66 Notes on some Upper Palceozoic Polyzoa, 



Art. XIII. — Notes on Some Upper Palceozoic Polyzoa, 

 from Queensland. 



By R Etheridge, Jvn., F.G.S. 



[Read 12th April, 1875.] 



The geographical distribution of fossil species being a 

 point of some importance in palseontological inquiry, I have 

 the pleasure of forwarding to the Royal Society a few notes 

 on the occurrence of certain species of polyzoa in the upper 

 palaeozoic rocks of Queensland, which have hitherto been 

 recorded from similar deposits in New South Wales and Tas- 

 mania. The specimens in question form part of a collection of 

 corals forwarded to me by my friend Richard Daintree, Esq., 

 F.G.S., with a view to their identification, and for which 

 I take this opportunity of returning him my best thanks. 

 The specimens of polyzoa are all in the form of casts, but 

 from the manner in which some of the pieces of matrix are 

 crowded with the polyzoal remains, one of the species at 

 least, Polypora ampla, Lonsdale, must have existed in 

 considerable quantity. I have been enabled to recognise 

 three species, viz., Polypora ampla, Lonsdale, Fenestella 

 fossula, Lonsdale (a form allied to), and an undetermined 

 species of Fenestella. 



For the very truthful drawings accompanying these notes 

 I am indebted to my friend and colleague, C. R. Bone, Esq., 

 draughtsman to the Geological Survey, London. 



Polypora ampla, Lonsdale. Figs. 1 and la. 



Description. — The polyzoarium is regular and infundibuK- 

 form, with the celluliferous surface looking inwards ; the 

 interstices are straight, broad and flat, branching dichoto- 

 mously, with the celluliferous surface covered with numerous 

 rows of alternating cell apertures, and they enlarge 

 considerably previous to bifurcation ; the dissepiments are 

 short ; the fenestrules large, with the margins sometimes a 

 little crenulate from the projection of the lateral rows of 

 apertures ; the cell apertures themselves are round, with 

 slightly projecting margins ; the reverse face is granular. 



References. — Fenestella ampla, Lonsdale, Darwin's Oeol. 

 Obs. Volcanic Islands, 1844, Appendix p. 163 ; ibid., Morris, 

 Strzelecki's Physical Lescr. N. S. Wales, &c. 1845, pi. 9, 



