450 T. 8. Ball — Graptolite Bocks. Victoria, Australia. 



In the above description I have regarded the secondary branches 

 as giving off tertiaries on alternate sides, instead of treating it as 

 a case of dichotomy, that is, I look at it as showing what botanists 

 term sympodial branching. In this I follow the view of McCoy 

 in his description of the type species, Gornograptus Tliureaui. In 

 a simple species, such as the present, the distinction may appear 

 trivial, but in the type species, and still more so in an undescribed 

 member of the genus in the National Museum, Melbourne, simplicity 

 is certainly gained by this manner of considering the branching. 

 A similar mode of branching occurs, of course, in Thnmnograptus. 



Locality and Horizon. — It occurs throughout the Bendigo and in 

 the lower members of the Castlemaine Series. In the former it is 

 associated with the stouter and much more copiously branched 

 G. Thureaui, which is confined to these beds. 



(Eeduced to one-fourth nat. size.) 



Fig. 9. — Goniograptus macer, n.sp. 

 ,, 10. — The same, thecae enlarged. 

 „ 13. — Trigonograptus Wilkmsoni, n.sp. 



Bryograptus Victorice, T. S. Hall. (PI. XXII, Figs. 11, 12.) 



This species is fairly common at Lancefield, and indistinct 

 specimens, with more branches developed than I have figured, 

 occur, but I have shown a well-preserved form. It occurs on the 

 same slabs with the Leptograptus figured above, as well as with 

 most, if not all, of the species recorded from that locality iu 

 this paper. 



Trigonograptus WiUcinsoni, n.sp. (Illustration supra. Fig. 13.) 



Hydi'osome straight, parallel-sided, gently curving to a blunt 

 point at the distal end. Thecai inclined at about 30°, gently 

 curving outwards to the margin of the polypary, which they do 

 not indent ; about six and a half in 10 mm., opposite to one another, 

 Virgula very distinct, straight, not traceable quite to the distal 

 extremity. Breadth of hydrosonie nearly 3 mm., greatest observed 

 length (broken) 4 cm. 



The species seems very distinct from those already described by 

 the small number of thecse in a given length. In general form it 



