Ordoviciaii RocLs. 63 



Gully especially leaves no room for douljt as to the succession of 

 these beds. 



X. Dappiwii Series. 



(As before stated. Dr. Hall's term Darriwil has been extended to 

 include new beds.) 



The stratigraphical position of the series, which has as its asso- 

 ciated fossils Trii/o/iof/rnpfus, sp., Didymograpius caduceus (Salter), 

 IJ. v-deflerKs^ sp. nov., Oncograpfu.'^, spp., Glossot/rapfus, sp., 

 DijjlograptiiJ^ giiomonicus, sp. nov., and other forms as yet 

 iindescribed. is on the negative evidence afforded by tlie work 

 of others and myself, above the Castlemaine series. The sound- 

 ness of Dr. Hall's subdivision of the Castlemaine series, con- 

 firmed, as it is, by the work of Mr. T. S. Harfi at Daylesford 

 and by my oAvn at Castlemaine, permits of no other conclu- 

 sion. With the exception of the outcrops mentioned (at 73^ 

 miles), Oncograptiis has not been found east of Castlemaine. To 

 the west of the town the 0/icograptus facies prevails, beds with 

 Oncograptus or its associated forms, being numerous and wide- 

 spread. One of the most easterly outcrops is in a cutting on the 

 Woodbrook Road near the north-west of the mvmicipality of Castle- 

 maine. The material taken from the cutting is very much dec-om- 

 posed and cleavage is troublesome. Oncograptus iipsilo/i, T. S. 

 Hall, is common, D. caduceus in most of its varieties is exceedingly 

 common, and T. serra, Brong, is connnon. Trignnograptus is not 

 uncommon, while Dijdograptus sp., and Didymograptus v-deflexus, 

 sp. nov., are found. PhyllograjJtus does not seem to occur. Dij)lo- 

 graptus gnomonicus, sjJ. nov., may be present, but it is so delicate 

 that even if it be present it is not likely to be found in the material 

 available. Along the same line of strike the nearest beds are 1| 

 miles to the south, and are Upper Castlemaine. About 400 yards 

 west of this Woodbrook Road locality another outcrop occurs in 

 which Phyllograpfus is common, and is there, as in some other parts 

 of the district, and also at Steiglitz, associated with Oncograptus. 

 Ha,lf-a-mile south of this second Oncograptus locality, and appar- 

 ently on the same line of strike, fossils are to be found on the road 

 east of the Sanitary Depot. A small excavation was made here 

 and exposed beds that yielded D. caduceus, Oncograptus vpsilon 

 and Trigonograptus all in profusion. Further excavation would 

 probably yield a larger variety. The species of Trigonograptus 

 occurring in these beds is apparently not T. wilhinsoni, T. S. 



1 Proc. Roy. Soc. Victoria (ii.s.), vol. xx. (1907), quoted by Hall, T. S., A.A.A^S. (1909), p. 319. 



