ENUMEKATION OF ANIMALS. 19 



XIII. MOLLUSKS. 



57. CEPHALOPODA. (Octopus, nautilus, argonauts, calamaries or 



squids.) 

 Useful 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. GASTKOPODA. (Laud-snails, sea-snails, whelks, limpets, &c.) 



Useful products : 



Food, (numerous species.) D. 1, 2. 



Bait, (limpets, &c.) 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, &c.) 



Injurious to vegetation. 



59. CONCHIFERA. (Ordinary bivalve shells. 1 ) 



Useful products : 



Food, fresh, dried, and pickled, (numerous species.) D. 



1, 2, 3. 

 Baits, (clams, mussels, &c.) D. 5. 



Pearls and nacre, (river-mussels, pearl-oysters, &c.) D. 15. 

 Shell used in arts and manufactures. D. 16. 

 Injurious traits : Borers in wood and stone, (ship-worms, pholas 

 gastrochaena, date, shells, saxicava, ungulina, &c.) 



XIV. RADIATES. 



60. ECH1NODERMATA. (Sea-eucumber, sea-urchins, star-fishes, ophi- 



urans.) 

 Useful products : 



Food, fresh, (sea-urchins and their eggs.) D. 1. 



Food, dried, (bechesle mer.) 



1 Tunicata, brachiopoda, and bryzoa are omitted, on account of their very remote 

 usefulness. 



