182 
Mitta Mitta River. Nos. 2698-2718. Field No. 125. Plan 5. 
Limestones with thin argillaceous bands, and showing much shearing 
in places. 
Regd. No. 
(Slice No. in parentheses.) 
» 
Fossils, with Remarks. 
2698 (1390, 1390a) .. 
This sheared coral limestone is seen in thin section to contain 
the carapaces of ostracoda and coralla of Halysites orth- 
opteroides, Eth. fil. (See Appendix.) 
2699 
Halyites orthopteroides seen on smoothed and weathered 
surface of rock. 
2700 (1391, 1392, 1393) 
In thin sections, Halysites of. orihopteroides{\‘i^\—^ee Appendix 
and pi. XXV.; pi. XXVI., fig. 24) ; H. pycyioblastoides (1392 
—Appendix and pi. XXVI., fig. 25); and ostracoda (1393 
—Appendix and pi. XXXI., fig. 34). 
2701 
Heliolites sp. and other corals, indet. 
2702, 2703, 2704 
Corals indet, without slicing. 
2705 (1394,1395) 
In thin section, a sheared limestone with indeterminate corals 
and ostracoda (pi. XXXI., fig. 35). 
2706 
Try plasma sp. and Heliolites sp. 
2707 
Heliolites sp. and Halysites sp. 
2708 
‘iCyathophyllum (longitudinal fracture through cortex of large 
corallite). 
2709 
Sheared corals, indet. 
2710 
Heliolites sp. 
2711 
IFavosites; iHeliolites. 
1712-4, 2717 
Corals indet., without slicing. 
2715 (1396) .. 
In thin section the rock is seen to contain ostracods ; a rugose 
coral, indet. ; Halysites sp. ; and crinoid remains. 
2716(1765, 1765 bis.) .. 
These slices show the rock specimen to contain portion of a 
well-preserved corallum of Favosites gothlandica, Lam. 
2718 (1766) .. 
In thin section, showing numerous ostracoda. 
Age.—Silurian (Yeringian). 
APPENDIX ON THE FOSSILS. 
PLANT.dE. Class ALGM. 
Genus Sphaerococodium, Rothpletz. 
SPH.EROCODIIJM GiPPSLANDicTJM, sp. nov. (Plate XVI., Pig. 1). 
Description .—Thallus forming fungiform pellets, consisting of fasci¬ 
culated masses of radiating, dichotomously branched, single-celled filaments. 
Cells ovoid or short cylindrical, measuring about '15 mm. in diameter. The 
figured pellet measures about 5 mm. in diameter. 
Relationships. —The cells of the related species S. gotlandicum'^ and 
S. hornemanni^ are much smaller, having a breadth of * *02 to *025 mm. 
The former came from the Silurian of Gotland, the latter from the St. Cassian 
beds of South Tyrol (Upper Alpine Trias). 
Occurrence .—In compact blue limestone associated with Diphyphyllum 
robustwn, of Middle Devonian age. Junction of Wombat Creek and the 
Mitta Mitta River, Gippsland. (Nos. 2562, 2564, 2565.) 
^ Rothpletz. Ueber Algen iind Hydrozoen im Siluri von Gotland und Oesel. Kongl. Svensk 
Vetensk. Akad. Handl., vol. XLIII., No. 5, 1908. p. 7, pi. I., figs. 5, 6 ; pi. II., figs. 1-4. 
* Op. supra cit., p. 7, pi. I., figs. 2-4. 
