APLYSIID&. 123 
P. angasi, Crosse (?,) Jour. de Conch., 1865, pl. 2, f. 5; Reeve, 
Conch. Ic., f. 4. Shell large, ovately sub-quadrate, or acuminated, 
white, spirally substriated, concentrically slightly undulated ; aperture 
wide, posteriorly sub-quadrate, elevated ; penultimate whorl elongated 
(Sowerby. ) 
Auckland. 
As I have not seen the animal, this identification is conjectural ; the 
only shell I have seen was small. 
FAMILY—APLYSIID%. 
Teeth, central one, lateral numerous, similar. Head with separate 
ear-like tentacles ; eyes sessile on the head. Mouth armed with horny 
jaws, and with produced labial tentacles. Mantle with an internal 
calcareous plate protecting the gill. Foot with large lateral lobes, 
usually folded across the back. Shell rudimentary, internal, contained 
in the mantle. The gizzard is armed with teeth; the reproductive 
orifices are beneath the right tentacle ; and the anus is dorsal, and is 
either sessile or tubular. 
Genus, APLYSIA--Gmelin. 
Body elongated ; gills concealed ; foot with the lobes dilated, and 
serving for swimming; anal aperture simple, sessile. Shell sub- 
cartilaginous, ovate ; apex acute. When molested they discharge a 
purple fluid. 
A. brunnea, Hutton, Trans. N.Z. Inst., vi, p. 279, pl. xxi., f 
Animal of a uniform rich dark brown, about four inches in length. Shell 
horny, ear-shaped, firm, the whole shell very finely concentrically 
striated ; epidermis pale brown. 
Length, 9 ; breadth, °7 inch. 
Wellington and Dunedin. 
A. venosa, Hutton, Trans. N.Z. Lnst., vi., p. 279, pl. xxi, f- 
Animal yellowish-brown, veined with dark brown, about six inches in 
length. Shell membranous; the apex rather coarsely concentrically 
striated, the rest of the shell smooth and polished; epidermis pale 
straw-colour. 
Length, 1°25; breadth, 1 inch. 
Wellington. 
Genus, ACLESIA—Rang. 
Body oval, pointed behind, covered with digitated appendages ; 
gills included within the branchial cavity ; anal orifice simple. Shell 
none. 
A. glauca, Cheeseman, P.Z.S., 1878, p, 277, pl. xv., 7. 4. Animal 
3-5 inch long; ovate, produced in front; entirely covered with 
numerous simple and branched appendages, the largest of which are 
