73 
superstes, Egert. (Quart. Journ. Geol. Soc. XIY, p. 64, PI. 1), from the 
Keupcr, in England ; I gave a figure of this on Tl. 6, Eig. C, and it is again 
copied on PI. XXIX, Eig. 9. But I find that in Zittel’s “ Handbuch der 
Palseontologie” (1887, IAbtli. Ill Bd., 1 Lief., p. 203), this species is placed 
A\ it li Dictyopyge. I am not prepared to decide the question, hut I can add 
that, in the last (third) edition of Prof. Qucnstcdt’s “ Petrefaktenkundc ” 
(1885, PI. 25, Eig. 19), there is figured the tail of a fish, quite distinctly hete- 
rocercal, which is from the Lettcnkohle (Keupcr) of Bibersfeld (Germany.) 
There arc besides this the genera — Gyrolepis, Ag. ; Urolepis, Bell ; Oxygna- 
tlius, Egert. ; Cosmolepis, Ag. ; Thrissonotus, Ag. ; Centrolepis, Egert. ; 
Llssolcpis , Davis ; and Coccolepis , Ag. — all hctcroccrcal fishes, belonging 
to the order Palseoniscidae, and occurring in Mesozoic (Triassic to Upper 
J urassic) strata. 
Localities and Horizon. — P. antipodeus was found at Parramatta, in 
the Wianamatta Shales; also at Gosford, Brisbane Water, in the Ilawkesbury 
rocks (Mesozoic), New South Wales. 
Genus — MYRIOLEPIS, Eger ton, 1864. 
Myiliolepis Clarkei, Egerton. 
PI. XXX, Pig. 2. 
Mjriolcyis ClarJcei, Egerton, Joe. cit., pp. 2, 3, PI. I, £. 1. 
„ „ Peistmantel, 1878, loc. cit., p. 105. 
Obs. — Although no tail of this species is known, yet Sir P. de M. G. 
Egerton thought to be able to compare it with Acrolepis, Ag. Zittel (loc. 
cit., p. 195) quotes it also amongst the Ilctcrocerci, after Eygopterus, Ag. 
Sir P. de INI. G. Egerton himself wrote, “All evidence of the form of the tail 
is deficient.” 
Locality and Horizon. — In the Ilawkesbury beds, Cockatoo Island, 
Port Jackson (Mesozoic). 
Genus — U HOST HEXES, Dana, 1S49. 
(Geology, Wilkes’ United States Expl. Expedition, p. 681.) 
Urosthenes australis, Dana. 
PI. XXIX, Pig. 7. 
Urosthenes australis , Dana, 1849, loc. cit., p. 681. 
,, „ Peistmantel, 1878, loc. cit., p. 82. 
This is a large and powerful fish, with a distinctly heterocercal tail, 
which I reproduce from Dana’s original figure. 
llrt 104—89 L 
