6 
ACTIXOPTEKYGII. 
tin; dorsal and anal fins arising almost directly opposite to each 
other, nearly equal in size, and the latter well separated from the 
caudal. [Scales not satisfactorily known, but apparently serrated.] 
Form. Sf Loc. Upper Keuper : Coburg. 
P. 7395. Large slab of sandstone, with remains of several indi¬ 
viduals ; Coburg. Purchased . 
P. 3488. Smaller slab with three specimens in an imperfect state of 
preservation ; Coburg. Enniskillen Coll. 
Dictyopyge catoptera (Agassiz). 
1835. Palcsoniscus catopterus, L. Agassiz, Edinb. Phil. Journ. vol. xix. 
p. 388. 
1836. Palcsoniscus catopterus , It. I. Murchison, Proc. Geol. Soc. vol. ii. 
p. 206. 
1844. Palcsoniscus catopterus , L. Agassiz, Poiss. Foss. vol. ii. pt. i. 
p. 303 (name only). 
1850. Palcsoniscus catopterus, W. King, Permian Foss. (Mon. Pal. Soc.) 
p. 226. 
1850. Palcsoniscus catopterus , Sir P. Egerton, Quart. Journ, Geol. Soc. 
vol. vi. p. 4. 
1858. Palcsoniscus catopterus, Sir P. Egerton, ibid. vol. xiv. p, 165, 
pi. xi. fig. 4. 
1877. Dictyopyge catoptera, R. H. Traquair, ibid. vol. xxxiii. p. 567. | 
Type. Imperfect fishes ; British Museum and Museum of Prac¬ 
tical Geology. 
A small species, attaining a length of about 0*07. Length of 
head with opercular apparatus at least equalling the maximum 
depth of the trunk and contained about five times in the total 
length of the fish; depth of caudal pedicle at least half that of the 
abdominal region. Pelvic fins arising midway between the pectoral 
arch and the anal fin ; dorsal fin arising considerably in advance of 
the anal, and apparently nearly as large as the latter. Scales not 
satisfactorily known, but probably smooth and without serrations ; 
many of those of the flank somewhat deeper than broad. [Harrow 
ventral scales not hitherto observed.] 
Form. Sf Loc. Keuper: Tyrone, Ireland. 
P. 1033. Two small slabs of red sandstone, each with two imperfect 
fishes ; Roan Hill, Tyrone. Egerton Coll. 
P. 3489-91. A large slab and four smaller pieces of similar sand¬ 
stone with numerous specimens, one labelled by Agassiz; 
Roan Hill, Tyrone. Enniskillen Coll 
