anitaliks,, and at the other with aie small uniform crowded 
ribs. Later, these were found to be on the one hand more 
prickly and costate than specimens of P. aculeata, from New 
South Wales, and on the other to be identical with P. hepa- 
tica, from Victoria. I feel confident that a larger series will 
unite these three as conspecific, and they will be called P 
ustulata, Reeve. 
filllanag PateHa chapmani, Ten.-Woods. 36 
Patella chapmani, Ten.-Woods, Proc. Roy. Soc., Tasm., 1876 
for 1875, p. 157; Pilsbry., in Tryon, Man. Conch. ., 1891, vol. 
xlii., p. 101; Pritchard and Gatliff, Proc. Roy. Soc., Vict., 1903 
vol. xv. (n. s.), p. 193; Tate and May, Proc. Linn. Soc., 1901, vol. 
Xxvi. 0. 
Staten alba, Ten.-Woods, Prec. Roy. Soc., ety 1877 for 
1876, pp. 155, 156; Pilsbry., 1891, op. cit., p. 54, pl. xlii., figs. 
76-78; Tate and May, loc. cit.» Pritchard and Gatliff, loc. cit. 
Tate and May, loc. cit., "identify. it with P. stellacformas, 
Rve., Conch. Icon., f. 48. It t rare in S. Aust., but has been 
taken at Port MacDonnell (W. T. Bednall) and at Royston Head, 
Yorke Peninsula. 
Genus Nacretua, Schumacher 
Maclay Nacella parva, Angas. a7 
Nacella parva, Angas, Proc. Zool. Soc., 1878, pl. liv., f. 12; 
“Hab., Holdfast Bay and Aldinga Bay; parasitic on Be ai 3 
Adcock, Handlist of Aquatic Moll. 1893, p. 9, No. 393. It has 
been found as far east as Aldinga ay, ‘and as far west 
a3 Fowler’s Bay. It appears to be of limited habitat, for Pritchard 
and Gatliff do not record it in their Victorian catalogue, nor 
Tate and May in their Tasmanian Census. I have not seen it 
from W. Australia. 
Tivol Nacellalcompressa teres ov Mmee eri erpeM aan 
Shell narrowly elongate, elliptical; sides straight, par- 
allel; ends round. Apex overhangs one end (which is con- 
cave vertically, and slightly narrower than the other), barely 
oblique slightly to the left of the midline. Dorsum conyex, 
rising higher than the nucleus. Sides nearly vertical; base 
flat, margin simple. Concentric growth lines, and micro- 
scopic radial scratchings. 
Dim.—Length, 5 mm.; breadth, 1°6 mm.; height, 1:25 
mm, 
Locahity.—Investigator Strait, 15 fathoms, 6 dead. 
en —Its shape separates it from V. parva, Angas, 
| which measures 5°6 mm. by 2°8, and is therefore twice as wide 
| for the same length. It may be only a variant of this species, 
cramped by residence on very narrow zostera or other growth. 
bakers crebristriata, Verco. ali 
vil. 
Trans. Roy. Soc., S. Aust., 1904, vol. xxviii., p. 144, pl. x 
figs. 20, 21. 

it 
\ 
iit 
ik 
