194 
MEMOIRS OF THE QUEENSLAND MUSEUM. 
Family SQUALL DAL 
Genus Squalus Linne, 1758. 
The Australian Dogfishes are perhaps not strictly congeneiic with Squalus 
acanthias Linn', the genotype of Squalus selected by Jordan and Gilbert (Bull. 
I . S. Nat. Mus. iii. 16, 1882, p. 16). Synonyms of this genus have the same 
genotype and are : Squallus Scopoli, 1777 ; Acanthorhinus Blainville, 1816 ; 
Acanthias Eichwald, 1819 ; and Carcharias Gistel, 1848, preoccupied. 
SQUALUS MEGALOPS (Macleay). 
(Plate XXVII, fig. C.) 
Acanthias megalops Macleay, Proc. Linn. Soc. N. S. Wales vi, 2, Sept. 12, 1881, p. 367. 
Port Jackson. 
My friend, Mr. W. J. Phillipps, recently supplied a brief review of the 
Piked Dogfishes of New Zealand and Australia (N. Z. Journ. Sci. Tech, xii, 
6, 1931, pp. 360-361), in connection with which it is of interest to reproduce 
the accompanying drawing by the late A. R. McCulloch of a Victorian example 
of Squalus megalops , 404 mm. long. Austr. Mus. regd. no. I. 10826. 
Family Isuridjs. 
Genus Isuropsis Gill, 1862. 
Isuropsis mako (Whitley). 
Isurus mako Whitley, Rec. Austr. Mus. xvii, 1929, p. 101, New Zealand. 
This is the Mako shark of the New Zealand fishermen and the Blue 
Pointer of Australia. I have examined specimens in the Museums of Sydney, 
Adelaide, and Wellington, and freshly caught examples. 
Making allowance for shrinkage in preserved specimens, the Australian 
form seems more slender than the South African, 7. bideni (Phillipps), and has 
a shorter snout ; height of dorsal about £ head, slightly more than \ depth 
of body. A three-foot mounted specimen (Austr. Mus. regd. no. I. 2756) of 
the Blue Pointer from Manly, New South Wales, has depth 7 in total length. 
Eye 3 in snout. Distance from anterior border of eye to that of nostril 4 in 
distance from posterior margin of eye to first gill slit. Interocular width (67) 
longer than length of snout from level of anterior margins of eyes (81). 
Internarial space (46) 1*2 in distance from nostril to end of snout (58). 
Lower caudal lobe (126) 1*24 in upper (157). Caudal peduncle not 
nearly twice as wide as deep. Depth of body more than 5 in length without 
caudal in mounted specimen. Second dorsal entirely in advance of anal. 
Another specimen of Isuropsis maho from Rosa Gully, South Head, 
Port Jackson (a young male caught 15/10/30 on line over a sandy bottom) 
had the following characters : — 
13 + 13 
Dental formula— — . Teeth in two functional series. 
13 + 13 
