RT Journal Article
SR Electronic
T1 Fossil Cyclostomatous Bryozoa from Australia
JF Quarterly Journal of the Geological Society
JO Quarterly Journal of the Geological Society
FD Geological Society of London
SP 674
OP 697
DO 10.1144/GSL.JGS.1884.40.01-04.55
VO 40
IS 1-4
A1 Waters, Arthur Wm.
YR 1884
UL http://jgs.lyellcollection.org/content/40/1-4/674.abstract
AB I have already described in the Journal of this Society the Chilostomatous Bryozoa from Curdies Creek, S.-W. Australia (vol. xxxvii.), Mount Gambier, South Australia (vol. xxxviii.), Bairnsdale, Gippsland (vol. xxxviii.), and Muddy Creek, Waurn Ponds, and Bird Rock, Victoria (vol. xxxix.). But the Cyclostomata I kept back, in order to deal with them all together; and since I completed my last paper I have received for description from Prof. Tate an interesting collection from Murray Cliffs and Aldinga, South Australia, and all are now considered together. I have also in my hands a collection of fossils (belonging to Miss E. C. Jelly) from Napier, New Zealand, to which I allude in the text.The determination of the Cyclostomata presents much greater difficulties, and is much more unsatisfactory than that of the Chilostomata, as there are fewer characters which can be used, so that classification has been made to depend principally upon the mode of growth—a character which has frequently proved of no value in the Chilostomata. Until within a recent period this was in both considered the main characteristic; but now, thanks to the labours of Smitt, Hincks, and other recent workers, it has been shown to be of secondary importance in the classification of the Chilostomata, swhich, however, possess many distinctive characters, such as the form of the cell or zoceeium, together with the shape of the aperture (which is, perhaps, best indicated by the shape of the operculum) ; the presence, in a large number of cases, of