GASTEROPODA. 221 
The form and colouring of this shell is so constant, that I hesitate 
not to regard it as a distinct species, under the name which it bears 
in the work of Martiniand Chemnitz. It is smaller and more globose 
than B. ampulla, and constantly bears the two dark bands dividing 
the surface into three nearly equal zones. 
It was dredged at the Feejee Islands, in from three to six fathoms 
water. 
ANIMAL nearly colourless above, tinted blue and flesh-colour; form 
elongated ; mantle covering about one-third of the shell; head obtuse, 
in front bilobed, with tentaculiform appendages at each angle; eyes 
at base, quite distinct; behind these are two long, lanceolate appen- 
dages, reaching back upon the shell, half the length of the animal. 
The size of the tentacles in the figure would seem to be exaggerated, 
though the animal of B. aplustre is represented by Quoy with two pairs 
of similar ones. 
Figure 264, the animal, with the shell. 
BuLua RuBIGINOSA (Gould). 
Testa B. amygdalo similima, sed incola valdé differt: ellipsoidea, 
solidula, cinerascens nigro-nubeculata, sepius ferrugineo deluta. 
Bulla rubiginosa, Gouin ; Proceed. Boston Soc. Nat. Hist., iii. 107. 
April 1849. 
ANIMAL with the head flat, compressed, bilobed in front, the lobes 
semicircular, with a deep fissure between, on each side of which, in 
a small circular depression and rather remote, are the eyes; poste- 
riorly the head is furnished with two thin, prolonged, sub-triangular 
lobes. The mantle is very narrow, hardly surpassing the edge of the 
shell. The colour of the body is light ochreous, powdered, as it were, 
with black. Its motions were sluggish. [J. Pp. c.] 
The general contour of the shell is like that of Bulla amygdalus, 
with which it has doubtless been confounded. 'The animal, however, 
is very different. In general, the surface was either eroded or covered 
56 
