COLLECTION, EXAMINATION, ETC. 



295 



Kegarding the collection of foraminiferal material 

 from the locality in question Mr. Siddall states 

 that ' they may always be got by carefully scrap- 

 ing the surface of the velvety brownish mud at the 

 bottom of pools left by the tide, or by skimming the 

 top of the w^ater, if this mud be found to have risen 

 under the influence of sunlight. The oozy mud may 

 be got rid of by washing through a muslin net, and 

 the residuum put into small bottles filled with sea- 

 water.' 



Fig. 39. — Stage Aquarium for Observing 

 Living Foraminifera. 



One of the best contrivances for exhibiting the 

 Foraminifera alive is a glass cell made in the follow- 

 ing manner : iV thin plate glass slide measuring 

 about 3 in. x 2 in. is taken to form one side of the 

 cell. Next a piece of glass rod, such as that used for 

 stirring purposes, is bent up into a U-shaped form, 

 the sides of which are ground flat wdth emery and 

 water. This bent rod is cemented to the glass plate 

 by one of the flat surfaces with marine glue or india- 

 rubber cement. Another piece of thin plate glass, of 



