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



Order V.— SPH^EOCOCCOIDEiE. 



171. Delesseria denticuJala, d. sp.; fronde costata dichotoma rigidiuscula ; segmentis lato-Iineari- 



bus crispato-iindulatis margine dentlculatis ; costa opaca cartilaginea apicem versus evanes- 

 cenfe; membranse cellulis parvis rotundato-hexagonis ; venis nullis; soris in sporophyllis 

 muricatis e costii 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 crispatula, n. sp. ; pusilla (1-2 uncialis); fronde costata dichotoma; segmentis 



linearibus integerrimis undulato-crispatis, costa articulata 3-siphonia ; yenis nullis ; soris 

 in sporophyllis propriis e costa enatis v. raro in segmentis terminalibus. Fremantle, on 

 Caiilinia, rare (129). Analogous to D. alata, but differing in the articulated midrib and 

 absence of lateral veins. 



173. Delesseria spatlmlata, Sond.? On Zostera, Caidinia, 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. Hijpoglossium (203). 



174. Delesseria /ti/poglossoides, n. sp. ; pusilla, decumbens; fronde costata foliolis e costa tenui 



articulata trisiphoniii prorumpentibus ramosa; foliolis lineari-lanceolatis planis utrinque 

 acutis, venis nullis. In crevices of rocks at Garden Island and Rottnest (172). So like 

 D. Hi/poglossum as not to be known without microscopic examination. Then indeed the 

 articulated midrib at once characterizes it. 



175. Delessei'.ia dendroides, n. sp. ; caule elongate nudo carnoso-cartilagineocrassissimo (2-3 lineas 



diametro) apice in frondem ramosissimam desinente; fronde costata foliolis e costii valida 

 prorumpentibus ramosa ; foliolis geminis exacte oppositis lineari-lanceolatis utrinque acutis, 

 adultis casta cartilaginea opaca, junioribus costa articulata percursis; venis nullis; mem- 

 brana; cellulis strato unico dispositis magnis oblongis. Fremantle, rare, G- Clifton, Esq. 

 (2G9). 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. 



1 76. 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 dentlculatis apice obtuse acuminatis revolutis; soris? — — . On 

 other Algic, King George's Sound, and Rottnest, rare. 2-3 inches high. Very unlike any 

 previously described species (311). 



177. Delesseria corj/o/i'a, n. sp. ; fronde costata foliolis a costa crassii prorumpentibus ramosa; 



foliolis cartilagineo-carnosis crassis opacis lanoeolatis basi ovatis obtusis ; membranie 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. verdfolia, but has a 

 very different structure. It was small scraps of tliis plant which I described in Ner. Austr. 

 under Sarcomenia delesserioides. 



