402 BOTANY OF SOCOTRA. 



4. L. scabrosa, G. Dickie, in Proc. Roy. Soc. Edin. xi. (1882). 



Csespitosa, viridi-nigrescens, trichomatibus flexuosis oerugineo-cceruleis, articulis diametro duplo- 

 brevioribus, vaginis scabrosis, achrois, diam. '001 una 



Socotra. 

 Distrib. Endemic. 



2. OSCILLARIA. 



Oscillaria, Bory in Diet. Class, i. (1822), 594, and xii. (1827), 457; Ktz. Tab. Phyc. i.; 

 Kabenb. Alg. Europ. ii. 95, f. 24. 



A vast genus of wide distribution. 



1. O. Frolichii, Ktz. Phyc. Gen. 189, and Tab. Phyc. i. 31, t. 43, f. 1 ; 

 Rabenh. Alg. Europ. ii. 109. 



Socotra. 



Distrib. Europe generally. 



A variety of this somewhat protean type occurs on Socotra. 



2. O. anguina, Bory in Diet. Class, xii. (1827), 467; Ktz. Tab. Phyc. 

 i. 28, t. 40, f. 7 ; Rabenh. Alg. Europ. ii. 108. 



Socotra. 



Distrib. Europe generally. 



SCHIZOMYCETES. 



1. HYPHEOTHRIX. 



Hypheothrix, Ktz. Pbyc. Gen. 229, and Tab. Phyc. i.; Rabenh. Alg. Europ. ii. 75, t. 21. 



A considerable genus reported from many parts of Europe and from Ceylon. 



H. vulpina, Ktz. Sp. Alg. 267, and Tab. Phyc. i. 41, t. 67, f. 2 ; Rabenh. 

 Alg. Europ. ii. 86. 



Socotra. 



Distrib. Switzerland, Saxony, Silesia. 



2. BEGGIATOA. 



Beggiatoa, Trev. Flor. Engan. 56 ; Rabenh. Alg. Europ. ii. 94, f. 23. 

 A small genus recorded from Europe generally. 



B. alba, Trev. Flor. Engan. 57; Rabenh. Alg. Europ. ii. 94. 



Oscillaria alba, Vauch. Conferv. 198, t. 15, f. 11 ; Ktz. Tab. Phyc. i. 16, t. 38, f. 3. 



Socotra. 



Distrib. Reported from many parts of Europe. 



