ANIMAL NATURE OF DIATOME^B. 495 



[Kiitzing has recently published (' Botanische Zeitung/ 

 3d of April, 1846, No. 14, p. 249) some new Diatomese, 

 discovered by Brebisson, at Falaise. An Achnanthidium, 

 a Gomplwnema, two Namculce, a Ceratoneis, two Synedrce, 

 and a new genus belonging to the family Striatellese. 



73. PLEURODESMIUM. -"Tric/toma articulatum fascia- 

 forme, articuli plant scepe geminati, fascia transversali 

 media liyalina notati, ex sulcis longitudinalibus obsolete 

 punctatis (perforatis ?} costati ; costis rugulosis. 



And thus is completed the number of seventy-two genera 

 proposed (in the preceding enumeration Kiitzing omitted 

 number 49 by mistake); and the number of species is 

 brought up to more than eight hundred.] 



(For further information in regard to these genera, and 

 additional ones since proposed by Kiitzing, see his 

 ' Species Algarum,' 1849. ED.) 



