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OPEUTAEOGE JIAEAIOEATA. 
Apistus marmoratus, Guv. ^ Val.,v. ir., p. 416; Cm., B. 
An. lllustre, p>L 24, fig, 3. 
Heiglit three and one-fourth times in total length ; breadth of 
body three and one-quarter times of the same ; head three and 
one-fifth in entire length. The dorsal has thirteen spines and 
ten soft rays, but the last of the spines might he counted with the 
soft part ; the third spine is the longest ; the anal has three 
spines and six rays ; the caudal has twelve rays ; the pectoral 
eleven. 
The colour is of a light olive on the upper and lateral parts, 
and white on the lower ; the body is covered with large marmo- 
rated purple blotches, between .which are numerous punetiform 
marks of the same colour ; the dorsal, caudal, and anal are of the 
colour of the back, with similar spots ; there is a broad purple 
band on the external part of the caudal and pectorals ; the ven- 
trals are white. 
This sort is scarce at Melbourne. I have only seen three speci- 
mens — one three inches long, and the largest about seven. The 
eyes of the two smallest were purple, with an external series of 
small spots ; the largest had its eyes yellow. 
The specimens described by Cuvier and Valenciennes had been 
brought from Timor by the learned naturalist Peron ; but this 
sort is found on all the western and southern shores of Australia. 
PLATTCEPHALUS. 
This is certainly a tropical form, though a few of the sorts 
extend to the coasts of Japan. Numerous species are found in 
Australia, and are known under the name of Flat Heads. They 
are more common in the cold than in the warm season. 
PLATTCEPHAUTrS EICHAEDSOKI. 
Height of body nine times in total length ; breadth six times ; 
head (to end of operculum) three and a-half times ; orbit 
five times in the length of the head on the middle line, or 
six times to the end of the operculum. Head very flat, very 
broad, rounded in front, the transverse line before the eyes being 
only one and a-half times in the length of head, talien in its 
