DEVONIAN FOSSILS 107 
at Kilsyth (for locality see Chapman, 1907), at Killara 
(Syme’s Homestead—for locality see Gill, 1945b), and now 
in Gippsland. It appears to be strictly limited to beds of 
offshore facies. This is true also of New Zealand, where it 
occurs in the Lower Devonian beds of Bohemian (offshore) 
facies on the Baton River, but is not recorded from the con- 
temporaneous beds of Rhenish (inshore) facies near Reefton. 
Genus CHONETES Fischer, 1837 
Chonetes baragwanathi sp. nov. 
Pl. III, Figs. 10, 14, 16, 20, 23. 
Type Material. Holotype consisting of the steinkern of a 
ventral valve on specimen 27,219 from locality G23. Paratype 
consisting of the steinkern (specimen 27,214B) and an external 
mould (27,214A) of a dorsal valve from locality G 23. 
Description of Holotype. Ventral valve sub-semicircular, 
strongly convex but also crushed a little anterior-posteriorly, thus 
shortening its natural length and exaggerating its natural con- 
vexity. Greatest width of shell 3 em., greatest length (measured 
in one plane) 1-2 em., and length following profile 2-1 cm. Shal- 
low median fold as in Chonetes robusta. Hingeline straight and 
slightly less than greatest width of shell. Interarea smooth, 
narrow—about 0-5 mm. Along the cardinal margin are the 
stumps of strong spines set at right angles to the hingeline. There 
are indubitably three on each side of the umbo, and their positions 
suggest that there were five on each side. Beak inconspicuous. 
Thin and relatively high median septum extending to a point 3-5 
mm. from the umbo, after which there is a continuation in the 
form of a very slight rise on the floor of the shell as far as 6 mm. 
from the umbo. The septum is merged with the palintrope pos- 
teriorly and ends abruptly anteriorly except for the linear in- 
cipient septum already mentioned. During cleaning, the steinkern 
broke away a little on the right side of the septum, but there is 
still clearly shown on the other side a small narrow platform, i.e., 
an excavation in the original shell, widening anteriorly and merg- 
ing into the general floor of the shell where the main septum ends. 
Outside this platform on each side is a marked depression in the 
steinkern (raised, portion in the original shell), outside of which 
again is a corresponding raised portion (depression in shell). 
