TABLE OF CONTENTS. XIII 



Page. 



Crustacka PIIYI.LOPODA 259 



A. Useful. Converted into fertilizers. Carapax xiseil as a scoop or boat- 

 bailer 259 



Crustacea isopoda 200 



A. Usefnl ; by removing wrecks or suags 260 



B. Injui'ioiis ; by destroying submerged timber 260 



Crustacka stomatopoda 2G0 



Crustacea decapoda. — Lobsters, Shrimp, Crawfish, Crabs 260 



A. Usefnl ; food-snpply ing 260 



B. Commensal with other food supplies 2(51 



C. Injurious by burrowing into and weakening levees and dams 261 



D. Prepared foods 261 



CiRRlPEDiA (injurious) 262 



a. By duUing'tho edge of knives and spades employed in "cutting in" 



whale blubber 262 



h. By obstructing the progression of vessels ui)on which they affix them- 

 selves 262 



Anxeoda. — Worms and Leeches 262 



A. Useful 262 



1. In surgery and medicine 262 



2. For bait in iishing 262 



3. For food 262 



B. Injurious 262 



1. By boring into and destroying oj'ster-shells 2(J2 



Radiates.' — Sea-Urchins, Starfish, Corals, Medusae, etc 2;^)2 



A. Useful 262 



1. Food-producing 282 



B. Injurious 26:i 



1. Destroying oysters, clams, &c 263 



2. By their urticating powers annoying bathers and "fouling" nets 



and fishing lines with slime — various acalephs 263 



Protozajxs. — Sponges, etc 263 



Useful 263 



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



struum, and as a detergent 263 



2. Useful as an elastic medium or absorbent 264 



Injurious 264 



1. By destroying oysters 264 



Ehizopods 264 



MISCELLANEOUS PRODUCTS OF SEA OR SHORE, NOT OF AN ANIMAL 



NATURE. 



a. Lichens 264 



b. AlgiB 265 



1. Having economical applications 265 



2. Ornamental algui 265 



Inorganic materials 271 



