GRAPTOLITES OF VICTORIA. 
lapping one-half to two-thirds of length ; inclined at about 25° ; apertural 
margins straight, normal to axis of branch ; in distal portion, about 8 in 
10 mm., in contact for a small fraction of length, apertural margins introverted. 
Remarks . — At first sight the inner branches seem to be 
given off in pairs, suggesting Ruedemann’s genus Syndyograptus 
(see Ruedemann, 13), but closer inspection shows that they 
arise serially. 
Fig. 4. Pterograptus lyricus, sp. nov. Polyparies bilaterally compressed. 
a. Proximal portion showing inner branches arising serially (No. 13755 Nat. 
Mus.). b. Proximal portion (No. 13756 Nat. Mus.). x4. Paratypes, Turner’s 
Quarry, 5 miles W. of Hastings. 
Associated graptolites. — Tetragr aptus cf. quadribrachiatus (J. Hall), Iso- 
graptus ovatus (T. S. Hall), Cryptographs tricornis (Carruthers) , Glossograptus 
hincksii (Hopkinson), Climacograptus riddellensis Harris, Diplograptus (Glypto- 
graptus) euglyphus (Lapworth). 
Horizon. — Lower Ordovician, Darriwil Series, Zone D1 (uppermost beds). 
Localities. — Holotype and paratypes, Turner's Quarry, Allot. 27B, Parish 
of Bittern, 5 miles west of Hastings (Mornington Peninsula) ; Sandy’s Creek, 
near confluence with Merrijig Creek, Tabberabbera (Gippsland) ; Howqua 
River, above Eight Mile Creek. 
Family DIPLOGRAPTIDAE Lapworth 1873. 
Genus CLIMACOGRAPTUS J. Hall 1865. 
Climacograptus uncinatus, sp. nov. 
(Plate XX, figs. 5a-5c.) 
Polypary widening from pointed proximal end to 2.5 mm. in 3 mm. and 
maintaining that width. Sicula obscure. Thecae 12 to 14 in 10 mm. Two 
f air ly stout curved spines, about 2.0 mm. long, arise about 2.0 mm. from 
proximal end. 
Remarks . — The only polyparies found exhibit scalariform or 
subscalariform aspects, probably because the curved spines in 
the proximal portion function as septal spines which prevent 
the polypary coming to rest except with the thecal apertures 
at right angles to the bedding. A subscalariform specimen 
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