GASTEROPODA. 243 
low, just above which is a submarginal, blackish line. Foot oblong, 
rounded behind, and with a transverse submarginal furrow in front; 
colour of the disk pale fleshy tint, passing into yellow at the margin. 
Head prolonged, narrow; with a cup-shaped extremity, within which 
is the vertical aperture of the mouth, surrounded by the true lips. 
Tentacles elongate, compressed, obtuse, yellowish-brown at base and 
summit, with a dark spot between the eyes and tip; eyes on an enlarge- 
ment at their lower third. Siphon short, slightly protruding. [(s. Pic.j] 
Found at Orange Harbour, Tierra del Fuego. 
Figure 301, the animal, with the shell, as in motion; 301 a, disk of 
the foot ; 301 4, animal of the variety. 
RANELLA VENTRICOSA (BropERIP), Proceed. Zool. Soc. Lond., 1832, 
178. Desuayes; ed. Lam. An. sans Vert., ix. 555. Kuener, Sow- 
ERBY, &c. 
Anima ochreous, marbled with bronze-green; plantar surface paler, 
slightly mottled. Siphon large, widely expanded at the extremity, 
which is not truncate. Eyes about the middle of the tentacles, the 
terminal portion of the tentacles annulated with white at the middle 
and tip. From the mouth an enormous trompe, nearly as long as the 
foot, is protruded, which is trumpet-shaped at its extremity, within 
which is a finger-like process, through which the canal opens. Verge 
enormous. [J. P. c.] 
The animal is more like that of some Purpure, than like that of 
true Ranella. It is in all respects like that of P. chocolatta, and the 
shells have the same posterior, pleurotomoid emargination of the lip, 
the broad-spread siphon, and the same form of tentacles, and the 
mouth is vertical, situated at the bottom of a cup formed by the lip 
of the proboscis, the upper portion of which may be extended like a 
hood. The tentacles of the latter species are very badly represented 
in the Voyage of the Bonite. 
Figure 302, the animal, as in motion, with the shell in outline; 302 a, 
the verge in outline. 
