


; 216 
vol. xv. (n. s.), pt. 2, p. 195: Acemea cantharus, Reeve, Pilsbry., 
Tryon, Man. Conch., 1891, vol. xiii., p. 55, pl. xxxvii., figs. 1, 2; 
Tate and May, Proc. Linn. Soc., N.S.W., 1901, vol. xxvi., p. 412. 
The type locality is New Zealand. Tate and May list it 
as a distinct species. Pritchard and Gatliff cite it as a syno- 
nymof 4. sentiformis, Quoy and Gaimard. A shell from.Port 
MacDonnell, collected in numbers, is probably Reeve’s shell. 
A. sentiformis, Quoy and Gaimard, is also abundant there. 
The two forms may run into each other, but the intermediate 
grades have not been taken. It is larger, much less depress- 
ed, narrower anteriorly, with the apex much nearer the front 
margin. It is very greatly and roughly eroded, and does not 
show any radial striz on the uneroded nart. The coloura- 
tion consists of radial brown or back stripes, varying in num- 
ber and width. Internally they are very dark, a blotchy 
brown or a uniform blackish brown, lighter or whitish at the 
summit. The margin is articulated brown and white. The 
muscle scar is very plain as a white horseshoe, and here the 
shell is translucent, especially at the anterior part. Possibly 
they may be senile examples of A. sentiformis, though their 
marked erosion contrasts strongly with the usually well-pre- 
served surface of these. 
Family FISSURELLID A. 
Genus Emarcinuta, Lamarck. 
Emarginula superba, Hedley. 
Records of the Aust. Mus., 1906, vol. vi., pt. 8, p. 216, pl. 
XXxvil., figs. 7, 8; type locality, 250 fathoms, east of Port Jackson. 
My specimens have been identified by Mr. Hedley from’ 
his type. His shell was bleachd, so to his description the fol- 
lowing may be added: —Colour light pinkish-brown, deepest 
over the expanded posterior surface, gradually fading anteri- 
orly towards the slit. It is deeper in concentric rings, which 
leave blotches on the bounding lamina of the slit fasciole ; nine 
are counted in the lower two-thirds. Alternate primary ribs. 
are white from apex to margin, and are separated by one 
primary and two secondary ribs, which are coloured. The 
anterior four of these white rays on each side of the slit are 
separated only by the one rib, the secondaries being absent. 
The colouring of the shell confirms the propriety of the name 
“superba,” 
Individuals vary. Mr. Hedley’s figure is almost uni- 
formly elliptical. Some South Australian examples are much 
expanded posteriorly, being broadest on a level with the apex, 
\ and. thence are\attenuated anteriorly.. These are also much 
flatter towards the margin posteriorly than the type. Others 
are elliptical, but less flat posteriorly than the type, and 
SLES, 
AS 
