ENUMERATION OF ANIMALS. 19 
XIII. MOLLUSKS. 
57. CEPHALOPODA. (Octopus, nautilus, argonauts, calamaries or 
squids.) 
Usefal products: 
Food, (squids and their eggs.) D.1. 
Bait, fresh and salted, (octopus, squids.) D. 1, 5. 
Ink, sepia, (sepias.) D. 29. 
‘‘ Bone,” used as food for animals. D. 5. 
“‘ Bone,” used in arts and manufactures. D. 19. 
58. GASTROPODA. (Land-snails, sea-snails, whelks, limpets, &¢.} 
Useful products: 
Food, (numerous species.) .D. 1, 2. 
Bait, (limpets, &e.) D. 5. 
Nacre, (top-shells, ear-shells, &c.) D. 15. 
Shell used in arts and manufactures. D. 16. 
‘Useful traits: 
Carrion-feeders, (strombus and other siphonated genera.) 
Food of useful animals. 
Injurious traits: 
Predatory on other mollusks, (murex, buccinum, natica, &¢.) 
Injurious to vegetation. 
59. CONCHIFERA. (Ordinary bivalve shells.') 
Useful products: 
Food, fresh, dried, and pickled, (numerous species.) D. 
1, 2m 
Baits, (clams, mussels, &c.) D. 5. 
Pearls and nacre, (river-mussels, pearl-oysters, &c.) D. 15. 
Shell used in arts and manufactures. JD. 16. 
Injurious traits : Borers in wood and stone, (ship-worms, pholas, 
gastrochena, date, shells, saxicava, ungulina, &c.) 
XIV. RADIATES. 
60. ECHINODERMATA. (Sea-cucamber, sea-urchins, star-fishes, ophi- 
urans.) 
Useful products : 
Food, fresh, (sea-urchins and their eggs.) D. 1. 
Food, dried, (béches le mer.) 
1 Tunicata, brachiopoda, and bryzoa are omitted, on account of their very remote 
usefulness. 
