1897] MICROSCOPICAL JOURNAL. 213 



of note as a reminder to the expert that many objects 

 which are so familiar to him that he never thinks of offer- 

 ing them to the Club, are capal)le, with proper explana- 

 tion, of being valuable to equally learned persons in 

 different fields. 



An object is named, not fully described by the label; 

 and the most unpromising- object may be valuable by 

 reason of some peculiarity of structure, history or rela- 

 tions that can only be known by a careful view of the 

 slide in connection with its note. Again, the most com- 

 mon slide may have a valuable note ; some of the best 

 notes ever in our books have been writen to the most 

 insignificant slides, and there are members who could 

 make valuable any slide that could be found. If both 

 slide and note be found weak, what better satisfaction can 

 a member get than to make it useful to his neighbors by 

 his own suggestions ? 



Circulation — Owing in great degree to the energy 

 and devotion of our Secretary, Dr. S. Gr. Shanks, and the 

 kind co-operation of the membership generally, the circu- 

 lation has been, amidst almost unsurmountable difficul- 

 ties, kept up to a fairly good average. During the sea- 

 son now closing, nearly every circuit will have received 

 thirteen or fourteen boxes, and with as much regularity 

 as possible under the circumstances. 



Ovum in Testis of a Lamprey. 



By R. H. ward, M. D., 



TROY, N. Y. 



[Abstract of remarks at the Microscopical Section of the Troy ScieiUific 

 Association.] 



This slide of Petromyzon is a good anatomical study, 

 showing the essential male organ, the tt^stis, in a riotously 

 active state, jiroducing clouds of spermatozoa; and also 

 showing the characteristic ovum of the vertebrate ani- 



