Beginners' zoology . S ZOOLOGY Bulletins on Similar Topics, Published by the Depart-ment of Agriculture, Ontario—•(Write to the Publications Branch) 187—The Codling Moth195—The Insecticides and Fungicides198—Lime Sulphur Wash219—The San Jose and Oyster-shell Scales241—Peach Growing in Ontario250—Insects Attacking Fruit Trees251—Insects Affecting Vegetables256—The Wintering of Bees257—The More Important Fruit TreeDiseases in OntarioBulletin No. 258—The More Important Fungus and Bacterial Diseases of Vegetables in OntarioBulletin No. 271—The Apple MaggotBulletin No. 276—Bee Diseases in Ontario B
Beginners' zoology . S ZOOLOGY Bulletins on Similar Topics, Published by the Depart-ment of Agriculture, Ontario—•(Write to the Publications Branch) 187—The Codling Moth195—The Insecticides and Fungicides198—Lime Sulphur Wash219—The San Jose and Oyster-shell Scales241—Peach Growing in Ontario250—Insects Attacking Fruit Trees251—Insects Affecting Vegetables256—The Wintering of Bees257—The More Important Fruit TreeDiseases in OntarioBulletin No. 258—The More Important Fungus and Bacterial Diseases of Vegetables in OntarioBulletin No. 271—The Apple MaggotBulletin No. 276—Bee Diseases in Ontario Bulletin No. Bulletin No. Bulletin No. Bulletin No. Bulletin No. Bulletin No. Bulletin No. Bulletin No. Bulletin No. Bulletins Published by the Department of Agriculture,Ottawa—(Write to the Publications Branch) Bulletin No. 9—The Army WormBulletin No. 10—Cutworms and their ControlBulletin No. 26—Bees and How to Keep ThemCircular No. 9—1921—Common Garden Insects andtheir Control. Pearl divers. CHAPTER IX MOLLUSCS The Fresh-water Mussel Suggestions. — The mussel is usually easy to procure fromstreams and lakes by raking or dredging. In cities the hard-shelled clam, or quahog, is for sale at the markets, and the follow-ing descriptions apply to the anodon, unio, or quahog, withslight changes in regard to the siphons. Mussels can be keptalive for a long time in a tub with sand in the bottom. Pairs ofshells should be at hand for study. External Features. — The shell is an elongated oval,broader and blunter at one end (Fig. i88). Why doesthe animal close its shell. Does it open the , Does it thrust the foot forward and pull up to it,or thrust the foot back and push ? (Mussels and clamshave no bones.) Does it go with the blunt end or the moretapering end of the shell forward. (Fig. i88.) Can amussel swim .? Why, or why not 1 97 98 BEGINNERS ZOOLOGY
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