173 
or tend to form a columella. The cardinal septum is long, extending quite 
to the centre of the calyx. Its position is indicated by the pinnate arrange¬ 
ment of the external costal striae. The alar septa are also well developed, 
hence the reference of this form to Aniso'phyllum, a genus which is elsewhere 
Devonian. 
Dimensions. —Diameter of calyx, 8mm. Length of corallum, 9mm. 
Occurrence. —A single silicified and otherwise well-preserved corallum 
in the Rush worth series. 
Sub-class ALCYONARIA. 
Genus Heliolites, Dana. 
Heliolites ixterstixcta., Linne sp., var. qippslandica, Chapman. 
(Plates XIII., Fig. 4; XIV., Figs. 10, 11.) 
Heliolites interstincta, L. sp., var. gippslandica, Chapman, 1914, Records 
Geol. Surv. Viet., vol. III., pt. 3, p. 311, pi. LX., figs. 35, 36. 
Observations.—There is no doubt that the Cooper’s Creek and Rushworth 
corals belonging to this genus are practically the same varietal form. Differ¬ 
ences in the condition of habitat will account for the coralla of the Rushworth 
examples being as a rule small, and more spreading or mushroom-shaped 
than the Gippsland, specimens. The autopores are often so close together 
as to almost exclude the coenenchymal portion, reducing the small siphono- 
pores bordering them to two or even one row. 
It is rather abundant in this collection ; coralla of medium size to small. 
Sub-class HEXACORALLA—TABULATA. 
Genus Favosites, Lamarck. 
Favosites QOTHLANDICA, Lamarck (Plate XIV., Fig. 12). 
Observations .—Small coralla, some hemispherical in form. Although 
these fossils from Rushworth are silicified, the mural pores can, in one 
specimen, be unmistakably seen ; they are double on each corallite face. 
The species is already known from the newer Silurian beds of Victoria, 
and it ranges into the Devonian, both here and in New South Wales. 
Genus Pachypora, Lindstrom. 
Pachypora alterivalis. Chapman (Plates XIII., Fig. 5; XV., Figs. 13, 14, 15, 16). 
Pachypora alterivalis, Chapman, 1914, Records Geol. Surv. Viet., vol. 
III., pt. 8, p. 309, pi. LVII., figs. 28, 29. 
Observations. —Several small branches and basal fragments of this coral 
are present amongst the Rushworth fossils. 
The original examples came from the Silurian (Yeringian) of Deep Creek, 
Thompson River, Gippsland. The length of the largest branches measures 
2 cm., equal to the described specimen above mentioned. The basal portion 
of the corallum shows the coral to have the habit of growth of the Silurian 
species, P. lamellicornis, Lindstrom^, whilst in its cylindrical branching 
habit in its later stages, it resembles the Devonian P. cervicornis, de Blain- 
ville sp.2, and the Silurian P. cristata, E. and H. sp.^ 
* Pachypora lamellicornis, Lindstrom, 1873, Xagra anteckningar om Anthozoa Tabulata. Ofversigt 
af Kongl. Vetensk. Akad. Forhandl. Nicholson and Etheridge, jnr., 1878, Journ. Linn. Soc. Zooi. Vol. 
XIII. p. 361, pi. XX. figs. 15-17. Nicholson, 1879, “ On the Structure and Affinities of the Tabulate 
Corals of the Palaeozoic Period,” p. 80, pi. IV. figs. 2-2c. 
* Alveolites cervicornis, De Blainville, 1830, Diet. Sci Nat., t. LX., p. 369. Pachypora cervicornis, De 
Blainv. sp., Nicholson, 1879, Op. supra cit. p. 82, pi. IV. figs. 3-Zd. 
® Favosites cristata, M. Edwards and Haime, 1851, Pal. Foss. des. Terr. Pal. p. 342. Id., 1854, Brit. 
Foss. Corals (Pal. Soc. Mon.) p. 260 pp LXI., figs. 3, 4. Pachypora cristata. M. Edw. and H. sp. Nicholson, 
1879, op. cit. p. 87, pi. IV. figs. 4-46 ; pi. V., figs. 1-16. 
