Mr. A. W. Waters on Australian Bryozoa. 19 



A figure of a young colony from Green Point is given in 

 order to show a zooeciura in the first stage, and those a little 

 older in which calcareous nodulated structure has been formed 

 on the surface and in which the avicularian chambers are 

 being formed. 



hoc. Victoria ; New Caledonia ; Port Jackson, New South 

 Wales. 



Rhynclwpora longirostris, Hincks. 

 Rhynchopora hmgirostris, Hiucks, Ann. & Mag. Nat. Hist. ser. 5, vol. 

 viii. p. 125, pi. iv. ligs. 7, 8; Waters, Quart. Jouru. Geol. Soc. 

 vol. xliii. p. 70, pi. vii. tig. 22. 

 Mucronella tuhulosa, Hincks, op. cit. vol. vi. p. 383, pi. xvii. fig. 7. 



In my specimens from Victoria and Green Point the processes 

 are irregularly nodulated. 



There is one curious abnormal mandible formed by the coales- 

 cence of two at their distal ends, so that there are two bases. 



Log. Living : Curtis Island (77.) ; Victoria ; Green Point, 

 Port Jackson, New South Wales. Fossil : Napier, New 

 Zealand. 



CeUepora columnaris, Busk. (PI. II. figs. 1-G.) 



Celkpora columnaris, Busk, Zool. ' Challenger ' Exp. pt. xxx. p. 194, 

 pi. xxix. fig. 11, and pi. xxxv. fig. 16. 



CeUepora cidaris, MacG. Zool. of Vict. dec. xvii. p. 243, pi. clxv. 

 fig. 4. 



I did not appreciate that the specimens from Green Point 

 were the columnaris of Busk until I saw the ' Challen2:er ' 

 specunens. 



The columns are often very thick, occupying more space 

 than a zooecium, and extend through several layers of the 

 zoarium ; they are solid throughout, but the central portion 

 is more transparent than the outer, and the radiating lines 

 only occur in the outer layer. I would call the attention 

 of palasontologists studying sections of problematic organisms 

 to section fig. 4. The surface of the zooecia and columns are 

 granulated, and the structure is no doubt the same as that of 

 C cidaris., though in no parts so strongly tuberculated as in 

 MacGillivray^s figure ; the ovicells are not abundant, and 

 where they occur are so much buried that the characters can- 

 not be made out, but the surface appears to be plain ; one large 

 spatulate avicularium has been seen on one of the colonies. 



Loc. Bass's Straits, 38 fath. ; Port Phillip Heads {MacG.) ; 

 Green Point, Port Jackson. 



CeUepora granam^ Hincks. 

 For synonvms see Waters, Ann. & Mag. Nat. Hist. ser. 5, vol. xx, 

 p. 198. ' 



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