59 
2. Mollusca acephala or bivalve shells, viz. room viii 
pholas or borer; gastrochsena; saxiclava or rock- 
eater; solen or razor-shell; anatina; pandora ; san- 
guinolaria; mactra; lembulus or boat-shell; cyclas 
or river-cockle; tellina or telline; psammobia or 
sand-shell; donax or wedge-shell; capsa; Venus, 
of which Dione is the most remarkable; loripes 
or strap-foot; lucina; cardium .or cockle: isocar- 
dia or heart-shell; hij)popus or horse-foot; tridac- 
na or clamp; etheria; chama; pectunculus or pec- 
tuncle; unio or river pearl-shell; dipsas; anodonta 
or horse-muscle; area or ark;' margarita or pearl- 
shell; avicula or bird-shell; malleus or hammer- 
oyster, the black and the white species; perna; li- 
thodomus or stone-house; modiola; mytilus or 
muscle; pinna or nacre; lima; pecten or comb- 
shell ; spondylus or thorny-oyster; plicatula; os- 
trea or oyster, the cockscomb, tree, horn of plenty, 
and Virginian oysters are the most remarkable; 
placuna or pancake-shell, of one of the species of 
which the Chinese sometimes make windows; 
anomia. 
3. Mollusca hrachiopoda, such as lingula or 
duck-shell; . the orbicula ; the cranium or skull- 
shell ; and terebratula, of which there are a vast 
number of fossil species in Room IX. 
Table 31 contains specimens of limestone, coral, 
and wood, perforated by lythodomi, pholades, and 
by the teredo navalis, or ship-w’orm; pearl-shell of 
commerce. 
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