Polyzoa from Port Phillip. . 15 



Geographical distrilmtion of P. Isevis, var. subcompressa. 

 — Porto Praya, St. lago, Cape Verd, 100-150 fath. 

 {' Challenger ') ; Port Phillip. 



It will be seen from the above list of localities that the 

 range of this species extends over a very wide area. 



Suborder Cyclostomata. 



Family Tubuliporidse. 



Genus Idmonea, Lamouroux. 



Idmonea marionensis, Busk. 



For references and localities see Bask, Chall. Rep,, Poly- 

 zoa, pt. ii. p. 11. 



Family Horneridae. 



Genus IIoeneea. 



Hornera lichenoides, Linn. 



For geographical distribution see Busk, Chall. Rep., Poly- 

 zoa, pt. ii. p. 16. 



Family Tubuliporidse. 



Genus Entalophora, Lamouroux. 



Entalophora parasitica^ Busk. 



The Port Phillip specimen presents one trifling difference 

 from Busk's description. The surface of the zooecia is 

 whitish and marked with brown spots, instead of being 

 brown and marked with white spots. 



Hah. Attached to horny fibres of Catenicella. 



hoc. New Zealand {Buslt) ; Port Phillip. 



Genus BiDiASTOPOEA, d'Orbigny. 

 Bidiastopora torquata, n. sp. (PL II. figs. 2, 2 a, 2 Z*, 2 c.) 

 ? Bidiastopora comp'essa, d'Orb. 



Zoarium erect, dichotomously branched, the branches 

 compressed, bilaminate, twisted on their long axes, diameter 

 1-1 -o millim. Zooecia arranged in oblique half-spiral 



