134 Proceedings of the Royal Society of Victoria. 



opening of the spiral. The orifices of the zooecia are not quite so 

 closely united and the adjacent margins are not produced. 



No figure was published by Lamouroux or Lamarck, but there 

 can, I think, be no doubt that this is the species intended by 

 them. Lamarck gives Schweiger as an authority for the name 

 A. convoliita, but I have not seen his work. It is undoubtedly 

 Busk's A. spiralis, and I can see no difference l)etween that and 

 his A. tortuosa, 



4. X. TORTUOSA, Tenison Woods. 

 (Plate A., Fig. -i.) 



Amathia tortuosa, Tenison Woods, Proc. Roy. Soc. Victoria, 

 June, 1879 ; MacGillivray in McCoy's Prod. Zool. Vict., pi. 185, 

 fig. 3. 



Amathia connexa. Busk, Challenger Polyzoa pt., ii., p. 35, pi. 

 vi., fig. 3. 



Zoarium forming long, straggling, irregularly divided, rather 

 slendei", cylindrical, transparent branches, several inches high. 

 Zooecia rather long, in biserial clusters at nearly right angles to 

 the stems and forming an open spiral of one complete turn, 

 occupying greater part of each internode but leaving a small 

 portion inferiorly free. 



Port Philip Heads. Port Jackson (Dr. Rainsay). 



There can be no doubt that this is the species described and 

 figured by ]Mr. AVoods, and that Busk's A. tortuosa, if not 

 identical, as I believe, with A. convoliita, is at all events quite 

 distinct from the present. 



5. A. DisTANS, Busk. 

 (Plate C, Fig. 3.) 



Amathia distans, Busk, Challenger Polyzoa, pt. ii., p. 38, pi. 

 vii., fig. 1 \ MacGillivray, Trans. Roy. Soc. South Australia, 

 June, 1889. 



Zoarium forming long, slender, straggling, transparent branches. 

 Zooecia irregularly biserial, united into clusters forming very open 

 spirals of about one complete turn occupying the upper half of 

 each internode. 



