508 
The upper surface of the pre-maxillary, judging from the section of the right 
one, would form rather a narrow arch, differing very much in this respect from the 
broad semi-circular outline of I. camjpylodon. 
In describing the Tossil Eeptilia of New Zealand, Sir James Hector, P.R.S., 
has applied the name of Ichthyosaurus australis * to some remains found in that 
country. Sir P. McCoy’s name having priority, that of the New Zealand species will 
need alteration. 
Loc. Marathon Station, North-Central Queensland (C. W. Be Vis — Queensland 
Museum, Brisbane). 
Order-SAUROPTEETGIA. 
Genus — PLISSIOSATTBJIS, Gonyieare, 1821. 
(Trans. Geol. Soc., v., Pt. 2, pp. 560 and 581.) 
• PlESIOSAUEUS MACEOSPOITDTLTrS, McOoy. 
Plesiosaurus macrospondi/lus, MoCoy, Ann. and Mag. Nat. Hist., 1867, xix., p. .856 ; Hid., xx., p. 196. 
!> .> McCoy, Trans. R. Soc, Viet., 1868, viii., Pt. 1, p. 42. 
Sp. Char. Cervical vertebrffi only known ; each centrum three inches long, three 
wide, and two and a-half inches deep. (McCoy.') 
Ohs. Sir F. McCoy remarks that this appears to be specifically distinct from 
P. Sutherland i, by the extraordinary rugosity of the edges of the articular ends of the 
centrum, as in Plesiosaurus rugosus, each of which presents a remarkably elongated form. 
Our present knowledge of P. macrospondylus is very inadequate. 
Boo. Base of Walker’s Tabic Mountain, Flinders River (Messrs. Carson and 
Sutherland — National Mus., Melbourne). 
PijEsiosaueus SxjTnEELANDi, McCoy. 
Plesiosaurus Sutherlaiidi, McCoy, Ann. and Mag. Nat. Hist., 1867, xix., p. .856 ; Ibid., xx., p. 196. 
»» Tj McCoy, Trans. R. Soc. Viet., 1868, viii., Pt. 1, p. 42. 
» » Eth. fil., Ann. Eeport Dept. Mines N. S. Wales for 1887 [1888], p. 167, PI. 1, f. 1-4. 
Ohs. Sir F. McCoy has very briefly described the trunk vertebra of this reptile — 
too briefly for his remarks to be of much service in determining the species. He states 
that the length of the centrum is two and a-quartcr inches, the width three and three- 
quarters, and the depth two and a-half inches. These measurements. Prof. McCoy 
thinks, resemble those of P. australis, Owen, from New Zealand, but the proportions are 
obviously different. 
Thanks to the kindness of Sir F. McCoy, in forwarding his original specimens 
for comparison, I have been able to identify with his species some additional remains 
from Central Queensland. The fossils consist of the centrums of cervical vertebras, 
without qsrocesses. They are transversely ovate or ellipsoidal in outline, two and an eighth 
inches long, four and a-half wide, and two and three-quarters high. The upper surface 
is depressed convex, but below the middle line is sub-angular. The venous openings 
are two, large and distinct, the surface of the vertebrse exterior to them, and between them 
and the pleurae, more or less concave. The centrums have a well-marked, rather flattened 
articular surface, half an inch wide, but with sharp, erect, non-rugosc external edges. 
Within the articular surface each centrum is depressed, but not actually concave, in 
fact more flattened than concave, three inches by one and a-half, smooth, and with the 
faintest trace of a tubercle or prominence. The neurapojihysial and pleurapophysial 
surfaces are contiguous to one another ; and the last-named, although lateral in position. 
Trans, N. Zealand Inst, for 1873 [1874], p. 1.55. 
