THE FRESHWATER ALG OF CEYLON. 133 
Order CONJUGAT.E. 
Family ZYGNEMACE E. 
Subfamily MESOCARP E X. 
Genus Morerorta, Agh. 
39. MovaEoriA ROBUSTA, Wittr. JMesocarpus robustus, De Bary, Conj. t. 2. fig. 16. 
Var. BIORNATA, Wittr. in Wittr. & Nordst. Alg. Exsice. no. 615. 
Crass. cell. veget. 26-29 u; long. spor. 43 w; lat. spor. 36-38 p 
Hab. Paddyfields, Heneratgodha. 
Subfamily ZY GNEM E X. 
Genus SPYROGYRA, Link. 
40. SPIROGYRA NEGLECTA, Kuetz. Sp. Algar. 1849, p. 441; Rabenh. Flor. Europ. Algar. 
iii. p. 248; Petit, Spirog. de Paris, p. 26, t. 9. figs. 1-5. Zygnema neglecta, Hass. 
Crass. cell. veget. 53-634; long. zygosp. 75-94); lat. zygosp. 49-57 m. 
Hab. In running water, Royal Botanic Gardens, Peradeniya. 
41. SPIROGYRA DECIMINA, Kuetz. Phyc. Germ. p. 223; Petit, Spirog. de Paris, p. 25, 
t. 8. figs. 1-3. 
Crass. cell. veget. 32-36; long. zygosp. 70-734; lat. zygosp. 43-46 u. 
Hab. Among Podostemons, Mahawelli Ganga, near Peradeniya. 
Family DESMIDIACES. 
Genus GonatozyGon, De Bary. 
42. GonatozyGon RALFSII, De Bary, Conj. 1858, p. 76, t. 4. figs. 23-25. 
Long. 144-249 u; lat. 9°5-11°5 p. 
Hab. Paddyfields, Heneratgodha and Pandure. Pond, Royal Botanie Gardens, Pera- 
deniya. 
43. GoNATOZYGON PILOSUM, Wolle, in Bull. Torr. Bot. Club, ix. 1882, p. 27, t. 13. fig. 16; 
Desm. U.S. p. 22, t. 1. fig. 2. 
Long. 230 x; lat. 11 p. 
Hab. Paddyfield between Kosgoda and Urahaighasmahendai. 
