THE FEESHWATEE ALG^. OF MADAGASCAR. 47 



27. Closteeium KtJTZiNGii, Br^b. Liste Desm. p. 150, t. ii. fi^. 40; Nordst. Fresliw. 

 Alg. of New Zeal. & Austr. p. 70, tab. iii. fig. 20. 



Lat. 11 (/j ; striis 7 in 10 (/j. 

 No. 1. 



28. Closteritjm setaceum, Ehrenb. ; Ealfs, Brit. Desra. p. 176, tab. xxx. fig. 4. 



No. 0. 



Genus Penium, Br^b. ; Dc Bary. 



29. Penium curttjm, Br^b. in Kiitz. Spec. Alg. p. 167. (Cosmarium curtum, Ralfs, 

 Brit. Desm. p. 109, tab. xxxii. fig. 9.) 



Porma inteemedia, Wille, Perskv. Alg. f. Nov. Semi. p. 56, t. xiv. fig. 74. 

 Long. 36 fjb ; lat. 15*5 [ju. 

 No. 0. 



30. Penium delicatulum, Josh. Burmese Desm. in Journ. Linn. Soc., Bot. vol. xxi. 

 1886, p. 653, t. 25, figs. 9-10. 



Var. MiNOE, nov. var. (PL V. fig. 36.) Var. duplo minor, mcmbrana densil et dclica- 

 tissime pmictatsi. 

 Long. 37'5 /t*; lat. 15*5 /u-. 

 No. 1. 



31. Penium minutissimum, Nordst. Bidrag till kiinncdom sydligare Norges Desm. 

 p. 46, fig. 21. 



Long. 11*5 (JU ; lat. 8 [i. 

 No. 0. 



32. Penium, sp. 



Long. 21 ^ ; lat. ll'S f.. (PL V. fig. 29.) 

 No. L 



33. Penium, sp. 



Long. 20 [^ ; lat. 10 [^. (PL V. fig. 28.) 

 No. 0. 



Genus Cylindeoctstis, Menegh. 



34. Cylindeoctstis tumida, F. Gay, Essai Monogr. Conj. p. 52, t. i. fig. 1. 

 Eorma membrana minutissime punctata. 



Long. 89 {Jt, ; lat. 27'5 //,. 

 No. 1. 



