96 
Dredged alive, 13 fathoms, 1; 15 fathoms, 1; 17 fathoms, 2. 
Dead from 13 to 22 fathoms (J. C. Verco), Tasmania. 
3. M. umbilieatus, Ven.-Woods. ( Trophon umbilicatus ). 
Ref.—Papers and Proceedings of the Royal Society of Tas- 
mania, 1875-76, p. 135. 
Syn.—M. scalaris, A. Adams (non Brocchi), Proc. Zool. Soc., 
1853, p. 71. 
Tryon in his Man. vol. IT., p. 155, has placed it in Urosalpina, 
which he defines as having a purpuroid operculum. But this 
species has a muricoid operculum, and belongs to the genus 
Murex. It was formerly confounded with I. octogonus, Quoy, 
Voy. de L’Astrol., 531, t. 36, figs. 8, 9. 
Type specimen from the E. coast of Tasmania, uncommon. 
Hab.—Spencer Gulf, St. Vincent Gulf, Backstairs Passage, 
Encounter Bay. 
Dredged alive, 8 fathoms, 1; 12 fathoms, 2; 13 fathoms, 1 ; 
14 fathoms, 2; 17 fathoms, }; 19 fathoms, 2 (J. C. Verco). 
4. M. Brazieri, Angas. 
Ref.—Proc. Zool. Soc., 1877, p. 171, pl. 26. 
This was formerly confounded with WZ. polypleurus, Brazier. 
According to Angas, it is somewhat allied to IM. mundus, 
Reeve; and according to Brazier, in Proc. Linn. Soc., N.S.W., 
vol. VIII., pt. I., Zrophon tumidus, Petterd, is a synonym. 
Hab.—Spencer and St. Vincent Gulfs, Investigator Straits, 
and Backstairs Passage (J. C. Verco), Encounter Bay (D. J. 
Adcock ). 
Type specimen, Port Jackson Heads, 20 fathoms. Dredged 
alive, 17 fathoms, 1. Dead at 17, 19, and 22 fathoms, several. 
Many alive and dead in deep-water dredge-siftings (J. C. Verco). 
5. M. serotinus, A. Adams. 
Ref.—Proc. Zool. Soc., 1851, p. 268. 
Syn.—M. Blainvillei, Payr., a Mediterranean form, according 
to Sowerby. 
Hab.—One specimen, obtained alive, amongst the rocks at low 
water, spring tides, Aldinga Bay (Angas). 
No other collectors have taken it in Australia. 
6. M. polypleurus, Brazier. 
Ref.—Proc. Linn. Soc., N.S.W., vol. VITI., 1894, part I, p. 
172. 
This was formerly known here as I. pumilus of A. Adams, 
but proves to be quite a distinct shell. Brazier refers it to the 
subgenus Pseudo-Murex, Monteserato, 1872. 
Hab.—Several alive and dead in deep water in Spencer and 
St. Vincent Gulfs, depth not measured (./. C. Verco). 
