451 PROF. DICKIE OX A.T. G.T. 



ECTOCARPACE^E. 



ECTOCARPUS C.ESPITALIS, J. Aff. 



Mr. Moseley's specimens agree with the characters of joints 

 and trichosporangia. 



Sphacelaria furcigera, Ktz. 



SQUAMARIACE2E. 



Peyssonnelia rubra, Dne. 



Small specimens on Halimeda opuntia. 



HELMIXTHOCLADTEiE 



Galaxaura lapidescens.. Lamx 



G. SPONGIOSA, Ktz. 



Stphoxace^:. 



Halimeda opuntia, Lamx. 



Yaloniace^ 



MlCRODICTYON AoARDHIANUM, Dne. 



Ulvace^e. 



Ulva LATISSIMA, L. 



Enteromorpha compressa, Grev. 



CONEERTACEiE. 



Cladophora inserta, n. sp. 



Flaccida, ramis altematim fasciculatis, ramulis subseeunclatim ramello 



sis ; articulis primariis diametro 8-10plo longioribus, ramulorum dta 



metro 2-3plo longioribus. 



(7) Algce collected in Helo Bay, Hawai, Sandwich Islands. 



CRYPTONEMIACEiE. 



Ahnfeltia conciona, J. Ag. 



" Extremely abundant on the basaltic rocks at Hilo Bay, form- 

 ing a conspicuous zone on the rocks left partly dry at low tide. 

 About tide-marks the rocks are concealed by a dense coating o 

 this Alga, the appearance reminding one of the growth of Fucii^ 

 on our British shores." Mr. Moseley further adds, " Such a gr<—* 

 of Alg* is very unusual, so far as I have seen, in the Tropics 



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