ANIMAL RESOURCES AND FISHERIES OF UNITED STATES. 207 



Shells i]§ed for iBMpleBncnt§, &c. 



Shells of Cypraea, Rotella, OUva^ Turritella, PliasianeUa (Venetian 

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



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

 shells in mosaic.' 



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

 under 32.) 



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

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

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



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

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



Shell of king-crab {Limulus polyphemtis), used as a boat-bailer.^ 



Opercula of mollusks, used as "eye-stones."^ 



17. COBAL. 



Coral as a material. 



Ked coral {Cor allium noMlis), 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, 

 i&c' 



White coral, Oculina, sp., used by jewelers.^ 



Madreijores and other showy corals, used for ornamental purposes.' 



Horny axis of black flexible coral [Plcxaura crasoa), used for canes 

 and whiles in the Bermudas.' 



Axis of fan coral {Bhipidogorgia), used for skimmers and strainers 

 in the Bermudas.' 



Coral, used for building purposes.' 



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

 facture of ornamental vases and carvings.' 



Calcined coral, used for dentifrices, as an antacid, &c.' 



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



18. Infusorial earths. 



Poli§hiBig powders (used for polishing metals, cabinet-ware, and 



stone). 



Specimens of polishing slate, tripoli, and other foreign polishing 



powder.' 

 Specimens of American infusorial deposits.^ 



' See under Part II of this catalogue. 



