TABLE OF CONTEXTS. XIII 



Page. 



CRUSTACEA PHYLLOPODA 259 



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

 bailer 259 



CRUSTACEA ISOPODA 260 



A. Useful; by removing wrecks or snags 260 



B. Injurious; by destroying submerged timber 260 



CRUSTACEA STOMATOPODA 260 



CRUSTACEA DECAPODA. Lobsters, Shrimp, Crawfish, Crabs 260 



A.. Useful; food-supplying 260 



B. Commensal with other food supplies 261 



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



D. Prepared foods 261 



CIRRIPEDIA (injurious) 262 



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



whale blubber 262 



&. By obstructing the progression of vessels upon which they affix them- 

 selves 262 



ANNELIDA. Worms and Leeches 232 



A. Useful 262 



1. In surgery and medicine 262 



2. For bait in fishing 262 



3. For food 262 



B. Injurious 262 



1. By boring into and destroying oyster-shells 262 



RADIATES. Sea-Urchins, Starfish, Corals, Medusae, etc 262 



A. Useful 262 



1. Food-producing 262 



B. Injurious 263 



1. Destroying oysters, clams, &c 263 



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



and fishing lines with slime various acalephs 263 



PROTOZANS. Sponges, etc 263 



Useful 263 



1. For conveyance of fluids requiring an elastic and temporary 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. Algae 265 



1. Having economical applications 265 



2. Ornamental algae 265 



INORGANIC MATERIALS 271 



