TABLE OF CONTENTS. XIII 



V Page. 



259 



Crustacea piiyllopoda - i'V' 



A. Useful. Converted into fertilizers. Carapax used as a scoop or boat- ^_^ 



^^^^^^ .." 260 



Crustacea isopoda 



A. Useful; by removing wrecks or snags 



B. Injurious ; by destroying submerged timber ^^^ 



Crustacea stomatopoda 



Crustacea CECAPODA.-Lobsters, Shrimp, Crawfish, Crabs ^w 



A. Useful; food-supplying 



B. Commensal with other food supplies 



C. Injurious by burrowing into and weakening levees and dams ~bl 



D. Prepared foods ' 



ClERlPEDiA (injurious) ""T-" 7/ "11- "'•' ">V 



a. By dulling the edge of knives and spades employed in cutting m ^^^ 



whale blubber 



1). By obstructiug the progressicm of vessels upon which they affix them- ^^^ 



SGI \ Go ------ ---- ---- ---- ---• •--- -- or*o 



Annelida.— Worms and Leeches 



A. Useful „g.2 



1. In surgery and medicine 



2. For bait in fishing " 



3. For food " 



. ... 2d^ 



B. Injurious 2„^ 



1. By boring into and destroying oyster-shells ^^^ 



KADXATES.-Sea-Urchins, Starfish, Corals, Medusae, etc '^^^ 



A. Useful ~ 2 



1. Food-producing ~" 



B. Injurious 2go 



1. Destroying oysters, clams, &c ■.""■,*'"■" 



2. By their m-ticating powers aiuioying bathers and "fouling nets 



and fishing lines with slime— various acalephs 



. 263 



Protozans.— Sponges, etc ^^^^^ 



Useful 



1. For conveyance of fluids requiring an elastic and temporary men- ^^^ 



struum, and as a detergent 



2. Useful as an elastic medium or absorbent 



.. .... . 2b4 



Injurious ,-,g^ 



1. By destroying oysters ~^^ 



ElIlZOPODS 



MISCELLANEOUS PRODUCTS OF SEA OR SHORE, NOT OF AN ANIMAL 



NATURE. 



264 



a. Lichens ^q^ 



h. Algaj 265' 



1. Having economical applications 



2. Ornamental algai 



Inorganic materials 



263 



