120 DOLABRIFERA. 
Bourbon (see Moll. de Bourbon, p. 53, pl. VII, figs. 20-22), is 
much more regular in shape, more like the seed of our common 
plane (Acer pseudo-platanus), with a regular shaped wing and a 
head or nucleus continuous with the body iustead of, as here, a 
fleam-like blade and distinct handle. ( Watson). 
Species of Australia and Polynesia. 
D. BRAZIERI Sowerby. 
Soft parts unknown. Shell straight, rather flat ; apex elevated, 
straight, thick; rounded and convex within, concave outside ; pos- 
terior margin sloping, concave; labial margin nearly straight, an- 
teriorly incurved, sinuous; left margin nearly straight. (Sowd.). 
Length ? inch. (Angas). 
Northhead, Botany Bay, and“ Bottle and Glass” rocks, Port Jack- 
son, Australia (Brazier). 
D. brazieri Sows., P. Z. S., 1870, p. 250.—Aneas, P. Z.S., 1871, 
p99; BoZ S167 7 pals! 
Only two specimens of this, the first species of the genus found on 
the southwest coast of Australia, were taken by Mr. John Brazier. 
No note seems to have been taken of the characters of the animal, 
but the shell, which is large, differs from that of other known spe- 
cies. (Sowb.). 
D. JACKSONIENSIS n. sp. PI. 44, figs. 38, 39, 40, 41. 
Alcoholic specimen, length 28, breadth 16, alt. 6 or7 mill.; broad 
ovate, the head narrow, foot expanded and depressed toward the 
periphery ; back moderately convex. Dorsal slit short (7 mill. 
long), the pleuropodial lobes contiguous in the middle, gaping button- 
hole like behind, diverging in front, the anterior insertions rather 
separated. Tentacles and rhinophores as usual in the genus, trumpet- 
shaped. Eyes black, distinct. Integument light yellowish, blue- 
tinged over the viscera, wrinkled (from contraction) and bearing 
rather distant warts, some of which behind and at the sides are 
pointed. Mantle not perforated over the shell, not covering the 
gill. Genital pore some distance anterior to the forward end of dorsal 
slit. 
Shell (pl. 44, fig. 40 outside, fig. 39 profile, fig. 38 inside view) 
thin, squarish below, the posterior half tapering ; apex curved toward 
the sinus, very heavily calloused within. Sinus long, concave above, 
