264 ANIMAL RESOURCES AND FISHERIES OF UNITED STATES. 



3183-90. Ditto. (Cleansed.) {S. tuhuVifera, var. discifomiis, Hyatt.) 



Florida Keys and Bahamas. Isaacs «fc Co. 

 3192-9G. Ditto. {S. gossijjyhia, D. & M., var. Mrmta.) Florida Keys and 



Bahamas. Isaacs & Co. 

 3197. Ditto. {S. (joHsypma, var. dcndritica.) Florida Keys and Bahamas. 



Isaacs & Co. 

 3198-3202. Ditto. (;S'. (/tfs^tcjMJm, var. jwrosa.) 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 stuffing cushions and packing. Florida. Jas. Richard- 

 son. 



3212a. Ditto. Frcpared for stuffing cushions, mattresses, «&c. Florida. 

 Wm. B. iloses, Washington, D. C. 



Injurious : 



1. By destroying oysters : 



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

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

 mission. 



32979. Boring sponge. Shells of Pecteu. showing ravages. Castiue, Me. A. 



R. Crittenden. 



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



32820. Ditto. Showing efiect on oyster-shell. Now York Bay. B. J. M. 

 Carley. 

 3147. Ditto. Showing various stages in shell. Shrewsbury 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 menstrutim for nitro-glycerine, in the manufacture of 

 djmamite and other explosives ; and also in the manufac- 

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

 in nearly all cases is the contained silica. 



MISCELLAIS^EOUS PEOJDUCTS OF SEA OR SHORE, KOT OF 

 AN ANIMAL NATURE. 



Plants: 



a. Lichens: 



293ir). Orchilla {liOcvUa iinctorla), in its natural condition as gathered from 



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



A. Ross & Bro., Now York. 

 29313. "Archil litjuor," derived from Orchilla, and extensively used as a dyc- 



stulf. West coast of North America. W. A. lioss &, Bro., Now 



York. 



