450 E. 31. Kindle — Bottom Control of Marine Faunas. 



and the character of sediments represented are shown in the 

 following list of stations : 



Collecting Stations. 



Sta, No. 1. Digby, N. S. Intertidal zone, bowlder strewn 

 beach. 



2. Digby, N. S. 300 to 400 yards east of Govern- 



ment pier in 2 fathoms. Soft black mud 

 bottom. 



3. Digby, N. S. 3 to 4 miles N.E. of Digby. 



Outer margin and inside of bar running S.W. 

 from Bear Island ; in 3 to 6 fathoms. Col- 

 lection nearly all from muddy sand. 



4. Bear Island, N.E. of Digby, N. S. 4 miles. 



Intertidal zone, bowlder strewn beach. 



5. Head of St. Mary's Bay, N". S. Intertidal zone. 



Beach of sand, gravel and mud. 



6. Kingsport, N. S. 1^- miles IST.E. of pier. Gravel 



bottom, shallow water. 



7. Kingsport, N. S. Channel opposite Kingsport 



pier ; 1 fathom at low tide ; sandy mud 

 bottom. 



8. Kingsport, N. S. Intertidal zone. Beach of 



rocks, gravel and muddy sand. (Living shells 

 in pools.) 



9. Kingsport, N. S. Beach of sand and mud be- 



tween tides. (Dead shells.) 

 10. Mouth of Avon River, opposite Chiverie, Pt. 

 N. S. 2 to 6 fathoms, rocky and sandy 

 bottom. 



The term intertidal zone is used here instead of littoral zone, 

 which was formerly in universal use for the zone between low 

 and high tide, because the latter term has in recent years been 

 used by Dall,* Grabauf and some others to include the marine 

 habitat down to depths of 100 fathoms. 



The dredging stations selected are all in shallow water, the 

 maximum depth being 6 or 7 fathoms at low tide. The loca- 

 tions are in each case near river mouths and subject to the 

 strong tidal currents heavily charged with sediment which are 

 characteristic of all the inlets and bays connected with the Bay 

 of Fundy. In all the essential elements which go to make up 

 the molluscan habitat at stations 2, 3, 6 and 10 there is very 

 little perceptible difference save in one respect.;}: The phys- 



* Deep Sea Molluscs and the conditions under which they exist. Proc. 

 Biol. Soc, Washington, vol. v, p. 3, 1888-90. 



f Principles of Stratigraphy, p. 646. 



\. Station 7 is omitted from the discussion following the list of species 

 because it lies within the limits of the brackish water belt. The shells 

 dredged there were with one or two exceptions dead shells and represent an 

 aggregation due to tidal currents which there have their maximum strength 

 in this mid chaunel in front of the mouth of Cornwallis River. 



