SINGLE-SHELLED MOLLUSKS. 63 
Cowries, or Egg-Shells (Cypreade).—The Cowries 
(Fig. 66, C), called in Florida micramocs, have richly enam- 
eled and marked shells; the spire is not seen, and the 
opening is small. When living they throw out a coating 
that completely covers the shell, protecting it from damage. 
Fic. 66.—Flesh-feeding mollusks. W, whelk; E, whelk-eggs; C, cowry: 
v, operculum ; z, notch in shell; sz, siphon; /, foot; s, head. 
VALUE.—The Cyprea moneta is used as money in some parts of 
Africa. In 1848 60 tons of this money was sent out. 
AEE EE, LECT EGEE ae 
SAEBHIEESUG Tbe gate 
auth ees ee VERE 
l 
sErre. 
* t 
TP 
S Sth yy oe 
Ves 
ee ire 
Sz 
Fic. 67.—Toothed tongue of Buccinum undatum. B, one of the transverse 
rows enlarged ; /, lateral teeth. 
Whelks (Succinide). — Nearly 1,100 living species 
have been found ; many are common on our shores. The 
shell has few. whorls, and the operculum is long or ovate 
(Fig. 66; W, 0). In some the tongue is long and contains 
