264 ANIMAL RESOURCES AND FLSHERIES OF UNITED STATES. 



3189-90. Ditto. (Cleansed.) (S. hibuViftra, var. disciformis, Hyatt.) 



Florida Keys and Bahamas. Isaacs &, Co. 

 3192-9G. Ditto. {S. fiossypina, D. ifc M., var. hirsuta.) Florida Keys and 



Bahamas. Isaacs & Co. 

 3197. Ditto. (S. gossypina, var. dendntica.) Florida Keys and Bahamas. 



Isaacs & Co. 

 3198-3202. Ditto. (S. gossyjntmjXar. ptorosa.) Florida Keys and Bahamas. 



Isaacs & Co. 



2. Useful as an elastic medium or absorbent: 



3213a. Sponge prepared for use as lint in surgery. Wm. B. Moses, Wash- 

 ington, D. C. 



3211. Ditto. For stiaffing cushions and packing. Florida. Jas. Richard- 

 son. 



3212rt. Ditto. Prepared for stuffing cushions, mattresses, &c. Florida. 

 Wm. B. Moses, Washington, D. C. 



Injurious: 



1. By destroying oysters : 



3215. Boring sponge {Cliona aulplmrea, Verrill). Mature form, after oyster- 

 shell has disintegrated. Vineyard Sound, Mass. U. S. Fish Com- 

 mission. 



32979. Boring sponge. Shells of Pecten showing ravages. Castine, Me. A. 



R. Crittenden. 



32980. Ditto. Castine, Me. L. J. Heath. 



32820. Ditto. Showing effect on oyster-shell. New York Bay; B. J. M. 

 Carley. 

 3147. Ditto. Showing various stages in shell. Shrewsbmy River, N. J. 

 B. J. M. Carley. 



Rhizopod§. 



Useful; the fossil forms being largely employed as a polishing 

 powder under the name of "Tripoli" or "infusorial earth"; 

 as a menstruum for nitro-glycerine, in the manufacture of 

 dynamite and other explosives ; and also in the manufac- 

 ture of " stone china" and pottery. The valuable quality 

 in nearly all cases is the contained silica. 



MISCELLANEOUS PEODUCTS OF SEA OR SHOEE, NOT OF 

 AN ANIMAL NATUEE. 



Plants: 



a. Lichens: 



29310. Orchilla (Eocella tinctoria), in its natural condition as gathered from 

 rocks and branches of plants. West coast of North America. W. 

 A. Ross & Bro., New York. 



29313. "Archil liquor," derived from Orchilla, and extensively used as a dye- 

 stuff. AVcst coast of North America. W. A. lioss «fc Bro., New 

 York. 



