330 THE PROCEEDINGS OF THE LINNEAN SOCIETY 



Oenus Pal^oseris. Duncan, 1870. 



This genus was founded by Prof. Duncan for a fossil which he 

 had formerly described as Troehoseris Woodsi, but a minute 

 examination induced him to place it among the Lophoserince as 

 it was found to possess syuapticulee. 



The corallum is simple, turbinate, and pedicellate ; septa 

 numerous ; columella rudimentary ; epitheca complete, dense, 

 covering costse. 



Pal.eoseris woodsi, Duncan. 



Corallum with small pedicel, cylindrical, conical, turbinate ; 

 calice wide, circular, shallow, margin thin ; septa delicate, 

 crowded, subequal, not exsert ; six systems and five cycles with 

 half of a sixth in each system ; smaller septa generally joining 

 the larger which reach the central fossula ; laminae marked 

 laterally by synapticulee. Alt. 16, lat. 13 mil. Muddy Creek. 



Mjsandroseris Australia, L. Bousseau, 1854, and Favia 

 Bowerbanhii, Val. are species which I believe belong to the 

 tropical regions of Australia, amid the islands of the great 

 Barrier Keef, though cited simply as from Australia by 

 authors. To these must also be added Prionastrwa australiensis, 

 and Merulina ramosa. Echinoyora rosularia, Lamarck, is a reef- 

 building form which is cited as coming from " Terre de Van 

 Dieman." From this circumstance it has been attributed to 

 Tasmania. It must be, however, that the Terre de Van Dieman 

 in North Australia is meant, because no such coral is known 

 outside the tropics in Australia, and therefore certainly not in 

 Tasmania, formerly known as Van Dieman's Land. As far as I 

 can gather, the term Terre de Van Dieman as applied to part of 

 North Australia, is only used by old French geographers. It is 

 thus distinguished on the map prefixed to the work of De Brosses. 

 The coral occurs at the Seychelles and Feejee. I have also seen 

 specimens from the northern parts of the Barrier Reef. Rhodaraia 

 calicularis, Lamarck, is another tropical reef-building form which 

 is cited generally as from Australia. It is a Porites without a 

 columella. 



