the Colony of Western Australia. 539 



70. CnoNDRiA dastjphylla, Ag. King George's Sound, August (293). 



71. Chondria sedifolia, Harv. Ner. Bor. Amer. C. iosiericota, and C Curdicana, Harv., MS. 



Common on Zostera leaves, King George's Sound, and Kottnest (29). 



72. Chondria coi-t/nephora, n. sp. ; ironde tereti succosa siccitate rosea robusta quoquoversum ramo- 



sissima ; ramis indivisis patentibus e latere bis terve ramosis ; ramulis oppositis, fasciculatis, 

 V. sparsis, Sffipius incurvis cylindraceis basi constrictis obtusissimis. CapeRiche and Garden 

 Island (114). Much more robust than C dasypliijlla. It soon breaks to pieces in fresh water, 

 by which character and others it is readily known from the following. 



73. Chondria verticillala, n. sp. ; fronde tereti succosa siccitate badia bis-terve umbellatim divisa; 



ramulis fasciculato-verticillatis saccatis oblongis obtusissimis basi constrictis ; tetrasporis in 

 ramulis nidulantibus. Garden Island, rare (273). 



74. Chondria XJmbeUula, n. sp. ; fronde pusilla (^-1 unciali) simplici saccato-clavata apice ramulis 



5-10 conformibus umbellatim coronata; ramulis nunc apice umbellulatis; ceramidiis ovatis 

 sessilibus; tetrasporis sparsis (190). Rottnest, on Zostera leaves. Avery curious and pretty 

 little species. 



75. Chondria lanceolata, n. sp. ; fronde pusilla (1-2 unciali) compressa cartilaginea alterne ramosa 



sub-disticha ; ramis ramulisque alternis basi et apice attenuatis acutis ; ceramidiis ovatis 

 pedicellatis ; tetrasporis sub apicibus ramulorum congestis. Rottnest, on Zostera leaves 

 (191). 



76. Leveillia jungermannioides. L. Schimperi, and L. gracilis, Dne. Abundant on a variety of 



Algw at Fremantle, Garden Island, and Rottnest (123). 



77. PoLTZONiA Sonderi, Harv. Ner. Austr. Garden Island, on Fucoids (284). 



78. PoLTZONiA/acctrfffl, n. sp.; caule primario repente; ramis erectis simplicibus ramosisve tenuis- 



simis flaccidis oligosiphoniis ; foUis (v. ramulis) alternis pectiniformibus, pectinis lacinulis 

 5-6 filiformibus artioulatis monosi}j/iomis acutis; stichidiis arcuatis rostratis. On Fucoids, 

 King George's Sound, Garden Island, and Rottnest. Much more slender, and of softer tex- 

 ture than P. Sonderi, and readily known by its one-tubed lacinuliE (34). 



79. PoLTSiPHONiA Hystrix, Harv. Ner. Austr., t. 14. Cast ashore, Garden Island (121). 



80. PoLTsiPHONiA i/a?/a)-(Zi(E, Harv. Ner. Austr., t. 13. With the preceding (117). 



81. PoLYsiPHONiA bi-eviartictdaia, Ag. Abundant on the reefs, near low water, Rottnest (188). 



82. PoLYsipHONiA Havinensis, Mont. ( ?) With the preceding, profusely common. More robust 



than the American plant, but otherwise very similar (118). 



83. PoLTsiPHONiA infestans, n. sp.; pallida, siccitate fuscescens; frondibus (2-3 uncialibus) carti- 



lagineis chartse arete adhajrentibiis setaceis sursum attenuatis pellucide articulatis ramosis- 

 simis; ramis patentibus pluries alterne v. vage divisis ramulisque conspersis; ramulis capil- 

 laribus simplicibus patentibus; axillis latis; articulis 4-siphoniis subtorulosis, inferioribus 

 diametro brevioribus, superioribus sequalibus v. sublongiorlbus. Common on Polyphysa 

 peniculus, at Princess Royal Harbour, King George's Sound. It has the h^hitoi P. fibrillosa, 

 but is more nearly allied to P.Harveyi and P. Binneyi than to any other that I remember 

 (22). 



84. PoLYSiPHONiA mollis, Harv. Ner. Austr. On Zostera, at Fremantle (120). 

 VOL. XXII. 4 A 



