246 
ingly soldered together ; operculum with several rows of 
large scales ; lateral line continuous. 
Heteroscarm Filamentosus. — Cast. 
The three first dorsal spines prolongated in long filaments. 
D., 15/11 ; A., 2/12. 
Seteroscarus M.o destus . — C as t . 
The first dorsal spines less prolongated. D., 14/10; A., 
2 / 11 . 
21. Platycephalus Imps ? — Jenyns. 
Accords well with the description, with the exception of the 
colonr of ventrals and anal, which are of a light yellow, 
covered, like the other fins, with black punctiform spots. 
23. Fnoplosus Armatus. — White. 
All the specimens are of a remarkably bright colour, and the 
cross-bands extend more on the second dorsal and on the 
anal than on the Melbourne specimens. 
24. Diodon Spinosissimus ? — Cuv. 
25. Aracana Ornata. — Gray. 
26. OpJiiclinm. — Cast. 
This new genus is characterised by — Body very elongate ; 
mouth opening upwards ; snout having two short filaments ; 
ventral fins inserted in front of the pectorals, being formed 
of one short and two long filaments; dorsal composed of 
numerous spines and two rays, which are situated poste- 
riorly ; it has no anterior detached portion, and is, as the 
anal, attached to the caudal ; the anal has no spines ; lateral 
line only marked on the extreme anterior part of the body ; 
teeth very numerous, short, very thick, crowded on all the 
bones of the palate, and also on very numerous rows on the 
lower jaw. 
OpJiicl. Antarctious. — Cast. 
Dorsal with sixty-three spines and two rays; anal with 
thirty -nine rays. Of a brownish red, with the lower parts 
lighter. 
