Herbarium of the British Museum. 31 



RhodomeJa (?) crassicauUs, Harv 



Harvey ! No. 8. 



[Agardh places this species among " species exclusfe," 

 without giving it another resting-place.] 



Poli/siphonia secunda, Ag. 

 Ferguson ! 

 Geogr. distr. Mauritius, Atlantic, and Mediterranean. 



Polysiphonia ohscura, J. Ag. 

 Ferguson ! 

 Geogr. distr. Throughout Atlantic, Mediterranean. 



Polysiphonia Thwaitesiij Harv. 

 Harvey ! No. 15. Ferguson ! 



Polysiphonia utricularis^ Zanard. 

 Ferguson ! 

 Geogr. distr. Red Sea, Indian Ocean (Kurrachee, Mur- 



ray \) 



Polysiphonia mollis^ Hook, et Harv. 



Ferguson ! 



Geogr. distr. Australia. 



Polysiphonia corymbosa^ J. Ag. 



Harvey! No. 12, Ferguson! 



Geogr. distr. Mauritius, Bombay (Hobsonl). 



Polysiphonia ferulacea, Suhr, 

 Ferguson ! 

 Geogr. distr. Atlantic, Australia, Pacific. 



Polysiphonia glomerulata, Ag. 



Harvey ! No. 13. Ferguson ! 



Geogr. distr. Indian Ocean, Pacific, Australia. 



Spec, inquir. 



Polysiphonia rigidula, Kiitz. 

 Ferguson ! 

 Geogr. distr. West Indies. 



Neurymenia fraxinifoliaj J. Ag. 

 Harvey! No. 49 (sub Dictymenia). 

 Geogr. distr. Indian Ocean, Madagascar, Western Aus- 



tralia 



