PATELLID. 107 
anterior margin widely truncated, very slightly sinuated ; anterior area 
broad, smooth (Reeve.) 
Auckland to Dunedin. 
For the dentition of this species, see Hogg, Trans. Royal Micros. 
Soc., 1866 (in the Quart. Jour. of Micros. Science,) pl. 12, f. 57. Reeve 
considers that P. australis is the same as P. elongatus, Blainville, from 
Australia. 
DIvIsloN—CyYCLOBRANCHIATA. 
Gill lamellar, on the inner surface of the mantle, forming a more or 
less complete ring just beneath the margin. Radula with no middle 
plate, and ridged lateral and intermediate plates. Side of foot with a 
sunken groove. Shell conical, symmetrical. 
FAMILY—PATELLID. 
Mouth with horny jaws; radula very long; teeth in numerous 
transverse rows (2. 4. 2.,) central two pairs; lateral two on each side, 
the inner one larger and lower down; uncini three. Head with a short 
muzzle; tentacles subulate, with the eyes on the outer side of the 
swollen base. Mantle margin fringed. Operculum none. Shell simple, 
conical ; muscular impression crescentic, interrupted in front. 
Genus, PATELLA—Linneus. 
Mouth emarginate below ; gills extending round the body, inter- 
rupted on one side near the neck. Shell orbicular or oval ; apex sub- 
central, inclined anteriorly ; aperture wide, the margin entire or spinose, 
simple within. : 
P. magellanica, Martyn, Reeve, Conch. Ic., f- 19. Shell ovate, 
pyramidally concave, very high, radiately ribbed; ribs rather broad, 
rude, absoletely bluntly tubercled ; ash-brown, ribs darker, blotched 
with black ; interior ash-tinged (Reeve.) 
Length, 2? inches. 
Straits of Magellan. Auckland Island. Campbell Island. Ker- 
guelen’s Land. Doubtfully identified. 
P. inconspicua, Gray, Dieff. N.Z., ii., p. 244. Shell conical, 
oblong, with about twenty radiating ribes; the apex erect; disk white, 
rather greenish under the tip. 
Length 14 inches. (Gray.) 
Wellington. Dunedin. 
Probably a small variety of the last 
P. redimiculum, Reeve, Conch. Ic., f- 50; Voy. Erebus and 
Terror, pl. 1, f 24; P. radians, Reeve, lc, f- 253 LP. pottst. Hutton, 
CM.M., p. 44. Shell ovate, moderately convex; apex very much 
inclined anteriorly, radiately ribbed; ribs rounded, rather distant, 
obsoletely nodose, front ribs very short; olive-ash ; nbs more or less 
