GRAPTOLITES OF VICTORIA. 
length observed is 3.0 cm. ; it widens from about 1.0 mm. in 
the proximal portion to 2.0 mm. within 4.5 mm. and has, 
therefore, a robustness suggestive of D. (G.) teretiusculus. The 
virgella is fine and short, like that of the American forms of 
D. (G.) euglyphus described by Ruedemann (13). No basal 
spines have been detected. The thecae are sacculate above 
and impressed below, 2.5 mm. long, overlap about one-half, 
and have undulate apertural margins. Thecae 11 to 12 in 
10 mm. in proximal part, and 9 to 10 in 10 mm. in distal part 
of polypary. Until we have examined a wider range of material 
we prefer to regard this form as D. (G.) euglyphus. 
Associated graptolites . — Graptolitos associated with this form are typical of 
the Gisborne Series (Upper Ordovician) or of Zone Dl , Darriwil Series (Lower 
Ordovician) . 
Horizon . — Lower Ordovician, Darriwil Series, Zone Dl ; and Upper Ordovi- 
cian, Gisborne Series. 
Localities . — One Mile Creek, Enoch’s Point, Goulburn River ; Howqua 
River above Eight Mile Creek ; Geological Survey Locality, Ba67, Quarter 
Sheet 6 S.E., at the junction of Riddell’s and Jackson’s Creeks, near Gisborne ; 
Bendigo East, on the Bendigo-Axedale Road, about 30 chains east of the 
Whitelaw Fault ; Turner’s Quarry, Allot. 27B, Parish of Bittern, Mornington 
Peninsula. 
Diplograptus ( Glyptograptus ) euglyphus Lapworth 
var. sepositus nov. 
(Plate XXI, figs. 2a-2e.) 
Polypary 21 mm. in length ; widening from 0.7 near sicula to about 1.8 mm. 
in 6 mm. and then of uniform width to distal extremity. Sicula about 0.6 mm. 
long ; furnished with short, fine virgella and curved spine. Thecae 8 to 10 in 
10 mm., similar to those of D. (G.) euglyphus. 
Remarks . — All our specimens have a subscalariform aspect 
but vary considerably in appearance with slight variation in 
the angle of compression. Some modes of preservation suggest 
introversion in the apertural region. In some polyparies the 
first thecae have grown to an abnormal size. The development 
of the first thecae is obscure, but Th. I 1 seems to originate near 
the aperture of the sicula and turns quickly, growing outwards ; 
it is furnished with a small apertural spine. Th.l 2 grows 
outwards and upwards. 
D. (G.) euglyphus var. sepositus has much in common with 
the form described by Elies and Wood (3) as D. teretiusculus 
var. euglyphus and that relegated by Ruedemann (13) to 
D. euglyphus, more with the latter than with the former. It 
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