611. 
Trib,. I. Protococceae Trevis. 
Thallus e cellula matrice unica nuda compositus- » 
Subtrib. 1. Euprolococceae. . 
Cellulee emucos® liberz. 
1. Protococcus Agardh. Cellule matrices” protogeniss erypto- 
coccoder, sphaerice, nude, emucosz, libere. —. Hierunter stehen 
Species 1—20. Ba 
2. Protosphaeria Turpin. Cellule matrices protogeris phzeno- 
eocecodeze, spherice, nude, emucos, libere. — Spec. 21-35. 
3. Pleurococcus Mene gh. Ceilule matrices protogeniss eryp- 
tocoecodez, primitus sphaerice demum vesiculsformes,. themnogenesi 
‚composita heterogenea zquiplana multiplicatee, nudee, emucose, liberm. 
— Spec. 36—57. _ 
4. Botryocystis Kütz. Cellulee matrices protogenis cellulas 
chromatogenias pheenococcodeas numerosas subsphericas homomer- 
phas isodiametras foventes, spheric», nude, emucoss, libere. — 
Spee. 58, 59. 
9. Anacystis Menegh. Cellule matrices protogeniss ‚cellulas 
chromatogenias eryptococcodeas numerosissimas subsphericas homo- 
morphas isodiametras foventes, subsphaericae, nude, emucoszs, liberz. 
— Spec. 60—62. 
6. Embryosphaera n. gen. Cellulee matrices protogenis eryp- 
tococcodes eystiphorz, sphariese, nude, emucoss, libere. Cystides 
spheerice, e cellula protogenia eryptocoecodea composite. — Spee. 
63. E. Meneghinii (Chlorococcum infusionum Menegh.). 
Subtrib. 2. Haemalococceae. 
Cellule parce mucos® aggregatz. 
7. Micraloa Biasol. Cellulg, matrices protogenis eryptocoe- 
codes spheerice, nude, parce mucos®, in glomerulos indeterminatos 
laxe et inordinatim aggregate. — Spec. 64—70. 
8. Haematococcus Agardh. Cellule matrices protogenise pha- 
nococcodes subsphzeriee, nudse, parce mucosw, in menmbranulam 
tenuissimam indeterminatam laxe et inordinatim aggregatse. — Speec.. 
71—74. - 
9. Diplocystis n. gen. Cellule matrices protogenis vesicule- 
formes cellulas secandarias homogeneas phenococcodeas heteromor- 
phas anisodiametras numerosas foventes, nud®, parce mucose, in 
membranulam tenuissimam indeferminatam laxe et inordinatim ag- _ 
gregate. — Polyeystis Kütz. Sp. 7578, 
. 39*: 
