
VL 
413 
NOTES ON SOUTH AUSTRALIAN MARINE MOLLUSCA, 
WITH DESCRIPTIONS OF NEW SPECIES.—PART VI. 
By Jos. C. Verco, M.D. (Lond.), F.R.C.S. (Hng.). 
[From ‘Transactions of the Royal Society of South Australia,” 
vol. xxaxt., 1907.] 
[Read August 6, 1907.] dae wltp 
Pirates XXVII. and XXVIU. pfopG/ecd 
Sepia braggi, sp. nov. Pl. xxvii., figs. 6, 6a, 6b, 6c, 6d. 
The animal from which this cuttlebone comes is un- 
known. It is 60 mm. long by 11 mm. broad at its widest 
part, with a maximum thickness of 4°75 mm. ‘The dorsal sur- 
face is very slightly convex in its anterior two-thirds, but 
markedly curved in the posterior third. The mucro of 2°75 
mm. in length projects at an angle of about 135°. The maxi- 
mum width and thickness is at 20 mm. from the anterior end, 
which is sharply rounded. Posteriorly it uniformly narrows 
to a minimum of 3 mm., and at its extreme end terminates 
in a thin circular expansion, 4 mm. in diameter, which ex- 
tends about 1°56 mm. beyond the base of the projecting spine. 
An orange-coloured line arises at the margins at the point 
of maximum width, and becomes plainer and wider as it 
extends backwards, and more prominent ventrally till it pro- 
jects nearly a millimeter in height, and is half a millimeter in 
width at the posterior end of the white substance, around 
which it circles. A longitudinal central furrow. deepest just 
in front of the widest part of the shell, grows shallower and 
wider anteriorly, and nearly vanishes at the posterior end. 
Dorsally a very low rounded central rib increases posteriorly 
to a width of 3 mm., and midway between it and the mar- 
gins of the bone is a scarcely perceptible longitudinal depres- 
sion. . 
Tts nearest ally is S.-elongata, Fer and Orb, Céph Seiches, 
t. 24, f. 7-10, 1839; Tryon, Man. Conch., vol. i., p. 198, pl. 
xcl., figs. 418, 419. Hab., Red Sea. The animal of that spe- 
cies is also unknown. The sepiostaire as figured in Tryon 
is only 45 mm. long, is less attenuated posteriorly, has a 
comparatively wider hollow expansion at the posterior end, 
is curved for a much shorter length posteriorly, and has its 
Spine not set at an angle, but curving backward, so as to 
continue the nearly straight dorsum of the bone. The chalky 
substance, too, seems much thicker, and to more suddenly 
pane forward. The dimensions are not given in Tryon’s 
ext. ; 
alle 
