]?ELEMNITES OXYS, TcU. IJ'oods. 
(I'l. VI, 4-0 ; PI. YTI, Figs. 5-7 ; PI. VI II, Figs. 4-0, ? 7.) 
HclcnitiUPS ((Usfrol Is, Tate {non Pliillips, ncc Hector), Trans. Phil. Soc. S. Auslr. for 1S7S- 
79 (1879), II, p. 50. 
Second species of Belem nit es, Tate, Trans. P. Soc. S. Anstr. for 1S79-S0 (ISSO), III, 
p. 105. 
Belemnites O nsfeolis, Ten. ^Voods, Proc. Linn. Soc. N. S. Wales, 1883, VIII, Pt. 2, p. 230. 
Belemni/es O.rys, Ten. Woods, Proc. Linn. Soc. N. S. Wales, 1883, VIII, Pt. 2, p. 237, t. 13, 
f. 1-3. 
Belemnites oust rat is, Tate, Trans. IL Soc. S. Anstr. for 1885-80 (1887), IX, p. 53. 
Belemnites australis, Tate, Proc. Anstr. As, soc. Adv. Sci. for 1888 (1889), I, p. 230. 
Belemnites oxys, Eth. fd., Gcol. Pal. t)'land, Ac., 1892, p. 188. 
Sp. Char. — Guard hastate, long', tapering to a dra\vn-oiit point; dorsum 
convex throughout ; venter convex in the alveolar and flattened in the post- 
alveolar region. Dorso-lateral grooves sharp and deeply impressed, curving 
slightly on to the venter near the ajtical region of the alveolus, then slightly 
dorsally, and gradually fade out towards the apex of the guard, hut do not 
actually reach the latter. Guard (as preserved) 23 mm. in diameter in both 
directions at its anterior end, but at the terminations of the deeply cut 
portions of the dorso-lateral grooves the diameter is 21mm.; length 147 mm. 
Alveolus (as preserved) 43 mm. long, with a diameter of 16 mm. at its 
anterior end. 
Ohs. — I take this opportunity of rctiguring Teuison Wood’s type of his 
B. oxys through the courtesy of the Committee of Management of the 
]\[acleay Museum. 
Teuison Woods rennirked : “In the foregoing diagnosis it will be seen 
that our specimen differs from B. australis in its greater length, in tapering 
to a 25oint, and the slightly different curvature of the lateral groove. It 
resembles it in all other particulars, especially in the depression by lateral 
expansion of the post-alveolar region, in the lateral grooves being so sharply 
cut in the alveolar and post-alveolar region and in the absence of the ventral 
groove.” 
The drawn-out posterior end or apex of the guard gives to that of B. 
oxys a very different outline to the guard of B. australis, Pliill. (restricted), 
and urdcss intermediate forms can be intercalated on any future occasion the 
two names will, in my opinion, liave to stand for respective s])eeies. 
