548 
Dr. W. H. Harvey’s Account of the Marine Botany of 
Order V— SPH^EOCOCCOIDEiE. 
171. Delesseri.\ denticulata, n. sp. ; fronde costata dichotoma rigidiuscula; segmentis lato-lineari- 
bus crispato-undulatis margine denticulatis; costa opaca cartilaginea apicem versus evanes- 
cente; membrana; cellulis parvis rotundato-hexagonis ; venis nullis; soris in sporophyllis 
muricatis e costa prorumpentibus. Parasitic on Algce, Rottnest (235). Of a rigid sub- 
stance, scarcely adhering to paper. 3-4 inches high, the branches ^ inch broad. 
172 . Delesseria crisgyatula, n. sp. ; pusilla (1-2 uncialis); fronde costata dichotoma; segmentis 
linearibus integerrimis undulato-crispatis, costa articulata 3-siplionia ; venis nullis ; soris 
in sporophyllis propriis e costa enatis v. raro in segmentis terminalibus. Fremantle, on 
Caulinia, rare (129). Analogous to D. alata, but differing in the articulated midrib and 
absence of lateral veins. 
173. Delesseria spathulata, Sond.? On Zostera, Caulinia, and various Algw. Rottnest and 
King George’s Sound. I am not quite sure that my plant and Sender’s are the same. Mine 
is analogous to D. ruscifolia, as the following is to D. Hypoglossum (203). 
174 . 'D'Ehmsr.nw kypoglossoides, n. sp. ; pusilla, decumbens; fronde costata foliolis e costa tenui 
articulata trisiphonia prorumpentibus ramosa; foliolis lineari-lanceolatis planis utrinque 
acutis, venis nullis. In crevices of rocks at Garden Island and Rottnest (172). So like 
D. Hypoglossum as not to be known without microscopic examination. Then indeed the 
articulated midrib at once characterizes it. 
175 . Delesseria dendroides, n. sp. ; caule elongate nudo carnoso-cartilagineocrassissimo (2-3 lineas 
diametro) apice in frondem ramosissimam desinente ; fronde costata foliolis e costa valida 
prorumpentibus ramosa; foliolis geminis exacte oppositis lineari-lanceolatis utrinque acutis, 
adultis costa cartilaginea opaca, junioribus costa articulata percursis; venis nullis; mem- 
branae cellulis strato unico dispositis magnis oblongis. Fremantle, rare, G- Clifton, Esq. 
(269). A superb species of the Hypoglossum section, resembling a beautiful tree, a foot or 
18 inches high, with a trunk-like stem 6-8 inches long, supporting a large head of branches. 
The ramification is similar to that of D. oppositifolia, but the substance of the leaf is of a 
very different structure. It closely adheres to paper. 
176 . Delesseria revoluta, n. sp. ; fronde costata foliolis a costa valida infra apicem revolutum pro- 
rumpentibus ramosa; foliolis ovalibus latitudine sesqui vel subduplo-longioribus tenui- 
membranaceis undulatis denticulatis apice obtuse acuminatis revolutis; soris? . On 
other Algw, King George’s Sound, and Rottnest, rare. 2-3 inches high. Very unlike any 
previously described species (311). 
177. Delesseria cor(/o^fa, n. sp. ; fronde costata foliolis a costa crassa prorumpentibus ramosa; 
foliolis cartilagineo-carnosis crassis opacis lanceolatis basi ovatis obtusis ; membrana; cellulis 
pluriserialibus, interioribus magnis, superficialibus minutissimis; cystocarpiis sorisque in 
sporophyllis propriis e costa enatis. Garden Island and Rottnest, rare (279). My speci- 
mens are few and far from complete, but sufficient to establish a very distinct 'Species, with 
remarkably thick and densely cellular leaves. It most resembles D. nereifolia, but has a 
very different structure. It was small scraps of this plant which I described in Ner. Austr. 
under Sarcomenia delesserioides. 
