EROId THE AUSTRALIAN TERTIARIES. 



421 



except in the matter of ornamentation. The ornamentation is of 

 small tubercles, crenulated and perforated and surrounded by a plain 

 scrobicular area flush with the test ; the scrobicules are separated 

 by a very delicate granulation. This ornamentation is largest 

 actinally and resembles that of H. suborbicularis, Agass. The 

 shape of the test resembles that of H. Perizi, Sismonda, and the 

 very shallow anterior groove is smaller than that of II. subglobosus. 

 The figure of the apical disk is in part incorrect, and the woodcut 



Apical System of Holaster australi^e, Duncan. 



now given should supersede it. This is a true Holaster, and so is 

 the species which I wrongly attributed to an abnormal form of Rhyn- 

 chopygus — R. dysastewides, Dune. 



17. Holaster difeicllis, Dune, 



Rhynchopygus dysasteroides, Dune. op. cit. p. 49, pL iii. figs. 

 9 and 10. 



The specimen has been crushed from above downwards, but there 

 is no doubt in my mind now that the apical system is Holasteroid 

 and not Dysasteroid. The ornamentation is Holasteroid. Other- 

 wise the descriptive part of the notice of this species given in the 

 communication now under revision is correct, but all the references 

 to the affinities on p. 50 are erroneous. Both of the Holasters came 

 from the Upper Coralline beds, Castle Cove, Cape Otway. 



18. Micraster brevistella, Laube, op. tit. p. 192, fig. 7, non 8 ; 

 and E. Etheridge, jun., Quart. Journ. Geol. Soc. vol. xxxi. 

 p. 448, figs. xi. & xii. 



This species has been fully elaborated by the above-named 



