326 
ACTINOPTEKTGII. 
species from an Upper Tertiary deposit near Sofia, Bulgaria, are 
named Silurus serdicensis by F. Tonla, Denkscbr. k. Akad. Wiss., 
math.-naturw. Cl. vol. Iv. (1889), pt. ii. p. 108, pk ix. 
The following specifically undetermined specimens probably belong 
to this genus 
16402 e, 16403 a. Anterior end of snout and an abraded smaller 
skull, erroneously referred by Lydekker to young indi¬ 
viduals of Bagarius yarrelU in Palseont. Indica, ser. x. 
vol. iii. (1886), p. 255; Lower Pliocene, Siwalik Hills, 
India. 
Presented hy Col. Sir Proby T. Caxdley^ K.C.B.., 1842. 
Genus PSEUDEUTROPIUS, Sleeker. 
[Nederl. Tijdschr. Dierk. vol. i, 1863, p. 106.] 
Head almost or completely covered with soft skin; gape of mouth 
not extending backwards to the orbit, which is large; teeth minute 
and villiform, some on the vomer and palatines. Pectoral fin with 
robust spine, serrated on the posterior or both borders : pelvic fin 
with six rays; dorsal fin short-based, with a robust spine, more or 
less directly opposed to the pelvic pair; a very small adipose dorsal 
fifi ; anal fin much extended, terminating at some distance from the 
caudal, which is forked. Skin naked. 
Surviving species in the East Indies. 
Pseudeutropius verbeeki, Giinther. 
1876. Bi'achyspondylus indicns, W. von der Marck, Palaeontogr, 
vol. xxiii. p. 412, pi. xxiv. fig. 2. [Imperfect fish; Royal Geo¬ 
logical Museum, Dresden.] 
1876. Pseudeutropius verheehii, A. Gunther, Geol. Mag. [2] vol. iii, 
p. 435, pi. XV. fig. 2. 
Type. Imperfect fish ; British Museum. 
A species attaining a length of about 0‘6. Length of head with 
opercular apparatus slightly less than half that of the trunk from 
the pectoral arch to the base of the caudal fin. Cranium rather 
elongate, and upper surface of snout granular. Pectoral fin-spines 
about as long and strong as the dorsal fin-spine, similarly marked 
with fine longitudinal striations and strongly serrated on the hinder 
border; pelvic fins with seven rays, inserted immediately behind 
the dorsal, which exhibits seven rays behind the spine; anal fin low, 
with twenty-eight rays; caudal fin very deeply forked, length of 
each lobe about equal to that of the terminal nineteen vertebrae. 
Form 4' Loc. Freshwater Tertiary Formation : Padang, Sumatra, 
