374 DESMIDE^. 



This species differs from the previous one in being much 

 smaller, more finely striated, and having longer setaceous 



d. Closteria smooth, not apjjendaged, straight. 



10. Closterium Lunula Ehr. 



Plate LXXXIV. Fig. 4. 



Char. Frond fusiform, ventricose, toith rounded extremities. 

 Granules numerous, scattered. Endochrome fasciated, 

 bands usually three. 

 CI. Lunula Ehr., Die Infus. t. v. figs. 1. and 3. C. Lunula 

 Menegh., Synops. Desmid. 



Hah. Beckley Furnace: Mr.Jenner. High Beech: A.H.H. 



This species I noticed when examining some Pediastra 

 kindly sent me by Mr. Jenner. It is figured by Ehrenberg 

 as a state of Closterium Lunula, and indeed Meneghini regards 

 it as that species, conferring the name of Ehrenberg upon 

 what better agrees with the name of Lunula, and with 

 Ehrenberg's description, although this last is evidently so 

 contrived as to embrace both species. The frond, in Mr. 

 Jenner's specimens, was not of the gigantic size figured by 

 Ehrenberg. 



11. Closterium acerosum ^Ar. 



Plate LXXXVII. Fig. 5. 



Char. Closterium fusiform, gradually attenuated towards 

 each extremity. Granules in a single series down the 

 centre of the frond. Endochrome handed. 



Corpicetti a haccillo Corti? Observaz. Micros, p. 111. t. 11. 

 fig. 17. i. g. and r. s., 1774. Vibrio Lunula Miiller, Ani- 

 malc. Infus. taf. 7. f. 12., 1786. Vibrio acerosus Schrank, 

 Fauna boica. 111. 2. p. 47., 1803. Baccillaria multistriata 

 Hempritch et Ehrenberg, Symbola3 Physics, Phytozoa, 



