202 PROF. G, DICKIE ON ALGA 



Calophyllis tenera, J. Ag. 



Swain's Bay. 



Geog. dist. South Shetland. 



Kallymenia dentata, Suhr., var a. 



Swain's Bay. 



Geog. dist. Cape of Good Hope. 



Gigartina radula, Esp. 



Swain's and Observatory Bays. 



The collection includes various forms of this species. 



Geog. dist. Cape of Good Hope ; New Zealand ; Auckland and Camp- 

 bell Islands ; California. 



Epymknia variolosa, H.f. fy Harv. 



Swain's Bay. 



Geog. dist. Kerguelen only. 



* 



Halymenia latissima, H.f. 8f Harv. 

 Rocks at low-water mark, Observatory Bay. 

 Geog. dist. Auckland and Campbell Islands. 



Ceramiace^;. 



Ceramium rubrum, Ag. 



Swain's Bay. 



Geog. dist. General in colder seas of both hemispheres. 



Ptilota Eatoni, n. sp. 



Swain's Bay. 



Raclri filiformi, pinnis oppositis, inaequalibus, una majore alterna 

 minore ; pinnellis inferioribus subulatis, subsimplici serie articulorura 

 constantibus, ultimis pectinatis ; sphaerosporis apice pinnullarum sub- 

 solitariis ; favellis terminalibus, involucri ram is pectinatis. 



This species resembles P. JLarveyi in the character of the invo- 

 lucre, but differs in general habit, and in colour, which is dull 

 purple, as well as in the structure of the larger and smaller piu- 

 nules. 



Geogr. dist. Kerguelen only. 



Ballia callitricha, Ag. 



Observatory Bay, on roots of Macrocystis. 



Geog. dist. Falklands ; New Zealand ; Aucklands ; Australia ; Tasmania. 



Callithamnion simile, H.f. 8f Harv. 





i 



* 



Geog. dist. Kerguelen only. 



Macrocyst 



