ANIMAL RESOURCES AND FISHERIES OF UNITED STATES. 207 



used for implements, &c. 



Shells of Cypraed, Rotella, Olivet-, Turritella, Pliasianella (Venetian 

 shells), &c., mounted as buttons and jewelry. 1 



Composition shell-work for box-covers and frames, made by gluing 

 shells in mosaic. 1 



Calcined shells, used by dentifrice and porcelain makers. 1 (See, also, 

 under 32.) 



Cuttle-fish bone from Sepia officinalw, used as a pounce, as a denti- 

 frice, as polishing powders, for taking fine impressions in counter- 

 feiting, and as food for birds. 1 (See, also, under D 5.) 



Concretions from the stomach of Astacus, known as "crab's-eyes" 

 and " crab-stones," and used as antacids. 1 



Shell of king-crab (Limulus polypliemus), used as a boat-bailer. 1 



Opercula of mollusks, used as "eve-stones." 1 



17. COBAL. 

 Coral as a material* 



Red coral (CoraUlum nobilis), with specimens of the five commercial 

 grades (1, froth of blood; 2, flower of blood; 3, 4, 5, blood of first, 

 second, and third qualities) of the white variety, and of the round 

 beads, negligee beads, bracelets, pins, coronets, armlets, ear-rings, 

 &c. 1 



White coral, Oeulina, sp., used by jewelers. 1 



Madrepores and other showy corals, used for ornamental purposes. 1 



Horny axis of black flexible coral (Plcxaura crassa), used for canes 

 and whips in the Bermudas. 1 



Axis of iiui coral (Rhipidogorgia), used for skimmers and strainers 

 in the Bermudas. 1 



Cort:l, used for building purposes. 1 



Coral rock of recent formation (Coquina), used in Florida in manu- 

 facture of ornamental vases and carvings. 1 



Calcined coral, used for dentifrices, as an antacid, &C. 1 



Imitations of red coral in celluloid, rubber, and other substances. 1 



18. INFUSORIAL EARTHS. 



Polish! Big* powders (used for polishing metals, cabinet-ware, and 

 stone). 



Specimens of polishing slate, tripoli, and other foreign polishing 



powder. 1 

 Specimens of American infusorial deposits. 1 



1 See under Part II of this catalogue. 



