Neue Süßwasseralgen von den Samoa-Inseln. 145 
Cellulae rotundatae in familias consociatae membrana matricali 
elliptica vel irregulari circumdatae; familiae in ramulis seriatae. 
Diam. cell. 3—4 u. 
Insel Savaii. 
5. Porphyrosiphon Kaernbachii De Toni. 
var. samoensis noVv. var. 
Lat. fil. 11—12 x; vaginae 0.5 »; lat. fusco vel carnoso colore, 
vel passim hyalinae; articuli diametro subaequilongi vel 2-plo 
breviores. 
Insel Upolu. 
6. Seytonema coactile Mont. 
var. minor: nov. var. 
Lat. fil. 14 a; lat. trich. 10 u. 
Insel Upolu. 
7. Seytonema samoense nov. spec. 
Stratum intricatum, lanosum, griseo vel flavo-aeruginosum; lat. 
fil. 14—16 „; vaginae firmae crassae, vix lamellosae hyalinae vel 
flavae. Pseudorami sparsissimi singuli vel saepius geminati patentes; 
lat. trichom. 7—10 a. Cellulae in apice ramulorum diametro bre- 
viores in ramis 11/,—3-plo breviores. Heterocystae sparsae, singulae, 
Cylindraceae flavae; lat. 7—11 u, passim breviores plerumque dia- 
metro 2—3-plo longiores; dissepimenta cellularum indistincta; con- 
tentus cellularum flavo-coeruleus nonnullis granulis praeditus. 
Diese Art ist mit Sc. coactile Mont. verwandt. 
Insel Upohu. 
8. Hassallia Rechingeri nov. spec. 
Stratum pulvinato-tomentosum fuscescentes olivaceum; stra- 
tum basale irregulariter pseudoramosum, rami singuli; rami erecti 
dense tomentosi, 1—2 mm alti; fila 10—16  crassa; vaginae tenues, 
fragiles laete fuscescentes vel fere hyalinae; trichomata 7—11 u 
CTassa; articuli diametro paulo longiores vel ad triplo breviores; 
heterocystae rotundatae paulo applanatae vel quadraticae; con- 
tentus cellularum aerugineus vel violaceus. 
Insel Upolu. 
forma sazicola nov. forma. 
Stratum viride, fila tenuiora, rami sparsissimi. 
Lat. fil. 9—10 a; lat. trichom. 8 1. 
Insel Upolu. 
9. Tolypothrix distorta Kütz. 
var. samoensis nov. var. 
Stratum tomentoso-caespitosum, aerogineo-viride vel olivaceum; 
Vaginae Jaminosae, hyalinae vel inter flavas et olivaceas; fila 14—28 u 
Hedwigia Band Lil. 10 
