238 



pollct qnippe qnao 0,00008"" ot ultra in diamctro majori 

 sacpc ieiict. 



1. Sphaerastrum pictum Mci/en, cclliilis cuneato - acntis, 

 in globulnm sphaericura radiantibus. — Mcyeti 1. c. f. 22. 

 24. (1828), Ehr, Infiisor. p. 146. n. 165. — Micrasterias 

 Stauraslrum Ktz, I. c. p. 78, n. 18. — M, rosnla Ktz, 

 1. c. p. 72. 11. 4? 



(V. V.) 



2. Sphaerastrum ellipticum Meyen y cellnlis in 



globnium ovato- ellipticum radiautihns. — Mcycn Jalircs- 

 bcricht 1834. Wiegln. Arch. (1835). 



3. Sphaerastrum cuneatum Ktz., cclliilis cuneatis, bilobis, 

 lobis rotuudatis, in globulura maguum, varie lobatum, 

 cavum eoncrelis. — Ktz, Mss. in Menegh. Consp, Alg. 

 Eugan. p. 19. ( 1837 ). — Gomphosphaeria apenina Ktz, 

 Alg. Decad. XYI. N. 151. 



(V. T.) 



4. Sphaerasti'um cchinatutn Mgh,, cellnlis partito- bilobis, 

 lobis basi vcntricosis, apicc mucronatis in globulura sphae- 

 ricum echinatiim ladlantibiis. — Menegh, 1. c. p. 19. (1837). 



(V. T.) 



5. Spfiaerastrum radiatum Mgh,, cellnlis couicis, mucro- 

 natis, plerumque oetonis, mucronibns acntis longo pro- 

 ductis, iH globulum radiatum dispositis, — Menegh, 1, c. 

 p. 19. (1837). 



(V. V.) 

 Obs, Conferva cchinulala E. B. t. 1378, Echinella arti- 

 culata ab Agardh ( Syst. p. 16 ) et Micrasterias arti- 

 culata a Kützing (1. c. p. 78. n. 19) nuncupata, Des- 

 midiearum censni prorsus alicna A'idctur. 



XII. Trochiscia Ktz» Ccllulae globoso-compressae, 

 solitariac vel in seriemnnicara vel diiplicom simiil aggrcgatae. 



