ON THE 



NATUEAL HISTORY 



PUOTOCOCCUS PLUVIALTS. 



By FERDINAND COHN. 



[Abstracted from the 'Noya Acta Acad. Caes. Leop. Carolin. Natures, 

 Curios. Bonn,' torn, xxii, pp. 605 — 764, 1850.] 



By GEORGE BUSK, F.R.S. 



