484 
ACTINOPTERYGII. 
1850- Pcilceoniscus macrophthalmus, Sir P. Egerton, in King’s Permian 
Foss. (Palseont. Soc.), p. 225, pi. xxii. fig. 2. 
1855. Pcilceoniscus macrophthalmus, F. M‘Coy, Brit. Paleeoz. Foss, 
p. 607. 
1861. Palceoniscus macrophthalmus, H. B. Geinitz, Dyas, p. 17, pi. vii. 
fig. 3. 
Type. Nearly complete fish ; Geological Society of London. 
A small species, attaining a maximum length of about 0*12; or 
possibly a young stage merely of P. freieslebeni. Trunk robust, the 
greatest depth contained about six times in the total length ; bead 
and opercular apparatus large, occupying somewhat less than one 
fourth of the total length ; orbit relatively large. Fins as in P. 
freieslebeni. Scales small and feebly ornamented. 
Form. Log. Upper Permian (Marl Slate) : Northumberland 
and Durham. Upper Permian (Kupferschiefer): Hesse. 
& 
28613 d. Two large specimens, one showing the fins, the other coiled 
up; Marl Slate, Durham. Purchased, 1853. 
35736-37. Two small specimens, one wanting the head ; Marl Slate, 
Ferry Hill, Durham. Purchased , 1860. 
P. 1025. A large fish, chiefly in impression, labelled as a young 
individual of P. comtas by Agassiz ; Ferry Hill. 
Egerton Coll . 
P. 3484. Imperfect remains of large individual; Marl Slate, Mid¬ 
deridge, Durham. Enniskillen Coll. 
P. 354. Crushed specimen with relatively larger scales ; Marl Slate, 
probably from Cullercoats, Northumberland. 
Purchased, 1881. 
P. 5139. Small individual, apparently elongated by pressure; Cul¬ 
lercoats. Presented by William Dinning, Esq., 1886. 
Small forms of Palceoniscus from the German Kupferschiefer, 
apparently indeterminable immature individuals, are named Palceo¬ 
niscus pygmceus (H. von Meyer, Neues Jahrb. 1848, p. 467, name 
only). The following specimens are of this character :—- 
* 
P. 3476-7. Remains of head and trunk, about 0’055 in length, and 
an imperfect trunk ; Riechelsdorf, Hesse. These specimens 
were doubtless intended to be the types of P. pygmceus. 
Enniskillen Coll. 
P. 1016. Caudal region of equally small fish; Riechelsdorf. 
Egerton Coll. 
