272 
a Moiiograptus , while the dorsal thickening is plate-like as it penetrates 
the rock perpendicularly to the bedding. It is then not a virgula such 
as is present in Monograptid\ce. The specimen is very indistinct, but 
I feel fairly sure that it represents a Dicranograptid , and is, therefore, 
indicative of Upper Ordovician age. 
Nos. 596 and 612 are Diplograptus ]r sp. cf. murchisoni. Nos. 593, 
595, 597, 600, 605, 606. 607, 608 are Diplograptus spp. Nos. 596, 597, 
598 (?), 603. and 613 (?), are Climacograptus spp. Nos. 594, 599, 602, 
604, 609, 610, and 614 are indeterminate. 
The presence of the genera Diplograptus and Climacograptus alone is 
not sufficient to fix the age definitely. But it might be either Lower 
Silurian or Upper Ordovician. The probable presence of a Dicranograptid 
and of a Diplograptus , which might be D. murchisoni, both point to Upper 
Ordovician, and I have but small doubts that is really the age of the beds. 
It may be put on record that the slabs are in places fairly crowded with 
specimens, so that hundreds must be present in the collection, but there 
is no sign of a Moiiograptus , or of any compound! form other than the 
nearly straight flexuous fragment identified as a Dicranograptid. The 
specimens are all much distorted by cleavage, which is parallel to the 
bedding and well developed. 
University, Melbourne, June 26, 1905. 
From Bendigo. 
(Nos. 615-667. Collected 1 by Mr. H. S. Whitelaw). 
From the Concord Company's lease. 
(Nos. 615-636A). 
Didymograptus, sp. indet. ; No. 626. 
Tetragraptus serra, Brong. (?); No. 628 (badly preserved). 
Tetragraptus fruticosus, J. Hall;. Three-branched form—Nos. 615, 
616, 619, 624, 625, 626, 633, 634; four-branched form—No. 633; 
doubtful form—-Nos. 622, 628, 629, 630. 631, 636. 
Phyllograptus typus, J. Hall. Nos. 617, 621, 622, 625, 629, 631, 
632 (?)■ 
Indeterminate; Nos. 618, 620, 623, 627, 635, 6364. 
Of the three species identified, T. fruticosus is confined to the Bendigo 
series, and is its typical fossil. Tetragraptus serra and Phyllograptus 
typus both pass up into the Castlemaine series. 
From between LanselVs 180 mine and the Victoria Reef mine. 
(Nos. 637-644). 
T etragraptus fruticosus, J. Half. Three-branched form—Nos. 637, 
639, 640, 641, 642, 643, 644; four-branched form—No. 641. 
Tetragraptus pendens. Elies; No. 638. 
Dichograptus octobrachiatus, J. Flail; Nos. 639, 642, 644 (in all 
9 or 10 examples). 
Goniograptus, sp. indet. ; No. 642. 
Phyllograptus, sp. indet. ; No. 642. 
Dichograptus octobrac hiatus seems commoner than at most Bendigo 
localities. 
