26 Mr. G. Murray on Ceylon Algce in the 



Desmia amhigua, J. Ag. 

 Harvey ! No. 21, and YdiX. pulvinata^ Harv. No. 91. 

 Geogr. distr. Indian Ocean, from Ceylon to Australia. 



Squamaeie^. 

 Peyssonnelia ruhra, Grev. 



Harvey ! No. 41. (No specimen from Harvey in Herb. 

 Mus. Brit.) . Ferguson ! 



Geogr. distr. Adriatic. [Agardli criticises Harvey's naming 

 of P. rubra from the Friendly Islands, and states that the 

 Australian specimens are P. Gunniana. He further states 

 that he has not seen Harvey's Ceylon specimen. While I 

 therefore quote Harvey's No. 41 with hesitation, having seen 

 no specimen, I give Ferguson's specimen as P. 7mbra on Prof. 

 Dickie's authority. They are certainly quite distinct from 

 Harvey's Friendly-Island specimens and the Australian 

 specimens referred by Agardh to P. Gunniana. On the other 

 hand, they are more like P. Duhyi^ Crn., as named by Dickie 

 himself, than the Mediterranean P. rubra that I have seen.] 



POEPHYEACE^. 



Porphyra laciniata^ Ag. 

 Ferguson ! 

 Geogr. distr. Throughout all warm and temperate oceans. 



PorpJiyra vulgaris^ Ag. 

 Harvey ! No. 82. 

 Geogr. distr. Throughout all warm and temperate oceans. 



Sph^eococcoide^. 



Corallopsis cacalia^ J. Ag. 



Harvey ! No. 30. 

 Geogr. distr. Hed Sea. 



Gracilaria lichenoides , J. Ag. 

 Harvey ! No. 95. Ferguson ! 



Geogr. distr. Indian Ocean, Persian Gulf, Bombay [Hob- 

 son !) . 



Gracilaria confervoides^ J. Ag. 

 Ferguson ! 



Geogr. distr. Indian, Southern, Pacific, and Atlantic 

 Oceans. 



Gracilaria crassa, Harv. 

 Harvey ! No. 29. 



