GASTEROPODA. 341 
Figures 441, 441 a, 441 6, three views of the shell. 
PareLLA CyMBULARIA (Lamarck), Anim. sans Vert., vil. 541. Les- 
son; Voy. de la Coq., 422. P. mytilina, Scuus. and Waen.; Supp. 
Martini, f. 4052. P. cymbuloides, D’Ornicny; Voy. dans |’ Amer. 
Merid. 
Antmav. “Head very small and projecting, almost proboscidiform ; 
tentacles long and rather stout; eyes extremely minute, near external 
base. Foot very regularly oval, rather broader anteriorly; mantle 
furnished with twelve prominent, retractile cirrhi, convex on the upper 
and flattened on the lower side; between each of which are three 
shorter and slender cirrhi. All these marginal cirrhi are constantly in 
motion, and it was observed that they corresponded in position to the 
sinuosities of the margin of the shell. Branchie in the form of a very 
narrow fringe, surrounding the body between the foot and the mantle, 
and hardly perceptible. Colour of head and tentacles pale brown; 
mantle the same colour, with a tinge of purple added ; larger marginal 
cirrhi tinged with purple at the base, the others yellowish, as are also 
the branchiz ; the foot is pale slate-colour in the middle, and yellowish 
at margins. It appears finely granulated under a lens.” [J. Pp. c.] 
Found on a floating Fucus, in lat. 47° 80’ S., long. 60° W. 
Figure 442, the animal and shell, from below; 442a, profile of the 
shell. 
PATELLA DEAURATA (GMELIN), in Chemn. Conch., x. tab. 168, f. 
1616, a, b. P. Magellanica, Gmeu.; Chemn. Conch., i. tab. v. f. 40, 
a,b. P. fusca, Dituwyn ; Catal., 11. 1047. 
The varieties of this shell are so numerous that several species 
might easily be designated from them. The aperture is either 
oval or ovate, the long diameter being to the short diameter, varying 
from 23 : 20, toll : 5. In altitude compared with its long diameter 
it varies as 3 : 4, to4 : 11; the elongated, narrow varieties being 
generally most depressed. In some, the apex is nearly central, and is 
acute. this is the case with those which have the aperture nearest 
approaching to circular, and also the greatest altitude, so that the shell 
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