Palaeozoic Genus Ha 



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Slrophomena fanliquata, Sow. sp. 

 Stropheodo7ita (Leptosirophia) alaia, Chapm 

 Bivalves — 



Cotwcardnim bellulum, Cresswell sp. 

 Mytilarca acuiirostris, Chapm. 

 Nticulif.es viaccot/ianus, Chapui. 

 Palaeoneilo raricosiae, Chapm. 

 •Gasteropods — 



Bellero2)ho7i fasciatus, Liiidstiom. 

 Pletirotomariii maccoyi, Chapm. 

 Comdaria sotverhii, Defr. 

 Cephalopod — 



Orthocuras lineare, Miinster sp. 

 Trilobites — 



Lichns austialis, IMcCoy. 



Odo)itopleura jenkinsi, Efch. til. and MitchV^V 

 Odontopleura raftei, Eth. hi. and Mitch. \^^>-.'^A»5 

 PhacojJS sweeti, Eth. fil. and Mitch. \..^ 



Ostracods — 



Beyriclna kloedeui, McCoy. 

 Beyrichia kloedeni, var. granulata, Jones. 

 Beyrichia ?vooriyallockensis, Chapm. 

 Beyrichia ligatura, Chapm. 



Beyrichia maccoyianus, Jones, var. australiae, Chapm. 

 Cinipede — 



Turrilepas cf. yeringuie, Chapm. 

 It has l)een suggested by Miss O'Connell, in the case of the Water- 

 lime Hercynellas that being thin-shelled they probably lived under 

 fi-esh or brackish-water conditions, and were subsequently swept by 

 rivers into the sea. Our Victorian species is, like the Waterlime 

 fossils, apparently thin in texture, but the perfect condition of .the 

 cast of the figured type is so striking as to preclude the idea of its 

 having drifted into the marine mud. 



The absence of eurypterids from the Yeringian, and, with one 

 exception, all ceratiocarids, both groups of which are so common in 

 the Waterlime series of North Buffalo, is additional evidence in 

 favour of a marine origin for the Victorian Yeringian deposits. 

 The same cannot be said, however, of the Melbournian sediments, 

 whose fauna contains a Pferygotus and numerous ceratiocarids. 



That the mudstone of locality B 23 is of marine origin is evident 

 from the fairly large assemblage of brachiopods, bivalves and gas- 

 teropods which it contains. The thin-shelled condition, not only of 



