221 
the pit are nearly vertical and laminar, and rather close to- 
gether; especially the first two; the posterior three become 
gradually more distant, stouter especially at their outer 
ends, shorter, and more diverging, lying perpendicular to 
the curving posterior margin. The last one in the right 
valve is peg-shaped. Behind, there is a rather long lamellar 
triangular tooth. The posterior muscle-scar is very large, 
curved, and oval, and placed low down beyond the lateral 
tooth. The inner margin is smooth and simple. The shell 
is covered with a dark-brown, smooth, shining, closely-adhe- 
rent epidermis, which wears off dead shells, remaining last 
about the umbos. Dead shells are translucent, milky-white. 
Dimensions.—Umbo-ventral diameter, 2°5 mm.; antero- 
posterior, 1°9 mm. ; section of closed valves, 1°6 mm.; a large 
example is 3 mm. by 2°3. 
Habitat.—104 fathoms, 35 miles south-west of Neptunes, 
many alive and dead, and valves. 
Some Ostracoda, taken in the same haul, are very 
like them. 
Lissarca Pubricata, Tate.  /= LL O 
Limopsis rubricata, Tate, Trans. Roy. Soc. South Austr. 
1886, vol. ix.. p. 71, pl. v., fig. 6. Type locality, alive from 33 
fathoms, Backstairs Passage; op. cit., p. 104, No. 188: Tate and 
May, Proc. Linn. Soc. N.S. Wales, 1901, vol. xxvi.; part 3, p. 
437, Pirate Bay, Tasmania; Hedley, Memoirs Austr. Mus., 
1902, vol. iv., part 5, p. 297, valves, 41-50 fms., off Cape Three 
Points; Pritchard & Gatliff, Proc. Roy. Soc. Vict., 1904, vol. 
xvii. (N.S.), part 1, p. 246, Western Port. 
Taken alive in Backstairs Passage, 17 fathoms; dead in 
St. Vincent Gulf, and off Cape Borda, in 62 fathoms, dead, 
but perfect. It is recorded from Cape Borda, round the 
coast of Victoria and Tasmania, to New South Wales. 
Tate remarks:—‘“Probably a young shell, but not re- 
ferable to any known species.” Abundant material proves 
it to be full grown, and a distinct species. There are 5 
radial flames, increasing in width as they diverge. Tate gives 
four. 
Lissarca rhomboidalis, n. sp. P!. xxvii, fig. 7. F3 
Shell minute, solid, translucent, horn-coloured, ovate- 
rhomboid, equivalve, inequilateral, about twice as long be- 
hind the umbo as in front. Umbos prominent, round, wide, 
slightly prosogyre. Dorsal border faintly uniformly curved, 
continuing into the narrowly-rounded anterior end, and into 
a much more widely-curved posterior end, which is faintly 
truncated behind. There is a perceptible excavation where 
the anterior end joins the ventral border. A narrow sub- 
umbonal area, bounded outside by a straight, slightly prom- 
f 
