84 DISCOVERY REPORTS 



Remarks. The genus Atapozoa was erected by Brewin (1956c) for a species found at Trigg Island, 

 near Perth, Western Australia. Atapozoa differs from Endistoma in having a stalked brood pouch, 

 and only two anterior papillae in the larva instead of three. 



There were no larvae in the ' Discovery ' specimens, and the brood pouch, if present at all, was in a 

 rudimentary state. The identification therefore rests on the other characters of the zooid and on the 

 structure of the colony, in all of which features there is close agreement with the type specimens. 



Distribution. Western Australia ; North Island, New Zealand. 



Text-fig. 24. Atapozoa marshi Brewin (St. 935): A, B, two colonies; C, zooid. 



Suborder PHLEBOBRANCHIATA Lahille, 1886 



Family DIAZONIDAE Garstang, 1891 



Genus Tylobranchion Herdman, 1886 



Tylobranchion speciosum Herdman (Text-fig. 25; PI. Ill, fig. 1) 



Tylobranchion speciosum Herdman, 1886, p. 157, pi. 22, figs. 1-17. 

 For synonymy see Kott (1954), p. 152. 



