GASTEROPODA. ah 
AnImAL nearly colourless, except the anterior portion of the foot, 
which is a rich ultramarine blue; the proboscis has a fainter shade of 
the same, communicating its shade to the transparent sheath; its tip 
is flesh-coloured, and armed with numerous fine bearded sete, with 
which it was seen to seize animalcules for food. Tentacles only two, 
each one having, about one-third from the base on the side next the 
foot, a short spur, like a second tentacle. Eyes very small, but dis- 
tinctly seen just behind the base of the tentacles. 
Its float is about one and a half diameters of the shell in length, 
narrow, most elevated near its attachment, but not much elevated any- 
where, tapering backwards. Vesicles small, not imbricating, but 
alternating with each other. The animal did not reconstruct its float 
when retained under water, but commenced it immediately when 
raised to the surface. [J. Pp. c.] 
Found in lat. 18° 20’ S., long. 132° W., 150 miles from land. 
Figure 272, lateral view of the shell containing the animal; 272a, 
buccal barbs, enlarged. 
Figure 273 represents the animal of the common Janthina (J. 
Sragiis), which is unaccompanied by a description, but which is given 
because it seems to be more lifelike and more in detail than any one 
hitherto published. 
PyRULA DEFoRMIS (Lamarck), Anim. sans Vert., ix. 520. Purpura 
abbreviata, var. KiENER. 
ANIMAL small, pale lemon-yellow ; foot small, escutcheon-shaped, 
anterior border a little dilated; head narrow, with the tentacles stout 
at base, short subulate ; eyes nearest the tip; siphon not protruding. 
Found at Tutuilla, Samoa Islands. 
Figure 276, small variety of the shell, with the animal. 
Fusus Geverstanus (Paxtas), Spic. Zool., pl. 3, fig. 1. Buccinum 
