MANSFIELD DISTRICT, VICTORIA. 
of a plate, which must have been about three times as long as 
broad, with sharply rounded ends and a feebly crimped or folded 
edge. The original of fig. 3 is an imperfect ferruginous fossil, 
evidently incomplete at one end and at one lateral margin. A 
third specimen shows the actual spongy tissue of the bony plate, 
with indications of an irregular tubercular ornament on the outer 
face. It seems likely that these specimens were misinterpreted 
by McCoy, and were intended for description under the name of 
Pteraspis ? mansfieldensis (loc. cit., p. 24). 
Appendicular Skeleton.—In addition to the Rhizodont frag- 
ments just described, there is a typical small clavicle, bearing an 
external ornament of radiating ruge and tubercles. There are 
also three stout, hour-glass-shaped internal bones, exactly resem- 
bling the basal supports of the paired, dorsal, and anal fins in the 
Rhizodonts and their allies. 
Order Actinopterygii. 
Family PALAONISCIDA. 
Genus ELonitcurHys, Giebel. 
[Fauna der Vorwelt, Fische, 1848, p. 249. | 
Syn. Cosmolepides, F. McCoy, loc. cit., 1890, p. 24 (name only). 
All the remains of Palzeoniscidae from Mansfield appear to 
belong to this genus, which is found both in Europe and North 
America, and ranges from the Lower Carboniferous to the Lower 
Permian. 
ELONICHTHYS SWEETI, sp. nov. Plate IX, figs. 1-3; Plate <3 
1890. Cosmolepides sweeti, F. McCoy, loc. cit., p. 24 (name only). 
Type.—Imperfect fish, the greater portion of the trunk in 
counterpart (Pl. IX, fig. 1; Pl. X, fig. 1). 
Specific Characters.—A slender species attaining a length of 
at least 0.3 m., probably sometimes larger. Length of head with 
[19] aC 
