SEMION OTIDiE. 
65 
Aphnelepis australis, A. S. Woodward. 
[Described in forthcoming Mem. Geol. Surv. N. S. Wales, Palaeont. 
no. 9, with drawings on pi. iii. figs. 1-4.] 
Type. Nearly complete fish ; Geol. Survey Museum, Sydney. 
The type species, attaining a length of about 0*2. Length of head 
with opercular apparatus contained about one-and-a-half times in 
the maximum depth of the trunk, and somewhat less than one- 
quarter of the total length of the fish ; the caudal pedicle one-third 
as deep as the abdominal region at its highest point, where the 
dorsal fin arises. Pelvic fins arising opposite the origin of the 
dorsal, and the latter completely in advance of the anal; dorsal rays 
about 14, anal rays 10 in number. Scales ornamented with coarse 
crimpings, which are slightly radiating and usually confined to the 
hinder half. 
Form. Sf Loc. Upper Hawkesbury-Wianamatta Series : Talbralgar, 
New South Wales. 
Not represented in the Collection. 
A large variety of Aphnelepis , perhaps identical with A. australis,. 
is also described and figured, loc. cit. pi. iii. fig. 5. 
Genus SERROLEPIS } Quenstedt. 
[Handb. Petrefakt. 1852, p. 207.] 
An indefinable genus founded upon detached flank-scales. These 
scales much deeper than broad, with a straight narrow overlapped 
margin, a large peg-and-socket articulation, and no sharp inner keel; 
the exposed portion ornamented with transverse ridges, terminating 
in denticulations at the posterior border. 
A fragment of jaw, exhibiting a close series of stout styliform 
teeth, is described by Dames as having been found in association 
with the scales (Palaeont. Abhandl. vol. iv. 1888, p. 172, pi. xiii. 
fig. 8). It may possibly pertain to the same genus. 
Serrolepis suevicus, Dames. 
1852. Serrolejns, F. A. Quenstedt, Handb. Petrefakt. p. 207, pi. xvii. 
fig. 13. 
1888. Serrolejns suevicus, W. Dames, Palaeont. Abhandl. vol. iv. p. 171, 
pi. xiii. figs. 4-7 (? 8). 
Type. Isolated scales; Tubingen University Museum. 
The type species, known only by isolated scales, of which the 
largest measure about 0-015 in total depth, and are four times as 
deep as broad in their exposed portion. Posterior denticulations 
PART III. ? 
