396 PERCY SLADEN TRUST EXPEDITION. 
Dicryora, Lamour. 
18. Dictyota dichotoma, Lamour. in Desy. Journ. de Bot. ii. (1809) p. 42. 
Amirante, below 25 fms., and 20-25 fms. Seychelles, 44 fms.; Praslin, on reefs 
exposed at dead low tide. 
Geogr. Distr. Mediterranean. Atlantic. Pacific. Indian Ocean. 
Ecrocarpus, Lyngb. 
49. Ectocarpus spongiosus, Dickie, in Journ. Linn. Soc., Bot. vol. xiv. (1875) p. 191; 
Gepp, in Journ. Linn. Soc., Bot. vol. xxxv. (1903) pp. 479-80, pl. 13. figs. 9-13. 
Praslin, on reefs exposed at dead low tide. 
Geogr. Distr. Indian Ocean: Mauritius, Laccadive Islands, Admiralty Islands, 
Cheduba Straits (Burmah). 
APP DT x. 
With the Algze were a few marine phanerogamic plants, the names and distribution 
of which are as follows. We have to thank Dr. A. B. Rendle for assisting us in the 
determination of them. 
POTAMOGETONACEA. 
ZOSTERA, Linn. 
50. Zostera nana, Roth, Enum. Pl. Germ. i. (1827) p. 8. 
Imperfect specimen, doubtfully referred here. 
Seychelles; Praslin. On reefs exposed at dead low tide. 
Gen. Distr. N. & 8. Atlantic (eastern shores). Mediterranean. Indian Ocean 
(western shores). 
CymopocgkA, Koenig. 
51. Cymodocea serrulata, Aschers. & Magn. in Sitzber. Ges. naturf. Freunde Berlin, 
1870, p. 84. 
Seychelles; Praslin. On reefs exposed at dead low tide. 
Gen. Distr. Red Sea. Indian and West Pacific Oceans. Mostly tropical. 
52. C. isoetifolia, Aschers. in op. cit. 1867, p. 3. 
Seychelles: Praslin. On reefs exposed at dead low tide. 
Gen. Distr. Red Sea. Indian and Pacific Oceans. Mostly tropical. 
53. OC. ciliata, Ehrb. ex Aschers. in loc. cit. 
Amirante, 25 fms. Coetivy, on reef. Cargados Carajos. 
Gen. Distr. Red Sea. Indian and West Pacific Oceans. Mostly tropical. 
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