538 Dr. W. H. Harvey's Account of the Marine Botany of 



56. Thamnoclonium iemromi'an!/!)!, n. sp. ; caule corneo crasso (pedali et ultra) echinulato in- 



ferne tereti superne alato ramoso; ramis quoquoversum directis alatis phyllodia prolifere 

 ferentibus ; phyllodiis furcatis v. dichotomis costatis basi cuneatis apice obtusis, segmentis 

 lateralibus erectis plus minus iucisis. Fremaiitle, cast ashore in July (320). I first received 

 tliis truly noble species in a collection of Western Australian Algte, made by 3Ir. Mylore, 

 and presented to Herb. T. C. D. by my late lamented friend De. Cuakles Lemann, of Lon- 

 don, to whose memory this plant is now consecrated. 



57. DlCTYMENiA fraxinifolia. Fucus fraxinifolius. Turn. Rottnest, rare (241). I abandon the 



genera Epineuron and Spyrymeiiia as not being distinguishable from Dictymenia. 



58. DicTYMENi A ^min'ato, Grev. Garden Island, rare (110). 



59. DiCTYMENiA tridens, Grev. Garden Island, Rottnest, and King George's Sound (111). 



60. DiCTYMENiA spiralis, Sond. Common everywhere (20). 



61. DiCTYMENiA pectinella, n. sp. ; fronde interne valde costata superne sub-costata lineari distiche 



ramosa plana; ramis erecto-patentibus oppositis v. abortu alternis linearibus obtupis tenuis- 

 sirae costatis ciliato-fimbriatis ; ciliis oppositis argute peotinato-pinnatifidis involutis; anthe- 

 ridiis raagnis ovalibus ad apices ciliarum fasciculatis. Garden Island, very rare (290). A 

 very distinct and beautiful species. 



62. KiJTZiNGiA canaliculata, Sond. Abundant everywhere. Often 2 or 3 feet in length (61). 



63. KtJTZiKGiA angnsta, n. sp. ; fronde interne costa cartilaginea percursa decomposite pinnata; 



ramis anguste-linearibus planis, superioribus tenuissime costatis v. ecostatis; ramulis oppo- 

 sitis erecto-patentibus obtusis apice involutis. Rottnest, rare (242). Avery much smaller, 

 narrower, and thinner plant than A", canaliculata, of which it has the structure. 



64. KiJTZiNGiA serrata, n. sp. ; fronde basi cartilaginea denudata v. alato- marginata bi-tripinnati- 



fida et e costa primaria prolifera; laciniis membranaceis planis temiissime costatis, juniori- 

 bus, laoinulisque argute serratis. Rottnest, very rare (291). 



65. RyTiruLJEA Austratasica, Mont. King George's Sound, common. Rare at Garden Island (31). 



66. RYTiPHLiEA ctoa. {Rhodomela data, Sond. I) dendruidea (1-2 pedalis) ; caule tereti crassis- 



simo (2-3 lineas diametro) opaco ramoso; ramis decomposito-ramosissimis di-tri-chotomis v. 

 vage divisis, minoribus ramulisque patentibus transversim striatis ; striis appro.ximatis ; axillis 

 latissimis; ceramidiis ovatis pedicellatis; stichidiis ad latera ramulorum fasciculatis; sipho- 

 nibus primariis 5-6 magnis, strato crasso cellularum minutarum corticatis. Cast ashore at 

 Fremantle (304). A gigantic species, quite unlike any known to me. 



67- Trigenia Australis, Sond. Cast ashore in July, Fremantle (292). 



(;S. AcANTHOPHORA dendroidcs, n. sp. ; caule incrassato indiviso inferne nudo superne ramis alternis 

 spiraliter evolutis vestito; ramis decompositis circumscriptione hmceolatis; ramulis spinosis, 

 spinulis solitarlis sparsis. Rottnest on the reefs, near low-water mark (224). Much the 

 largest and most robust of the genus. 



69. Alsidicm? spinulosum, n. s]>.\ fronde tereti crassa dendroidea decomposite ramosissima ; ramis 

 ramulisque erectis quoquoversum sistentibus; ramulis spinajformibus sparsis; ceramidiis 

 ramulos terminantibus. Garden Island, Rottnest, and Cape Riche (180). Primary tubes in 

 the stem, 5, very large, and full of granular endochrome. 



