SrrrC/9 . 
/ 
488 
Z<r<7- //* 
<£crr2)'r7< s ^ 
A * 17 ‘ 
actixopteuygij. 
Genus ARCHiEOMiENE, A. S. Woodward. 
[Described in forthcoming Mem. Geol. Surv. 1ST. S. Wales, 
Palaeont. no. 9.] 
Trunk elegantly fusiform and laterally compressed, with con¬ 
spicuous upper caudal lobe. Head small and snout obtuse; one 
large suborbital occupying the greater part of the cheek behind the 
orbit; oral border of maxilla convex; teeth all small, those of the 
margin of the jaws arranged in close regular series. Notochord 
persistent; hypocentra and pleurocentra rudimentary or absent; 
ribs long and slender. Fulcra small on all the fins. Pelvic fins 
nearly as large as the pectorals ; dorsal and anal fins acuminate and 
opposed, the former short-based, the latter more extended; caudal 
fin forked. Scales thin, deeply imbricating, and almost cycloidal, 
those of the flank not deepened, and those of the dorsal and ventral 
aspect about as deep as broad; conspicuous obtuse ridge-scales 
dorsally and ventrally. 
Archseomsene tenuis, A. S. Woodward. 
[Described in forthcoming Mem. Geol. Surv. N. S. Wales, Palaeont. 
no. 9, with drawings on pi. ii. figs. 5, 6.] 
Type. Fish; Museum of Geol. Surv. N. S. Wales, Sydney. 
The type species, commonly attaining a length of about 0T2. 
Head with opercular apparatus occupying somewhat less than one- 
fifth of the total length of the fish ; maximum depth of trunk equalling 
about one-third of the length from the pectoral arch to the base of 
the caudal fin. Pectoral fin with from 10 to 12 rays, the foremost 
especially stout; pelvic fins arising midway between the pectorals 
and the anal, each with about 6 rays; dorsal fin comprising about 
10 rays, arising behind the middle point of the back directly 
opposite to the origin of the anal, which has not less than 14 rays. 
Scales exhibiting only the concentric lines of growth. 
Form, Log. Upper Hawkesbury-Wianamatta Series : Talbragar, 
N. S. Wales. 
Not represented in the Collection. 
Archreomsene robustus, A. S. Woodward. 
[Described in forthcoming Mem. Geol. Surv. N. S. Wales, Palaeont. 
no. 9, with drawings on pi. v. figs. 2-4.] 
Type. Head with part of abdominal region; Museum of Geol. 
Surv. N. S. Wales, Sydney. 
A species commonly attaining a length of about 02. Head with 
opercular apparatus occupying about one-fifth of the total length of 
