186 
Fam. Favositid^ 
Genus Favosites, Lamarck, 
Favosites gotiilandica, Lamarck (Plates XX., Fig. 10; XXL, Figs. 12-14 ; XXIIL 
Figs. 18, 19). 
Favosites gotiilandica, Lamarck, Etheridge, jun., 1899. Fee. Geol. Surv. 
New South Wales, vol. VI., pt. 3, p. 162, pis. XXII. and XXIIL 
Observations. —-The coralla of this well-known form are frequent in the 
Silurian portion of this series of rocks from the Limestone Creek District 
The corallites compare closely in size with the measurements given by Dr. 
H. A. Nicholson in his “Tabulate Corals,” 1879, p. 46. The coralla when 
complete are seen to be roundly conical, that is, the point of attachment is 
blunt and the growing surface spheroidal. In specimen 2091 the roughly 
fractured corallum shows the vertical rows of corallites with their uniserial 
mural pores in relief. In specimen 2127, which by the way is well preserved, 
th^ vertical slice shows the coral to have been fractured by minute thrusts 
which have displaced the vertical walls by three stages of *25 mm. each. 
No. 2130 is a conical-shaped corallum. The weathered surface shows the 
spacing and arrangement of the tabulae very distinctly. A curious point 
in regard to the spacing of the tabulae was noticed here, namely, where the 
corallites are vertical the tabulae are normal and regular, and where they 
recurve the tabulae tend to become rapidly numerous and even crowded 
together, as in some flattened Devonian forms like F. multitahulata. Thus 
even the manner of spacing of the loculi cannot be relied upon as an entirely 
safe factor for specific determination. No. 2542, from the Gibbo River, 
Benambra, shows the corallum to have been invaded by a boring fungus, the 
hyphae of which have subsequently been differentially stained by limonite. 
This staining has evidently taken place synchronously with, or subsequently 
to, the joint-fracturing of the limestone, since the corals in the rock are filled 
with the same material. 
Occurrence. —Limestone Creek series: Native Dog Creek (Nos. 2076, 
2086, 2090, and 2091). Cowombat Creek (Nos. 2127, 2130, 2131, &c.). 
Mitta Mitta River series : Gibbo River, Benambra (No. 2542). 
Age.—Silurian (Yeringian). 
Favosites forbesi, Edwards and Haime (Plate XXIL, Figs. 16, 17). 
Favosites forbesi, Edwards and Haime, 1855, Mon. Brit. Foss. Corals (Pal. 
Soc. Mon.), p. 258, pi. LX., figs. 2, 2a-^. Chapman, 1914, Rec. Geol. Surv. 
Viet., vol. III., pt. 3, p. 308, pi. LIIL, fig. 9 ; pi. LVI., fig. 27. 
Observations .—-The specimens from the Mitta Mitta River District (Gibbo 
River), referred to the above species, are irregular in the growth of the corallum. 
One is a massive form (No. 2540), approaching the Silurian example described 
by Prof. Nicholson. Another example (No 2541) has smaller calices, and the 
corallum is abruptly truncated on the summit by a deposit of calcareous 
mud with crinoid remains. The dwarfing of the coral may have ensued 
from the beclouding of the water in which they lived, by the sediment, and 
which may have finally Idlled it. 
Occurrence.—Cowombat Creek (Nos. 2135, 2136). Gibbo River (Nos. 
2540, 2541). Mitta Mitta River (No. 2545). Wombat Creek (No. 2661). 
Age.—-Silurian (Yeringian). 
