52 Harris and Crawford: 



Climacograptus, sp. 



Glossograptus, recorded by McCoy as Diplograptus 



mucronatus. 22 

 Nemagraptus ( ?). 

 Cryptograptus tricomis, Carruthers. 

 PleurograpHis, or an allied genus. 

 Retiograptoid form. 

 Didymograptus, sp. — horizontal forms. 

 Rhino pterocaris maccoyi, Eth. fil. 

 Siphonotreta micula, McCoy. 



A third locality is the Gisborne " wash-out," already men- 

 tioned. The shales here are white and light blue, slickensided, 

 and decomposed. In some bands graptolites are plentiful, but, 

 as might be expected, badly preserved; yet, strange to say, forms- 

 showing distinct retiograptid structure were found. There 

 occur — 



Dicellograptus sextans, J. Hall. 



„ cf. elegans, Carruthers. 



Diplograptus, spp. 



Climacograptus, sp. 



Glossograptus, sp. 



Didymograptus, sp. 



Nemagraptus gracilis, J. Hall. 



Retiograptus geinitzianus, J. Hall. 



Many of the other outcrops are indicated on the map. 



No attempt has yet been made to indicate graptolite zones in 

 the Upper Ordovician rocks of Australia, nor has sufficient in- 

 formation been gathered to warrant any detailed attempt. The 

 difficulties encountered in identification have already been men- 

 tioned. These difficulties, the poor state of the fossils, and the 

 absence of the economic considerations which directed attention 

 to the Lower graptolite shales of the goldfields, are responsible 

 for the comparative neglect of richly fossiliferous beds within 

 30 miles of Melbourne. The geological survey of Northern 

 Gippsland 23 has already provided valuable material, and further 

 work in that area may solve problems for which nearer localities 

 furnish insufficient data. We have found that the following 

 distinctions seem to hold good throughout the district we have 

 studied : — 



22. Ibid. p. 10, p. 10, PI. I., Fig. 5. 



23. 13, p. 7 (Detailed references in footnote) 



