486 MOLLUSCA. 
Diameter about one-tenth of an inch. 
Taken in the equatorial Atlantic, and figured by Mr. Dana. 
The genus of this shell is also somewhat uncertain. It bears a 
resemblance to Sprriale rostrale, figured in the Bonite, pl. 13, f. 1, the 
Limacina inflata of Gray. 
Figures 602, 602a, lateral and longitudinal views of the shell and 
animal ; 602 0, natural size. 
Limactna (?) cucutiata (Gould). 
T. pellucida, planorboidea, altero latere anfractus quinque ostendens, 
altero anfractum unicum umbilicatum: apertura obliqua, campanu- 
lata, cucullata. 
AnimaL black, with ovate appendages, not intimately united at 
base. 
SHELL colourless, planorboid, on one side presenting about five or 
six whorls, on the other, a single volution, with a large, umbilical pit. 
Aperture oblique, campanulate, and projecting beyond the whorl like 
a hood. 
Diameter about one-fourth of an inch. 
Found near an ice-island, within twenty miles of the Antarctic con- 
tinent, lat. 66° S., long. 106° 20’ E. 
This is one of the few forms of the lower classes of animals obtained 
from the extreme South, and is, therefore, peculiarly interesting, 
although so imperfectly delineated. It is described from a pencil 
sketch by Mr. Agate. The genus is probably new, but must rank 
under Limacina, if among known genera. ‘The name Acapina might 
otherwise be employed. 
Figures 601, 601 a, 601 4, three views of the shell, with the animal. 
