GASTEROPODA. 371 
motion. Mantle furnished with numerous short, filiform cirrhi. Bran- 
chial tubes ten on each side, obtusely conical, distant, surrounding the 
foot except anteriorly. 
Several specimens were brought up on the cable in Scapenham 
Bay, Cape Horn. [3. p. c.] 
The shell agrees sufficiently well with the description given by 
D’Orbigny, though it is not quite certain to be the same species. 
But the description of the animal is principally important, inasmuch 
as it has not as yet been accurately observed and figured. From the 
above description, and from that of the succeeding species, a good 
idea of the generic characters of the animal may be derived. 
Figure 477, the animal, from beneath, magnified; 477 a, 477, 
superior and inferior views of the head, magnified ; 477 c, the shell, in 
profile ; 477 d, natural size ; 477 e, sculpture, magnified. 
Rimvuta coenata (Gould). 
Testa conica, alba, radiatim costulata ; apice incurvato; apertura ro- 
tundato-ovalis. 
ANIMAL having a general resemblance to that of Patella, but more 
elongated, and, in addition to the usual number of tentacles, has 
two short conical ones projecting laterally from the posterior base of 
the regular ones. Eyes distinct, at the lower third of the tentacles. 
Mantle fringed with cirrhi. Branchie placed between the foot and 
the mantle, extending around the foot, in the shape of sparse conical 
tubes, somewhat resembling the branchial leaflets of Chiton, fourteen 
or more on each side. Fecal matters ejected from the vertical fis- 
sure. ‘Tentacles constantly in motion, switching to and fro. Motions 
rapid. [yJ.P.c.] 
SHELL small, conical, with the apex curved, and the surface orna- 
mented with radiating ribs of nearly uniform size; aperture rounded 
oval. Colour ashy-white. 
Dredged in sixteen fathoms water, Orange Harbour. 
