Tertiary. } PALZONTOLOGY OF VICTORIA. [Protozoa and Zoophyta. 
these species are nearly identical with each other and with our 
fossil. 
Not uncommon in the cream-colored Miocene Tertiary strata of 
Boggy Creek, near Sale, Gippsland. 
EXPLANATION OF FIGURES. 
Plate XLVIII.—Fig. 1, specimen, natural size. Fig. 1a, bundle of silicious spicules, mag- 
nified, showing that the puinted terminations are at different distances from the base. Fig. 16, 
most perfect portion of spicule observed, magnified to show the slender fusiform shape. Fig. le, 
fragment of spicule more highly magnified, showing the appearance with transmitted light under 
the microscope of the translucent thick hollow tube. Fig. 1d, portion of ditto, viewed by 
reflected light, showing the external surface and internal tubular hollow. 
Pirate XLVIIL., Fias. 2, 3, 4 
GRAPHULARIA ROBIN (McCoy). 
[Genus GRAPHULARIA (Mit. Epw, anp Hare). (Sub-kingd. Radiata, Class Zoophyta. 
Order Zoophytaria. Fam, Pennatulide.) 
Gen. Char.—Calcareous axis very long, straight, tapering towards each end, tapering more 
rapidly towards the conoidal lower extremity, of which the transverse section is circular ; more 
gradually tapering towards the upper portion, the section of which is tetrahedral with one of the 
sides, forming a broad shallow furrow, the other three sides being less concave. Transverse 
section showing a thin dense external coating, with a fine sub-crystalline internal structure 
radiating from the centre, and crossed occasionally by concentric lines of growth. ] 
DescripTion.—Corallum straight, conically tapering rather rapidly to a point 
and with a circular section for lower 2 inches of the length, beyond which the 
section becomes gradually tetrahedral, the four angles forming narrow rounded ridges 
increasing in prominence and defining an irregular depressed flattened or concave 
side between each pair; hard dense superficial layer marked on surface with 
irregular longitudinal short impressed strive under the lens; inner portions radiat- 
ingly fibrous perpendicularly to the surface. Length unknown (upwards of 1 foot), 
usual diameter of quadrate portion rather less than 4 inch; circular lower portion 
tapering to a point in 2 inches from a diameter of 5 lines, at an angle of about 10°. 
There is a large fleshy sea-pen living in Hobson’s Bay, Sarcop- 
tilus grandis (Gray), the hard internal calcareous axis of which 
is a perfect miniature of our fossil in all the more important respects ; 
it has the same hard surface, minutely streaked with longitudinal 
interrupted striz, a strongly radiated transverse internal structure 
and one end circular in section, gradually passing into a quadrangular 
section with increasingly prominent longitudinal, rounded, ridge- 
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