Hedley and Petterd. 

 ,, Candida, A.Adams. 



Fissurella concatenata, Crosse and Fischer. 

 *Gibbiila galbina, Hedley and May. 

 * Monilea pliilippensis, Watson. 



C 'antharidus irisodontes, Quoy and Gaimard. 

 * C alliostoma columnarium, Hedley and May. 

 ,, incertum, Reeve. 



,, allporti, Tenison Woods. 



* ,, retiarium, Hedley and May. 



,, hedley i, Pritchard and Gatliff 



,, legrandi, Tenison Woods. 



Astele subcarinatum , Swainson. 

 *£asilissa niceterhim, Hedley and May 



