On a Dental peculiarity of the Lepidosteide. — 
By W. J. Barxas, L.R.C.P.L., M.B.CS.E. 
[Read before the Royal Society of N.S.W., 5 December, 1877.) 
T am induced to make some remerks on this family.of fossil fishes, 
as I have noticed in the twentieth volume of the Quarterly Jou 
of the Geological Society of England a brief notice ot some fossi 
a ; 
forwarded to England for examination. The author of the paper 
stated, “that after the closest scrutiny I have been unable 
ongs as is stated to the specimen) is a true heterocercal form 
diudistingaishatle from that of Palxoniscus. The position of the 
dorsal fin, although not a feature of generic importance unasso- 
ined pe siete lepis), one i indistnguishablo. from om inde mempense te 
io of t 
Eepidonte Weide named :—Palzoniscus, ee ed Aarslagta, so 
if Urosthenes and Myriolepis are truly allies of Pygopterus and 
oo respectively, we have, then, three genera, Palzoniscus, 
Seger and Myriolepis, representing this fami ly that have 
ined from the coal strata of the Colony of N ew South 
