1895.] MICROSCOPICAL JOURNAL. 41 



handling the charged filters and in getting them into or 

 out of the vials ; {i) a sounding line and lead ; {k) a com- 

 pass, and hand lens or microscope unless these be car- 

 ried in the pocket ; (l) a note book and pencil ; and Cm') 

 some extra sinkers and string, a needle and thread for 

 repairing the net if torn, and for long trips an extra net 

 (the cloth part), in reserve. 



With such an outfit, and the Michigan lakes to " fish " 

 in, a few weeks of summer vacation can be spent with 

 equal profit and pleasure. 



Diatoms of the Connecticut Shore. — VII. 



By WILLIAM A. TERRY, 



BRISTOL, COXN. 



Early last season, I visited Leete's Island to complete 

 observations commenced the previous season. At low 

 tide at Shell Beach, there is a broad expanse of soft mud 

 laid bare below the sands; this mud just before the re- 

 turn of the tide was covered with a brown film that I 

 recognized at once as being composed of living diatoms. 

 On examination the microscope showed that these were 

 chiefly three diff"erent sizes of naviculoid diatoms aggre- 

 gated into separate colonies, the smallest form being so 

 minute that a power of 500 diameters was needed to 

 definitely show their outlines; the next size being about 

 double tlieir linear dimensions, and the third considerably 

 larger and showing the crossband of a Stauroneis. 



I took a small fragment of the film about 1-10 of an 

 inch in diameter and separated and mixed it with a few 

 drops of salt water ; then took one drop of this and placed 

 it on a slip and covered with an inch square cover glass. 

 Under the microscope, this showed tiie film broken into 

 minute pieces in which the diatoms were packed in 

 solid masses, each kind separately, and were motionless ; 

 but thousands of each variety were diffused through the 



