70 W. J. H<tvrls: 



sunies the northerly pitch found elsewhere near Castleniaiiie, is Avhat 

 might l>e expected if the Lower Darriwil beds overlay immediately the' 

 Upper Castlemaine. In the same way, as D. hifidus succeeds T^ 

 fruticosLis, Cardiograptus morsus, gen. et. sp. nov., is, at some- 

 localities, found with Oncogrnptus vpsilon. Then Oncograptus up- 

 silon disappears, and at Guildford beds containing Cardiograptus 

 morsus, also contain Diplograptus, cf. aiigustifolius, and this latter 

 form is connuon with Upper Darriwil forms in a neighbouring 

 bed. This is also true of other undescribed forms. 



{f) Siibdivisions. 



The manner in which the Tapper Castlemaine beds merge into 

 beds in which OnwgrajJtus occurs has already been discussed. At 

 each of the four outcrops mentioned, in w-hich the nearest beds arte 

 Upper Castlemaine, Oncograptus u'psilon occurs, and Cardiograp- 

 tus morsus does not. If it were at all common in these bed's suffi- 

 cient exploration has been done at least at two of them to reveal 

 it. Cardiograptus morsus has never been found in Upper Castle- 

 maine beds. These facts seem to indicate that Oncograptiis upsilon 

 is representative of the lowest zone of the series. At Macedon, where 

 the Lower Darriwil Ijeds are well developed. Cardiograptus morsuf 

 appears to be absent, at any rate from some beds, if not from all. 



At Castlemaine localities furtlier west than those above mentioned 

 0. upsilon and Cardiograptus morsus are found in association, both 

 forms being common. At Guildford 0. upsilo?i has not been found, 

 though Cardiograptus morsus is common. This would suggest that 

 C. morsus came in later than 0. upsilon and outlived it, which is 

 supported by the fact that on the Guildford-StrangAvays Railway 

 the Cardiograjifus beds occur both east and west of typically Upper 

 Darriwil beds. These Cardiograptus beds contain at least one spe- 

 cies, 1). cf. angnstifolius, otherwise restricted to the neighboi^ring 

 Darriwil. The Upper Darriwil beds at Guildford contain Logano- 

 graptus, Diplograptus cf. angustifolius, D. caduceus (varieties), 

 Diplograptus gnomonicus, sp. nov., Trigonograptus, Lasiograptus,. 

 Glossograptus, and Didymograptus v-deflexus, sp. ijov. No genus 

 found at the typical Upper Darriwil locality (W.L.S. 1, \ S., 19 

 S.W.) is wanting here, except Climacograptus, and even at Darriwil 

 Climacograptus does not appear to be common, as an examination 

 of slabs in the National Museum, Melbourne, failed to reveal any 

 specimen of the genus. At Darriwil, also (W.L.S. 2 and W.L.S. 3) 

 Cardiograptus morsus is found, but not near enough to W.L.S. 1 

 to render exact correlation possible. It is instructive to find that 



