30 DR. O. DICKIE ON ALGfrJE FROM 



No. 8. Wedelia biflora, DC. 

 Hab. Elefantgeberge, Geelvinksbay. 



No. 7- Cerbera Odollam, Gcert., var. obtusifolia. 

 Hab. Elefantgeberge, Geelvinksbay. 



No. 4. Cordyline terminalis, Kth. 9 var. infundibularis, Baker. 

 Folia subpedalia 12-15 lin. lata. Racemus simplex laxus, floribus 

 subsessilibus infundibuliformibus 2 lin. longis, segmentis basi brevis- 

 sime coalitis. 



Differs from var. sepiaria of the Fiji Islands in its smaller leaves, 

 simple snbspicate raceme, and shorter funnel-shaped perianth. 



(j. a. b.) 



Hab. Geelvinksbay. 



Nos. 1 & 2. Dendrobium trichostomum, Reich, fi I. MSS. (§ Pla- 



nifolia, Reich, f. in Walperss Ann. vi. 282). Caulibus fasciculatis 

 elongatis gracilibus saepius foliosis, foliis distichis ovato-lanceolatis 

 vel ellipticis acutis tenuibus, vaginis granulato-scabridis, floribus 

 axillaribus folio brevioribus fasciculatis v. breviter racemosis (ut vide- 

 tur pallide roseis) bracteatis, bracteis brevibus ovatis acutis, sepalis 

 subsequilongis oblongis obtusis, petalis conformibus, mento obtusis- 

 simo, labello calciformi integro obovato-oblongo obtuso longitudina- 

 liter nervoso margine incurvo fimbriato extus infra marginem pube- 

 rulo, columna brevissima glabra. 



Caulis 1-H-ped. Folia 1£-2 poll, longa, \-\ poll. lata. Bractea: \-\ 

 poll, longae. Sepala \ poll. lata. Mentum J-J poll, longum. 



Hab. Geelvinksbay. 



Nos. 3 & 10. Hedychium, aff. H. angustifolio, Roxb. 

 Hab. Geelvinksbay. 



(Besides the above numbered specimens, the two following 



Ferns were found entangled in the Dendrobium. 



Trichomanes Jllicula, Bory, var. 



Poly podium undistinguishable in its barren state from P> 

 (Pleuridium) selliyucoides 9 Baker. (J. G. JB.) 



Notes on Algae from the Island of Mangaia, South Pacific 



By a. DiCKii, M.D., F.L.S. 



[Read April 15, 1875.] 



For the collection to which this communication refers I am in- 

 debted to the kindness of the Rev. W. W. Gill, who for many 



