THE ECONOMIC MOLLUSCA OF ACADIA. 
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:3. As fertilizers. See Ostrea Virginiana. 
Mytilus edulis. 
Modiola plicatula. 
Ommastrephes illecebrosa. 
Loligo Pealei. 
4. For ornaments, including pearl. 
See Margantana. 
Venus mercenaria. 
Mytilus edulis. 
Modiola modiolus. 
Cardium Islandicum. 
Pecien tenuicostatus. 
Mactra solidissima. 
Buccinum undatum. 
Pus us Islandicus. 
Pusus decemcosiatus. 
5. For money. See Venus mercenaria. 
*6. For dyes. See Purpura- lapillus, 
Buccinum undatum. 
7. For dishes and minor uses. 
See Ostrea Virginiana. 
Pecten tenuicostatus. 
Mactra solidissima. 
Mytilus edulis. 
(b) Indirectly useful. 
(1) As food for fishes. See Introduction of this paper, p. 15. 
(2) Protection of coasts from erosion, etc. 
See Mytilus edulis. 
Modiola modiolus. 
(3) Removal of wrecks and obstructions to navigation. 
See Teredo navalis. 
(4) Of value to oyster beds. See Littorina litorea. 
B. Injurious Mollusca. 
(a) Directly injurious. 
1. Destructive to sub-marine timber. 
See Teredo navalis. 
Teredo norvagica. 
Teredo dilaiata , 
Xylophaga dorsalis. 
