504 
and rather less between the fangs. The upper margin of the root describes almost an 
ellipse, the fangs being thick and obtusely rounded. The crown is rather more 
than half an inch high, rather flattened on the inner surface, and gently arcuate 
from before backwards, with the lateral or cutting edges and the apex sharp. 
The basal cusps are small, but prominent and sharp, the posterior of the two being 
the larger. 
This tooth is in all probability from the upper jaw, and from its arcuate outline 
somewhat posterior in position. The specimen was carefully compared with a large 
series of similar teeth from the Cretaceous rocks of England, and found to agree 
excellently with Agassiz’s species, especially that form represented in his PI. 32, f. 15, 
the present example being but slightly more arcuate. 
Loc. Limestone at Kamilaroy, Leichhardt Eiver, N'orth-west Queensland 
{B. L. Jack). 
Order— (JANOIDEI. 
Eamily— ASPIDOEHT]SrCHID.E. 
Oenus — ASPIDOBSYBCHnS, Agassiz, 1833. 
(Rech. Poiss. Foss., ii., Pt. 2, ii. 135.) 
Ohs. Mr. E. Etheridge, F.E.S., has recorded* the caudal portion of the vertebral 
column, and several of the pecnliarly elongated scales of this genus. It is possible, 
however, that these fragments may belong to the following genus. 
Loc. Hughenden {The late B. Laintree') . 
Oenus — BELONO8T0MUS, L. Agassiz, 1844. 
(Rech. Poiss. Foss., ii., Pt. 2, p. 140.) 
Belonostomtjs Sweeti, Eth. jil. and A. S. Woodw. 
Belomstomus Sweeti, Eth. fil. and A. S. Woodw., Trans. R. Soc. Viot, 1892, ii. (2), Pt. 2, p. 1, t. 1. 
Ohs. For a full description of the remains of this fish the Eeader is referred to 
the Paper by Mr. A. S. Woodward, F.Z.S., and the Writer. It is believed to be the 
largest species of the genus, measuring one foot three inches in length. It was a much 
less slender fish than the typical J urassic species, B. tenuirostris, Ag., and B. sphyreenoides, 
Ag.,and the superficial ornament of the scales was much more conspicuous and elaborate. 
The only Belonostomus w'hich appears to be at all comparable to the Queensland species 
is the large B. Comptoni, Ag., sp., from Brazil, the scale sculpture of the latter being 
equally conspicuous with our species, with this exception, that the principal flank scales 
never appear to exhibit the prominent, fine, transverse striations so characteristic of 
the hinder margin of all the flank scales of B. Sweeti. 
Belonostomus lived in the same geological periods in Europe, India, and Brazil, 
and its discovery in Queensland is thus of great interest, as extending still further the 
ascertained geographical range of the genus during Mesozoic times. 
Loc. Hughenden {O. Sweet — Colin. Sweet; senHi L) . P . Byan — Colin. Geological 
Survey, Queensland). 
Quart. Journ. Geol. Soc., 1872, xxviii., p. 346. 
