PALiEONISCIDiE. 
515 
Genus MYRIOLEPIS, Egerton. 
[Quart. Journ. Geol. Soc. vol. xx. 1864, p. 3.j 
Trunk fusiform, but robust. Head large, suspensorium oblique 
and gape wide ; dentition comprising a series of large, well-spaced 
laniaries. Fins well developed, with small fulcra, the rays branch¬ 
ing distally and all [except possibly the anterior rays of the pec¬ 
toral fin] closely articulated. Pectoral fins relatively large; dorsal 
and anal fins high and triangular, the former opposed to the space 
between the pelvic pair and the anal; caudal fin deeply cleft, equi- 
lobate. Scales very small, obliquely striated, enlarged upon the 
sides of the upper caudal lobe; ridge-scales of upper caudal lobe 
prominent. 
Myriolepis clarkei, Egerton. 
1864. Myriolepis clarkei , Sir P. Egerton, Quart. Journ. Geol. Soc. 
vol. xx. p. 3, pi. i. fig. 1. 
1890. Myriolepis clarkei, A. S. Woodward, Mem. Geol. Surv. H. S. 
Wales, Pakeont. no. 4, p. 8, pi. ii. figs. 3, 4, pi. iii. fig. 1. 
Type. Imperfect fishes, wanting tail; destroyed by accidental 
fire, Museum of Geol. Survey, H. S. Wales. 
The type species, attaining a length of about 0*45. Maximum 
depth of trunk nearly equal to the length of the head with opercular 
apparatus, and contained about five times in the total length. Pelvic 
fins half as large as the pectoral pair, situated midway between the 
latter and the anal; dorsal fin somewhat longer than deep; anal 
fin smaller than the latter, but equally elevated. Scales extremely 
small, those of the flank in an individual 0*435 in length not 
measuring more than 0*0015 in depth and breadth. 
Form. Log. Hawkesbury Beds (Upper Trias): Hew South 
Wales. 
Hot represented in the Collection. 
A shorter and stouter species of Myriolepis , with relatively larger rf. Iol /a 
scales, also from the Hawkesbury Beds, is named M . lata, A. S. ^ /fjp 
Woodward, op. cit. p. 10, pi. iii. figs. 2, 3. The type specimen is in ' p.-j-.x/, 
the Museum of the Geol. Survey of H. S. Wales, Sydney, and there 
are e© examples in the British Museum Collection. 
In this genus, perhaps, may also be placed the so-called Palceo- 
niscus antipodeus, Sir P. Egerton, Quart. Journ. Geol. Soc. vol. xx. 
(1864), p. 4, pi. i. fig. 4, and woodc. An imperfect specimen appa¬ 
rently referable to M. clarkei has lately been noticed under the t 2 
same name by O. Eeistmantel, Mem. Geol. Surv. H. S. Wales, 
Palseont. no. 3 (1890), p. 72, pi. xxx. fig. 1. 
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