THE NAUTILUS. 83 



Muscidium transversum Prime. South Bend, Cass Co., and "VVood- 

 lawn Creek, Lincoln. 



Muscidium secure Prime. Lincoln. 

 Pisidium Sp. ? Omaha. 

 Lampsilis hiteolus Lam. Blue River, Crete. 

 Lampsilis parvus Bar. Lincoln. 

 Lampsilis subros'ratus Say. Lincoln. 

 Unio tetralasmus Say. Lincoln. 

 Anodonta grandis Say. Lincoln. 



NOTES. 



Lymnaea megasoma. This species is abundant in Cobalt Lake, 

 the centre of the wonderful silver-cobalt mines that now hold the 

 attention of the world. No shell is found in an environment of such 

 enormous qualities of precious mineral. Untold millions in value of 

 silver ores, running in many cases over $5,000 to the ton, surround 

 the placid lake, the waters of which are so strongly impregnated with 

 arsenic as to cause serious intestinal trouble to those who use it. 

 L. megasoma however lives and thrives, attaining large size and pre- 

 serving to a ripe old age the beautiful brown epidermis characteristic 

 of young shells. I have also found L. megasoma in Lake Temagami, 

 the terrestrial paradise of the Algonquins — the North AVest Arm of 

 Lake Nipissing, and at the mouth of French River. It doubtless 

 occurs in suitable waters across New Ontario from the Albany River 

 to Lake Abittibi. — F. R. Latchford, Ottawa, Ont. 



Migration of Scallops The fact that beds of scallops in New 



Bedford and Fairhaven waters and along the Cape shore are being 

 rapidly thinned out, and in some places completely exhausted, while 

 new beds are being constantly located about Nantucket, is alleged to 

 be causing the Massachusetts Fish and Game Commission to perfect 

 a system of procuring more definite data regarding the movements 

 of this toothsome shellfish. 



Although the Nantucket fishermen will not commence dredging 

 before November 1st, they are keeping up a continual watch for new 

 scallop beds, and almost daily one of tin' boatmen will report large 

 beds of the shellfish on flats and shoals which only a week or so be- 

 fore were barren. And the old beds which give promise of such a 



