QRARTOLITES OF VICTORIA. 
Remarks . — The sicula is less than 1.0 mm. long and the first 
theca originates near its aperture. Some branches up to 6 mm. 
in length have all thecae of the distal type. D. acriculus 
appears to have some thecal characters in common with D. euodus 
Lapw., see Elies and Wood (1), but it differs from Lapworth’s 
species in the absence of proximal curvature of its branches 
and in its rapidly increasing and greater distal width. 
Associated graplolites. Tetragraplus cf. quadribrachiatus (J. Hall), Isc- 
graptus forcipiformis (Rued.), / Hdymograptu s nodosus Harris, Cryptograptus 
tricorms var. schafen Lapworth, Di plograptus cf. coelatus Lapworth, Glosso- 
graptus pilosus sp. nov., Lasiograptus sp., Cardiograptus crawfordi Harris, 
Phyllograptus nobihs Harris & Keble, Trigonograptus sp., Brachiograptus 
etaformis H and K., Atograptus woodwardi Harris, and other, as yet undescribed, 
species. 
Horizon . — Lower Ordovician, Darriwil Series, Zone Dl. 
Locality, -Bendigo East, on south side of Bendigo-Axedale Road, about 
30 chains east of the Whitelaw Fault. 
Didymograptus mendicus, sp. nov. 
(Plate XX, fig. 2.) 
Branches arising suborally ; abruptly curved for first half of thecae l 1 
and l 2 , then very slightly curved and lying within an angle of 70°. Minimum 
width near sicula under 0.2 mm. ; maximum width distally 1.5 mm. ; maxi- 
mum length over 1 mm. 
Sicula less than l mm. long and relatively broad. Thecae 12 or 13 in 
10 mm. ; about as long as broad (except l 1 and l 2 ) ; free for three-fourths 
length ; apertural margins undulate, approximately 105° to axis of branch ; 
ventral margins slightly concave, inclined between 40° and 45° ; broadly 
submucronate. Thecae l 1 and l 2 twice as long as broad ; proximal half from 
near origin slightly over 0.1 mm. wide with concentrically curved sides ; distal 
half rapidly widening to 1.4 mm. at aperture. 
Remarks. — The first thecae are about 2.0 mm. long, the 
succeeding thecae 1.5 mm. ; an unusual feature. The curvature 
giving the polypary its dependent form is confined to the narrow 
half of the first thecae. Later thecae are characteristically 
broad and have an unusually small overlap in proportion to 
their breadth. 'Hie angle of the aperture varies considerably 
with the mode of preservation, and in the right hand branch 
of the holotypc (PI. XX, fig. 2), appears to be considerably more 
than 105°. The mode of origin of the first thecae is suggestive 
of the Leptograptidae ; we have not yet obtained a specimen 
showing the reverse aspect, but we suspect that a rudimentary 
double crossing canal is present. 
D. mendicus belongs to the D. bidens group ; D. bidens, 
a New Zealand form recently described by Keble (11), is the 
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