24 The Microscope. 



expended to better advantage. For him these fine lenses are 

 worthless, because he does not use them. 



The accumulating of useless microscopical appliances is 

 always to be deprecated, especially at the outset of one's career. 

 The advanced worker is justified in seizing upon every advan- 

 tage even the least obtainable and at any cost, provided the 

 apparatus will help him, and provided it shall not hereafter take 

 to itself one of Miss Pfieffer's discarded bandboxes. Near the 

 top of the ever lengthening list of microscopical " Don'ts," 

 should be placed ' Don't accumulate trash.' 



Acknowledgment. — To Dr D. B. Ward, Poughkeepsie, N. Y., 

 for three superb slides of Diatoms : Aulacodiscns Rogersii from 

 Barnegat, N. J., Coscinodiscus subtilis from the Hudson river, and 

 Anthodiscus floreatus from Oamaru, N. Z. The Diatoms are 

 mounted on the cover and surrounded by a little ring of 

 cement so that the microscopist can find them with no loss of 

 time. The Aulacodiscns is perfection, even to the three or four 

 marginal apparently tubular processes, their presence unbroken 

 being an evidence of great care and skill in the manipulation. 



NEV/S FRO/A 

 THE Vv'ORKERS 



In the Journal of the Quekett Microscojncal Club, Mr G. C. Karop 

 publishes a translation of a portion of a monograph by Dr W. 

 Kopf, on certain parasites which were found infesting Diatoms 

 obtained from bog pools in the sub-alpine region of Norway at a 

 height of 1150 metres, although the same parasite has been seen 

 on Diatoms in a small lake at the elevation of 600 metres, and 

 may yet be found on those from the plains. The particular 

 species affected was a Pinmdaria, the infested individuals occur- 

 ring in great abundance. Although the fungus resembles that 

 already described as infesting Desmids, it is supposed to be suf- 

 ficiently distinct to warrant the formation of a new genus, <Sep- 

 tocarpus, which is relegated to the order Rhizidieae. 



