List of Abbreviations employed in 

 this Paper. 



A. S., At/. — Adolf. Schmidt, Atlas der Diatomaceenkunde, 1874 — 

 1891. 



Bail., J. IT., Mic. Obs. — J. W. Bailey, Microscopical Observations 

 made in South Carolina, Georgia, and Florida, 

 1850. 



Bail. L. IV., Para. — L. W. Bailey, Notes on New Species of 

 Microscopical Organisms, chiefly from the Para 

 River, South America, 1861. 



Bleisch, Hedw. — Dr. Bleisch, Ueber zwei Campylodiscus (C. costa- 

 tus, und C. spiralis) in Hedwigia, i860. 



Brcb., Cherbg. — A. de Brebisson. " Sur quelques diatomees 

 marines du littoral de Cherbourg," 1854, and 

 Ed. II., 1867. 



Brim, Diat. Esp. twuv. — Jacq. Brun, Diatomees, Espece snou- 

 velles marines, Eossiles ou Pelagiques, 1891. 



Casir., Chall. — Conte Castracane, Report on the Diatomaceae 

 collected by H.M.S. Challenger, 1886. 



C/., Arctic jD.—P. T. Cleve, On Diatoms from the Arctic Sea, 1S73 



