186 Mr. A. W. Waters on Australian Bryozoa. 



Cellularia diplodidymwides^ Meun. & Pergens (Bry. du 

 Syst. Montien, p. 3) is also apparently somewhat allied. 

 Loc. Off Raton, New Guinea, 7 fath. 



35. Thalamoporella Bozieri (Aud.). 



Flustra Rozieri, Atid. Descr. de I'Egypte, pi. viii. fig. 9. 

 Membranipora Rozieri, Busk, Brit. Mus. Cat. p. 59, pi. Ixv, fig. 6. 

 Stegcmoporella jRozieri, Hincks, Ann. & Mag. Nat. Hist. ser. 5, vol. vi. 



p. 379, pi. xvi. ; Waters, Quart. Journ. Geol. Soc. vol. xxxviii. 



p. 505. 

 Eschara ignohilis, Reuss, " Foram. Anth. & Bry. des Septarientho- 



nes," Deukschr. Ak. Wissensch. Wien, xxv. p. 181 (65), pi. vi. fig. 14. 

 Vincidaria nov<s-liollan(li(B, Haswell, " Polyzoa from the Queensland 



Coast," Proc. Linn, Soc. N, S. Wales, vol. v. pt. i. p. 41, pi. iii. 



fig. 3. 



The zoarium of the Darnley-Tsland species is always tubular, 

 or, as we may call it, in the Vincularia-ior'm. It has neither 

 avicularia nor ovicells, and the " marginal tuberosities '"* are 

 only occasionally found. The oral aperture is rounded below. 



This is undoubtedly the V. novce-hollandice of Haswell, but 

 does not seem to be the Vincularia gothica, Busk (Challenger 

 Rep. p. 72), which he, however, unites with novw-hollandice 

 and with Vincularia steganoporoides^ Goldstein. This last is 

 larger than the Darnley-Island specimen, and it seems open 

 to doubt whether it should be placed here or with gothica. 



I still feel doubtful about the Steganoporellidee, but it 

 seems right to follow Mr. Hincks as long as I have not made 

 an exhaustive study of these families ; but in attempting to 

 bring this and the family Microporidse into order we get very 

 elaborate descriptions of the division of the zooecium into 

 various chambers. In many cases it seems that it would be 

 simpler to say that the anterior portion is prolonged by a 

 tubular extension ; in fact, the chamber for the polypide is 

 flask-shaped, and the end is closed by an operculum. In 

 most cases the operculum is partly attached to the integument 

 which covers the front, but it is usually also attached to the 

 calcareous wall by a small ridge at the side. 



Taking fig. a as a type, and slightly altering Fig- ^'• 

 the form of the aperture, making the neck 

 narrower or wider, and placing the pores in 

 different positions in the space formed be- 

 tween the neck and the lateral walls, we shall 

 find that we have a large series of Microporidse 

 and Steganoporellidee, and my present opinion 

 is that many things that have been removed 

 from the Microporidas will have to be brought 

 back there again. 



Loc. Living : in different varieties from 



