236 PROF. G. DICKIE ON THE XLQAS, 



CORALLINACEJE. 



Jania tenella, Ktz. 



GrELIDIACE^ 



Gelidium rigidum, Vahl. 

 Hypnea hamulosa, Turner. 



H. divaricata, Grev. 



CERAMIACEJ5 



Centroceras micracanthum, Ktz. 



SlPHONACEiE 



Caulerpa Boryana, J. Ag. 

 Halimeda Opuntia, Lamx. 

 H. tridens, Lamx. 



C ODIUM TOMENTOSUM, Hllds. 



i 



Chlorodesmis comosa, Harv. 



DASYCLADEiE. 



Neomeris dumetosa, Lamx. 



Ulyacejg. 



Enteromorpha compressa, Grev., var. trichodes, Ktz 



CoKFERYACEiE. 



Cladophora mauritiana, Ktz. 



CHiETOMORPHA INFLATA, KtZ.l 



Specimens imperfect, and recorded with doubt. 



The following Algse, attached to stones, were dredged ten miles 

 north of Tongatabu, in 18 fathoms, the bottom being shell-sand 

 with large Foraminifera : 



Dictyotacejs. 



DlCTYOTA RADICANS, Harv. 



Geog. distr. W. Australia. 



The specimens are small, 2 to 3 inches in length. 



