THE 



Transactions 



OF 



The Royal Society of South Australia 



(Incorporated.) 



Vol. XLV. 



Crinoids from the Cretaceous Beds of Australia, 

 with Description of a New Species. 



By Professor Walter Howchin, F.G.S. 

 [Read April 14, 1921.] 



Plate I. 



The Crinoidea are only sparingly represented in beds of 

 Cretaceous Age in Australia. Up to the present time there 

 has been only one species determined, and this only reported 

 from two localities, both of which are in Queensland. 0-) The 

 muddy character of the Cretaceous sea in this part of the 

 world appears to have been unfavourable for the development 

 of this class of organisms. It is now my privilege to submit 

 to the Society brief descriptions of three additional examples, 

 including a new species. 



Pentacrinidae. 



Genus Isocrinus, Von Meyer. 



. Isocrinus australis (Moore). 



PL i., figs. 1 and 2. 



Pentacrinus australis, Moore, Quart. Journ. Geol. Soc, xxvi., 

 1870, p. 243, pi. 17, fig. 3; pi. 18, fig. 1. 



Pentacrinus australis, Eth. fil., Cat. Austr. Foss., 1878, 

 p. 105. 



Pentacrinus australis, Eth. fil., Geol. and Pal. Q'land, etc., 

 1892, p. 439, pi. 20, figs. 1-3. 



Isocrinus australis, Eth. fil., Dept. of Mines, Q'land, Geol. 

 Sur. Bull., No. 13, 1901, p. 6, pi. 1, fig. 4; pi. 3, figs. 1-3. 



(i) It is unfortunate that in each instance where the remains 

 have been described no colunmals have been present, which is a 

 distinct loss in the way of determination. Moore says, "In a 

 block from Wollumbilla a portion of a column, with 95 regular 

 joints, is present, of probably the same species" (loc. cit.). It is 

 to be regretted that these were not figured. 



