56 THE AMERICAN MONTHLY [Feb 



Nitzschia accuminata, W. S. 



" balanotis, A. G. 



" sigma, F. T. K. 



" ' tryblionella, H. 



Pleurosigma angulata, W. S. 



" balticum, C. Gr. E. 



Pyxilla ? baltica, A. Gr. 

 Pyxidicula compressa, J, W. B. 

 Rhabclonema arcuatum, F. J. K. 

 Roicosphenia curvata, F. T. K. 

 Scoliopleura tumida, L. R. 

 Schizonema foetida, J. E. S. 

 Stauroneis aspera, C. Gr. E. 

 birostris,C. G. E. 

 Stephanopyxis appendiculata, C. G. E. 



" turris, J. R. 



Surirella febigeri, F. W. L. 



" striatula, B. Y. 

 Synedra affinis, F. T. K. 

 Terpsinoe americana, J. W. B. 

 Triceratiura alternans, J. W. B. 

 favus,C. G. E. 

 " maculatum, F. T. K. 

 " pinictatum, T. B. 

 These are all the Bacillariacese that I have detected up to 

 this time. There are several forms of Dictyocha a genus 

 of Radiolaria present also. And what I consider a new 

 genus of Bacilliariacese which I have called Ancile radiata. 

 It is free and found rarely in the salt water in Jamiaca 

 Bay, Rockaway. But of this I shall speak hereafter. 

 Mr. W. A. Terry says he has found broken fragments of 

 a Brunia but this I myself have not seen, although com- 

 mon in a deposit which I will also describe hereafter 

 taken at fifteen feet from the surface at Hoboken, N. J. 

 I, another day, visited Coney Island, N. Y., and searched 

 for " Infusorial earth " and this time was fortunate 



