1896 .THE MICROSCOPE. 103 



Regarding these animals as a section of the large group 

 of Infusoria, whose bodies he supposed to have a like sim- 

 plicity of sarcodic composition he distinguished as Rizo- 

 pods, an account of the root-like diameter of their pseu- 

 dopodial extensions. 



They are found on the shores of New England where 

 I have collected them at Swampscott, Massachusetts in 

 the ripples of the sand at high water where they mark a 

 white ridge and their shells can be got by washing off 

 from the sand. They are also living there, as I have my- 

 self seen. On the algffi growing upon the rocks, perhaps 

 they can be got everywhere else by looking for them on 

 the sea weed. The sea weed should be cleaned, not by 

 acids, merely washing it rather violently in a plentiful 

 supply of seawater. The Bacillariariacse, Foramenifera 

 and such small fry will tiius be washed off the sea weed 

 and letting it stand for a time, can be searched with a dip 

 tube and a common pocket lens for the microscopic 

 atomies. 



Dr. Carpenter says they are limited to the shallower 

 seas near tropical shores, but certainly near tropical seas 

 at Swampscott. So I should look for them everywhere 

 away from the ice of the poles. They are found covering 

 the coral reefs, they say, but as yet I have not found them 

 in Florida. Perhaps it is because I have not searched the 

 shores of Florida on the side of the Gulf of Mexico, and 

 perhaps they will be found there by those more fortu- 

 nate than I have been. In partially inclosed seas, as the 

 Mediterranean and Red Seas also, they have been found. 

 Perhaps the Grulf of Mexico will bear searching. They 

 do not seem to live where the icy water of the North or 

 South affects the sea. Besides, the carbonate of lime 

 which is present in their shells seems to be present in 

 warmer seas. But at Swampscott the Gulf Stream does 

 not seem to bring them. Perhaps it is depleted by Cape 



