106 THB RECENT MOLLUSCA OF TASMANIA. 



and Area trapezia (Deshayes). The rare Astele subcari- 

 nata (Swainson) was first described from Tasmanian speci- 

 mens, and on one occasion, at least, in recent years it has 

 been washed up in abundance at Marion Bay. The beauti- 

 ful Modiola arborescens (Chemnitz) was thrown up plenti- 

 fully on the Port Sorell beaches. North Coast, a few winters 

 ago, not having been seen there before, though occasionally 

 it had been dredged in DEntrecasteaux Channel. The 

 type specimens cam© from the West Indies; the species ex- 

 tends to China also. lanthina communis (Lamarck) and 

 I. exiffua (Ibid), the violet floating sea-snails, are sometimes 

 washed on to Tasmanian shores. 



