Victorian Gruptolites. 117 



tion ut' the (luairy would support this vieAv. The only other 

 graptolite un the present slab besides Triaemograptus is a very 

 indistinct example of apparently Didymograptus extensus. 



Locality. — Barker's Creek Slate Quarry, North Castlemaine. 

 Mr. W. J. Harris has found a couple of examples in badly cleaved 

 slate from about the middle of the Castlemaine series, and to the 

 south of the town. I have a few fragments, which long puzzled me 

 from similar horizons in the same district, which I am now able to 

 recognise as this species. 



Horizon. — Middle and Upper Castlemaine series, but exact posi- 

 tion not vet definitelv known. 



EXPLANATION OF PLATES. 

 Plate XVIL 



Fig. L — Didymograptus extensus J. Hall. Burn's Reef, Castle- 

 maine. 



Fig. 2. — Didymograptus perditus n.sp. Daphne Reef, Lost Gully 

 Chewton. (Type.) 



Fig. 3. — Didymograptus gracilis Tornquist. Bendigo. 



Fig. 4. — Didymograptus aureus n.sp. Bendigo. (Type.) 



Fig. 5. — Didymograptus latens n.sp. Diamond Hill, Bendigo. 

 (Type.) 



Fig. 6. — Didymograptus procumhetis n.sp. Diamond Hill, Ben- 

 digo. (Type.) 



Fig. 7. — Didymograptus procumhens n.sp. Diamond Hill, Ben- 

 digo. (Co-type.) 



Fig. 8. — Didymograptvs admanantivus n.sp. Diamond Hill, Ben- 

 digo. (Type.) 



Fig. 9. — Didymograptus mitndus n.sp. Bendigo. (Type.) 



Fig. 10. — Didymograptus dilatans n.sp. Daylesford (Sailors' 

 Creek). T. S. Hart. (Type.) 



Fig. U.— Didymograptus hifidus J. Hall. Wattle Gully, Castle- 

 maine. 



Fig. 12. — Didymograptus caduceus var. mauuhriatus var. nov. 

 West of Macedon. (Type.) 



Fig. 13. — Didymograptus caduceus var. manuhriatus var. nov. 

 Macphers^pn's Creek, Steiglitz District. (Co-type.) 



Fig. 14. — Oncograptus upsilon n. gen. et n.sp. Frederick the Great 

 Mine, Sebastian. (Type.) 



