the Colony of Western Australia. 
535 
14. Sporochnds Fremantle (157). Being uncertain whether this or the preceding be Agardh’s 
plant, I defer the description of either. 
15. Spoeochnus radiciformis, Ag. Fremantle and Cape Eiche (156). 
16. Sporochnus scoparius, n. sp. ; fronde tereti rigida crassa dendroidea (2-3 pedali); caule strato 
velutino vestito; ramis creberrimis undique egredientibus decomposito-pinnatis angulatis 
glabris, minoribus erectis strictis sparse spinosis subalternis ; receptaculis ovalibus v. ob- 
longis pedicellum ipsis multiplo longius coronantibus. At Cape Eiche, and Garden and 
Eottnest Islands (248). I collected this at first as Fucus inermis, E. Br., or F. caudatus. 
Lab. ; but my plant is a true Sporochnus, and not always unarmed. 
Order III— LAMINAEIACE.F. 
17. Ecklonia radiata, Turn. E. radiata and E. exasperata, J. Ag. Lining most of the rocky 
shores at extreme low- water mark. Examination on the sea shore disposes me to unite these 
two supposed species. They vary extremely in roughness and smoothness, and in the com- 
parative length of the raohis, all the forms imperceptibly running together (75). 
1 8. Chorda lomentaria, Lyngb. Clothing tidal rocks, in winter, at King George’s Sound. My spe- 
cimens are not fully grown, being in the state called Asp. castaneus, Carm. (323). 
Order IV DICTYOTACE^. 
19. Haliseeis Mulleri, Sond. ; stipite elongate ramoso; fronde dichotoma v. suppressione ramorum 
alterne ramosa, sinubus obtusiusculis, segmentis erectis latis linearibus integerrimis sa3pe 
alterne divisis; lamina crassiuscula enervi; antheridiis sparsis. King George’s Sound, Cape 
Eiche, and Fremantle (102). Much larger and thicker in substance than //. 
with rounded sinuses. 
20. Haliseeis pardalis, n. sp. ; stipite brevi; fronde dichotoma, sinubus rotundatis, segmentis 
patentibus linearibus integerrimis repetite furcatis subundulatis obtusis; lamina tenui-mem- 
branacea enervi ; soris dispositis in lineas recurvas e costa ad marginem proficiscentibus. Fre- 
mantle, rare (155). A beautiful and distinct species, elegantly marked in dotted lines like 
a leopard’s skin. 
21. Padina Frazeri, Grev. Fremantle and Eottnest, common (158). 
22. Zonaria nigrescens, Sond. Eocky shores, common (49). Very near Z. variegata, if distinct. 
23. Zonaria interrupta, Ag. var. spiralis; segmentis spiraliter tortis. Cape Eiche and Eottnest (295). 
Metacheoma, nov. gen. Caulis basi radicans, cartilaginous, tereti-compressus, alterne ramosus, 
inferne costati, lineares, pinnatifidi, lacinulis bicuspidatis. /Spon* (?) per superficiem 
laciniarum sparsse, prominentes, intra perisporum hyalinum singulie nidulantes. Alga Aus- 
tralasica radice ramoso-fibrillosa, caule ramosissimo, ramis spiraliter tortis, laciniis tortione 
spurie trifariis. 
24. Metacheom.a thuyoides, n. sp. ; Middleton Bay, King George’s Sound; and Cape Eiche at low- 
water mark (21). Frond 12-18 inches long, much branched. The generic name alludes to 
a remarkable change of colour, from olive to verdigris green, when thrown into fresh water. 
