BY R. VON LENDENFELD, PH.D. 419 



PASYTHEA QUADRIDENTATA. Lamouroux. 



This species is found at Fitzroy Island and Port Stephens. It 

 has been described by Lamouroux 1), Ellis and Solander (2), and 

 Lamarck (3) under the name of Sertularia quadridentata, and 

 by De Blainville(4) under the nameof Tuliparia quadridentata. 



PASYTHEA HEXODON. Busk. 



This species was found by Busk (5) at Cumberland Island and 

 described by him. 



6. GENUS. IDIA. Lamouroux. 



Colonies pinnately branched. The Trophosomes form two 

 continuous series in contact with each other along the front of the 

 stem. Gonotheca on the front of the stem. 



IDIA PRISTIS. Lamouroux. 



This species is found in many parts of New Zealand Coast, 

 and has been described by Lamouroux (6) and Busk (7). 



7. GENUS. THUIARIA. Fleming. 



Colonies with branching stems. Trophosoms biserial not in 

 pairs, usually more or less immersed. Gonothecae similar to those 

 of Sertularia. 



(I.) Lamouroux. Histoire des Polypiers Coralligenes flexibles, p. 156. 



(2.) Ellis and Solander. The Natural History of many curious and 

 uncommon Zoophytes, p. 57. 



(3.) Lamarck. Histoire Naturelle des Animaux sans Vertebres. Tom 

 II., p. 121. 



(4,) Blainville. Manual d'Actinologie. 



(5.) Busk. Voyage in H. M. S. .Rattlesnake. Vol. I, p. 395. 



(6.) Lamouroux. Histoire des Polypiers coralligenes flexibles. 



(7.) Busk. Voyage in H.M.S. Eattlesnake, Vol. I., p. 390. 



