280 J.D. OGILBY AND A. R. McCULLOCH. 
in having the first dorsal fin originating over the posterior 
base of the ventral as in other members of the genus, 
instead of being ‘“‘inserted almost wholly above the 
ventrals.’’ If the dermal papillz on the dorsal surface, 
which are distinct in our specimen, are normal, they 
readily distinguish this from all other species. 
Dr. Gunther places great reliance on the narrowness of 
the interdorsal space to differentiate this species from the 
others, but as pointed out by one of us (Ogilby, supra loc. 
eit.) this is unreliable, specimens of O. barbatus in the 
Australian Museum having that space quite as narrow as 
that of the O. tentaculatus above mentioned. 
BRACHALURUS, Ogilby. 
Brachelurus, Ogilby, Proc. Roy. Soc, Queensl., xx, 1906, p. 27 
(Chiloscyllium modestum, Giinth.); Ogilby, loc. cit., xxi, 1907, 
p. 3 (B. colcloughi, Ogil.). 
Cirriscyllium, Ogilby, loc. cit., xxi, 1907, p. 4 (Ch. modestum, 
Ginth.). 
Brachelurus, Regan, Proc. Zool. Soc., 1908, p. 354. 
The genus Brachcelurus was originally proposed without 
diagnosis to receive Chiloscyllium modestum, Gunther. 
Through an unfortunate oversight it was applied later to 
B. colcloughi, Ogilby, and the new name Cirriscyllium was 
proposed for Ch. modestum. The fact that Brachcelurus 
was definitely associated with Ch. modestum prevents its 
use with B. colcloughi, and the new name Heteroscyllium 
has been proposed by Regan’ to receive the latter species. 
Bracheelurus differs from Heteroscylliwm in the much 
larger scales and the absence of a lateral line; the head 
is wider and strongly depressed, and the mouth is 
placed well in advance of the eye; the ovate spiracles are 
only partially behind the eye; the anal fin is inserted farther 
1 Ann. Mag. Nat. Hist., ii, (8) 1908, p. 455. 
