Contributions to Canadian biology . eds over cm. in length was that the beds were composed of young individualssince, as will appear, mussels frequently grow larger in that region. Description of the Miissel Beds of St. Andreivs Region in 1918. In 1918, in the St. Andrews region, it was found that the sea-mussel insteadof occurring in isolated patches about Passamaquoddy Bay now regularly formedpart of the fauna of its littoral zone. The large beds were located as previouslyand were in a thriving condition. The mussel had extended up the St. CroixRiver also as far as Oak Bay. On the ledges
Contributions to Canadian biology . eds over cm. in length was that the beds were composed of young individualssince, as will appear, mussels frequently grow larger in that region. Description of the Miissel Beds of St. Andreivs Region in 1918. In 1918, in the St. Andrews region, it was found that the sea-mussel insteadof occurring in isolated patches about Passamaquoddy Bay now regularly formedpart of the fauna of its littoral zone. The large beds were located as previouslyand were in a thriving condition. The mussel had extended up the St. CroixRiver also as far as Oak Bay. On the ledges about Dochet Island and along itsrocky shores the mussels were abundant, forming a bed of considerable mussels (as observed from a launch) appeared to be of the usual size andtype found in the beds of St. Andrews. (Owing to the United States war regula-tions re lighthouse property a sample was not obtained.) A trip to LEtang revealed that the mussels were common there and inBlack Harbour, but no large beds were found. Soo. O 1 2 3 1 J^mQpL inn ADXfrijjrrwijLAA Fig. I.—Frequency Curve of Mussels of various sizes in St. Andrews Region, 1917. 22 9 The mussels were always found as previously, occurring only in the littoralzone except in special locations such as anchor chains, which afford some pro-tection against certain of their enemies, , starfish. 2. DISTRIBUTION IN DIGBY REGION, NOVA SCOTIA. In August, 1918, I paid a short visit to Digby, Nova Scotia, with a viewto making a survey of the mussel beds in the Annapolis Basin. Owing to thedifficulty experienced in obtaining suitable boats for trips and the slowness withwhich one could proceed close inshore at low-water (due to the quantities ofeel-grass which infest the shore) it was found possible to visit only the beds closeto Digby, and one bed reported at Gulliver Hole, a few miles down the coastoutside the Basin. Through the co-operation of the Maritime Fish Corporation I was enabledto secure the guidance of t
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