198 PECTINIBRANCHIATA.—TURBINIDA. 
keeping its body contracted within the shell. 
Though I have kept many specimens, I have 
never seen one crawl. 
FAMILY TURBINIDZ. 
(Winkles.) 
An immense assemblage of species, some of 
which are of large size and great beauty, is com- 
prised in this family. The animal is spiral, with 
the sides occasionally ornamented with tentacular 
appendages differmg in number and form; the 
head is protruded somewhat in the form of a pro- 
boscis, furnished with slender thread-like tentacles; 
the latter carry at their bases’a pair of eyes, usually 
raised on footstalks; the mouth has no tooth on 
the lip, but is provided with a ribbon-shaped tongue 
of great length, rolled up spirally when not in use, 
and carried in the cavity of the body. A furrow 
passes across the foot near its front border; the 
gills consist of two fringes. 
The shell is thick and solid, often more or less _ 
pearly on the inside, forming a spiral cone, with 
the opening round or slightly depressed. ‘There is 
an operculum, which is calcareous (shelly) in some 
species, horny in others; in the latter the spiral 
formation is visible on the outside, in the former 
on the inside. 
All the members of this family are believed to 
be vegetable feeders, subsisting on the sea-weeds, 
the substance of which they rasp down by the 
action of their rough tongue. Yet the large and 
beautiful Phastanella bulimoides, an Australian 
species assigned to this family, is said by MM. 
Quoy and Gaimard to be taken in nets baited with 
flesh, and let down into the sea. 
