400 BOTANY OF SOCOTRA. 



3. ULVACEiE. 

 ULVA. 



Ulva, Linn. Gen. u. 1206 ; Ag. Sp. Alg. 401, pro parte ; Ktz. Tab. Phyc. vi. ; Rabenh. Alg. 

 Europ. iii. 316. 



A genus of several species and represented in all seas. 



U. latissima, Linn. Fl. Suec. 433 ; Harv. Phyc. Brit. t. 171 ; Ktz. Tab. 

 Phyc. ; Rabenh. Alg. Europ. 



Soeotra. 



Distrib. Cosmopolitan. 



4. CHiETOPHORACEJ]. 

 MICROTHAMNION. 



Microthamnion ,Nag. in Ktz. Sp. Alg. 352, and Tab. Phyc. iii. t. 1, f. 1, and t. 55, f. 1 ; Rabenh. 



Alg. Europ. ii. 375, f. 106. 



A small genus, including both marine and fresh water forms, found in 

 Europe, at the Cape, St Helena, and Kerguelen Island. 



M. breviarticulatum, G. Dickie in Proc. Roy. Soc. Edin. xi. (1882), 456. 



Ramulis alternis, articulis diametro aqualibus vel duplo-longioribus, diam. "0002 una 



Soeotra. 

 Distrib. Endemic. 



SCHIZOPHYTA. 



The late Dr G. Dickie kindly determined the species of Schizophyta we 

 brought from Soeotra which are enumerated here. 



*&• 



CYANOPHYCE^E. 

 1. NOSTOCACEJ]. 



NOSTOC. 



Nostoc, Vauch. Conf. 203, t. 16; Ktz. Sp. Alg. 295, and Tab. Phyc. ii.; Rabenh. Alg. Europ. ii. 

 162, f. 35. 



A large genus, several of the species having a wide distribution. 



1. N. aureum, Ktz. Tab. Phyc. ii. 1, t. 1, f. 4; Rabenh. Alg. Europ. ii. 105. 



Soeotra. 



Distrib. Reported from Holland and Scandinavia. 



