THE ANNALS 



AJfD 



:agazine of natueal history. 



FIFTH SERIES.] 

 No. 118. OCTOBER 1887. 



XXIX. — Bryozoa from New South Wales, North Australia^ 

 dec. By Akthur Wm. Waters. 



[Plate VII.] 



Part III. 



Ctclostomata. 



When describing fossil Cyclostomata I have had repeatedly 

 to point out how little is known about this suborder, and 

 how few characters there are that can be used in diagnosis. 

 The mode of growth has always been placed in the front 

 rank ; but this in other divisions has been clearly shown to 

 have secondary importance, and the same thing may to a 

 certain extent be seen here, for there is Lichenopora in both 

 single and confluent colonies and also occurring in many 

 layers. Then, again, Lichenopora and Discotuhigera, as D. 

 lineata, are very similar in appearance, but the structural 

 differences indicate that they should be widely separated. 



In the Quart. Journ. Geol. Soc. vol. xliii. p. 337, 1 pro- 

 posed to divide the Cyclostomata into Parallelata, in which 

 there are no cancelli, and Rectangulata, in which the openings 

 of cancelli occur between the zooecial tubes. Probably the 



Ann. & Mag. N Hist. Ser. 5, Vol. xx. 18 



