GRAPTOLITBS OP VICTORIA. 
tubular ; apertures open obliquely downwards and outwards ; overlap one-half 
of length ; submucronate. 
Fig. 5. Cryptograptus circinus, sp. nov. Proximal end (No. 22913, syn- 
type). x3. 
Remarks. — C. circinus differs from C. tricornis Carruthers in 
its greater width, in its less widely spaced thecae, and in thecal 
characters (see Elies and Wood 4). Thecae opening obliquely 
downwards and outwards indicate retroversion ; it is, however, 
difficult to trace the walls of the thecae into the body of the 
polypary. Some specimens show torsion (PI. XXI, fig. 3d ) ; the 
aspects of the polypary are not as varied as in C. tricornis, 
bilateral aspect being common and suggesting that the cross 
section of the polypary is not so concavo-convex as it is in 
C. tricornis. 
Associated, graptolites. — As with Didymograptus acri cuius. 
Horizon. — Lower Ordovician, Darriwil Series, Zone Dl. 
Locality. — Common at Bendigo East in outcrops of strata of the Darriwil 
Series. 
Polypary 12 cm. or more in length, widening proximally to 2.0 mm. in the 
first few centimetres and maintaining that width throughout. Sicula furnished 
with spines. Polypary consists of a series of superimposed rhombic areas 
Fig. 6. Retiograptus pulcherrimus, sp. nov. Portion of polypary, repro- 
duced from photograph, showing consecutive pairs of rhombs and alternating 
thecae. (No. 26700 [1], holotype). x5. 
Genus RETIOGRAPTUS J. Hall 1865. 
Retiograptus pulcherrimus, sp. nov. 
(Plate XXII, figs. 1 and text fig. 6.) 
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