H5 
Protophyte from Ceylon . 
cumcluso ; cellulis cuiusque coenobii secundarii bini et valde dimorphosis, 
his duobus cordatis, illis duobus inter haec cylindratis et paulo intus curva- 
tis. Cellulis positis in pedunculis brevibus atque tenuibus, lasciniis parvis 
ad punctum ubi fixatae sunt provectis. Coenobio 85-100 ix longo, 70- 
90 n lato. Cellulis 12-20 fx altis, cellulis cylindratis 5-6 ix latis. 
Loc. In aquis dulcibus magnis. Insula Ceylonica. 
Summary. 
1. A new colonial member of the Isokontae, collected in the inland 
fresh waters of Ceylon by Prof. F. E. Fritsch, is described under the name of 
Dimorphococcus Fritschii , n. sp. 
2. The comparative morphology and systematic relationships of the 
new species are discussed. 
Literature cited. 
1. Bohlin, K.: Die Algen der ersten Regnellschen Expedition. I. Protococcoideen. Bih. Sv. Vet. 
Akad. Handl., xxiii, 1897. 
2 . Chodat, R.: Algues vertes de la Suisse, I. Berne, 1902. 
3 . Senn, G.: Ueber einige kolonienbildende einzellige Algen. Bot. Zeit., lvii, 1899. 
4 . Smith, G. M.: Phytoplankton of the Inland Lakes of Wisconsin, I. Wise. Geol. and Nat. Hist. 
Survey, Bull. 57, 1920. 
5 . West, G. S.: Algae, I. Camb. Bot. Handbooks, Cambridge, 1916. 
6. Wolle, F.: Freshwater Algae of the United States. Pa., 1887. 
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