LIBRARY 

 NEW YORK 



IBOTANICAL 



Journal °^«°^'^ 



OF THE 



NEW-YORK MICROSCOPICAL SOCIETY. 



Vol. IX. JANUARY, 1893. No. 1. 



NOTES ON CORDYLOPHORA LACUSTRIS AND MELI- 

 CERTA RINGENS. 



BY STEPHEN HELM. 

 (_Read November i^ih, 1892.) 



CoRDYLOPHORA LACUSTRIS. — Prof. Allmaii is, I believe, the 

 only scientist who has investigated the life-history of C. lacus- 

 tris, and although nearly forty years have elapsed since those 

 investigations were made public, they still stand alone. This is 

 attributable in all probability to two causes : first, the exhaus- 

 tive character of that memoir; and, second, the rarity of the form 

 itself — the former rendering observers shy of entering upon 

 ground already so ably trodden ; the latter placing a very effec- 

 tive barrier in the path of those who might have felt inclined to 

 investigate had circumstances favored them. 



Notwithstanding this, and the expressive and derisive represen- 

 ^tation applied to certain persons who " rush in where angels fear 

 gyo tread," I am desirous of placing on record some observations 

 ^made during the past summer, and I venture to hope I may be 

 ;^|forgiven for re-introducing this form to the Society after so short 

 py^an interval. 



■<5 To make the present remarks clearer I am compelled to refer 



^;o my paper published in the April number of the Journal, in 



which I speak of my anxiety to complete my observations on cer- 



