382 
Miscellanea. 
lacero-fissa, reticulata, e cellulis polygouis formata. Kerami- 
dia ovata, apiculata, poro pertusa, pericarpio crasso carnoso, e 
frondis pagina orientia, sessilia v. pedicellata granulis pyrifor- 
inibus basifixis fceta. Stichidia .?—Algse Capenses et 
Australasias, habitu Nitopbylli, structurd Dictyomenite affines. 
This genus, founded on a plant from the Cape of Good 
Hope, is inscribed to the Rev. John Pollexfen of Bradford, an 
accomplished British botanist and algologist, who has explored 
the marine flora or the Orkneys with much success. 
Pollexfenia pedicellata, Harv.; fronde latissima dichotome laci- 
niata; segmentis divaricatis, longitudinaliter pellucido-striatis; 
sinubus rotundatis; apicibus obtusis ; keramidiis ovatis, pedi- 
cellatis. 
George Town, V. D. L., R. Gun?i, Esq., 1272 and 1274.— 
Frond 4-5 inches long, and about equally broad, delicately mem¬ 
branaceous, with an orbicular outline, more or less deeply divided 
in a dichotomous manner; the segments spreading and the 
spaces between them remarkably wide and rounded ; the apices 
obtuse and broad, and the margin flat and without teeth. The 
substance is very thin, highly reticulated as in Nitophyllum, and 
destitute ot rib or veins, but the frond is traversed through its 
entire extent with a wide band of pellucid longitudinal filaments 
which run through its centre, and give the appearance, under a 
pocket lens, of pellucid striae. These filaments originate at the 
base of the frond, and radiate towards all the segments, passing 
through the middle portion of each, and evidently supply the 
place of midrib, though they do not assume its appearance. They 
are most obvious towards the apices, which is not generally the 
case with ribs or veins. Colour probably a purplish rose red, 
rather inclining to brownish red in drying. Keramidia abun¬ 
dantly scattered over both surfaces of the frond, ovate, acumi¬ 
nate, home on stalks as long as themselves. Stichidia unknown. 
It adheres to paper. 
The Cape of Good Hope species which I have sent to several 
of my friends either as “ Rytiphlmal n. sp.,” or “ Nov Gen.” 
may be thus characterised .— 
Pollexfenia lacihiata, Harv.; fronde fiabelliformi basi cuncata, in 
