240 - 



3, T^rwhheia duplet — , cellnlis in series in onili formes 

 binas atternaotes conjanctis. — Scenedesmas duplex JfCf2> 

 I. c. p. 81, 11.16. f. 100? (1834). — Trochiscia moniri- 

 formis /?. dnplex Br^b, in litt. — Scenedesmus obfosus 

 Meyen I. c. (quoad f. 30). — S. pectinatas Meyen (quoad 

 f. 33). 



(V. V.) ^ 



4, Trochiscia thermalis Mgh^^ cellolis parris soIitariiSj 

 binatis qnaternatisTe granulis obscurioribos farfis. — Jltfc- 

 negh^X c. p. 16. (1837.) 



(V. 9.) 



5, Trochiscia'^ dimidiata Ktz,^ cellolis ag^cgatis stria 

 obscariori dimidiaCis. — Ktz, 1. c. p. 65. n, 2. f, 75. (1834), 

 Brih, 1. c. n. 5. PI. YIII. 



Obs, Trochiscia moniliformis Montague (Ann. d. Sc. Nat, 

 Decemb, 1837) ad Diatomeas spcctare yidetur. 

 Trochiscia amara Af2. (Hetcrocarpella amara Twrp, 

 I. V. f. 15)', ens ambiguae admodam naturae. . 



Genera exclusa. 

 Microtheca KAr. ad Diatomeas: 

 Eehinella ^ch, ad Nostochineas.^ 



r 



Gloeonema Ag. ad Hydrareas* 

 FlenrococcQs Mghm ad Fro toco ceo ideas, 



Kr - 



