MUSSELS AND SNAILS. 
167 
The Argonaut. Some Fabulous Monsters of the Sea. 
Oyster Farming. Pearl Fisheries. Famous Pearls. 
The Ship-worm. Wampum and Suckanhock. The 
Scallop. 
VOCABULARY. 
Ad duc'tor (Lat. ad , to, and duco, 
lead), a word applied to the 
muscles which hold together the 
shells of bivalves. 
An'o don (Gr. a, priv., and -odous, a 
tooth), a genus of fresh-water 
mussels having no hinge-teeth. 
Bi'valve (Lat. bi, two, and valva , 
a leaf of a door), having two 
shells which open and shut. 
Bran'chia (Gr. branchia, gills, pi. 
of branchion, a fin), gills. 
Bys'sus (Gr. byssos , a kind of flax), 
a bunch of tough threads by 
means of which some bivalves 
attach themselves to rocks. 
Carniv'orous (Lat. caro , flesh, 
and voro , to devour), flesh-eat- 
ing. 
Columel'la (Lat. dim. of colu¬ 
men, a column), the upright pil¬ 
lar in the axis of a univalve shell. 
Dex'tral (Lat. dexter , right), 
right-handed, 
Epider'mis (Gr. epi , upon, and 
derma , skin), the outer skin of an 
animal. 
Her biv'o rous (Lat. herba , grass, 
and voro , to devour), vegetable¬ 
eating. 
Hinge Lig'ament (Lat. ligo, to 
bind), an elastic substance forc¬ 
ing open bivalve shells when the 
muscles relax. 
Lin'gual Rib'bon (Lat. lingua , 
tongue), a rasp-like organ used 
in boring holes through shells. 
Man tie (Lat. manus , hand, and 
tela , a web), the soft outer cover¬ 
ing of the body of a mullusk, 
commonly just under the shell. 
Na'cre, mother of pearl. 
(E soph'a gus (Gr. oiso , will bear 
and phagein , to eat), the tube 
leading from the mouth to the 
stomach. 
0 per'cu lum (Lat. operculum , a 
lid), the lid closing the aperture 
of a snail’s shell. 
Pal'lialLine (Lat. pallium, a man¬ 
tle), the mark on the inside of a 
mollusk-shell made by the man¬ 
tle. 
Se'tae (Lat. pi. of seta , a bristle), 
bristles. 
Sin'is tral (Lat. sinister, left), left- 
handed. 
Si'phon (Gr. siphon, a siphon), a 
tube for passing water through 
the gill-cavity of* a mollusk. 
Su'pra ce soph a ge'al (Lat. supra , 
above, and oesophagus ), an ad¬ 
jective applied to the ganglion 
above the throat. 
Umbil'icus (Lat. umbilicus , 
navel), an opening near the cen¬ 
tre of the base of some spiral 
shells. 
Um'bo (Lat. umbo, the boss of a 
shield), a prominence near the 
hinge of a bivalve shell. 
Un'io (Lat. unus, one), a genus of 
fresh-water mussels. 
Whorl, one turn of the spire of a 
univalve shell. 
