TAB. XLIV. 
Polypodium (Ctenopteris) pellucidum, Kaulf . 
Glabrum subcoriaceum, frondibus ovatis oblongisve profunde 
pinnatifidis, laciniis valde approximatis patentibus oblongis 
crenato-dentatis vel serratis vel erecto-patentibus remotis 
marginatis pinnatifidis, soris copiosis rotundatis y. ovalibus 
saspe confluentibus, yenis dicliotomis striisque interstitialibus 
pellucidis, stipite rachique validis fuscis nitidis, caudice 
crasso repent e squamoso. 
a. fronde lata laciniis acutiusculis serratis. 
Polypodium pellucidum, Kaulf. En. Fil. p. 101. Gaudichaud , 
in Freyc . Voy. p. 356. Hook , et Am in Bot. of Beech. Voy . 
p. 103. (tab. nostk. larger figure'). 
/3. fronde augustiore coriacea, venis yix pellucidis, laciniis 
numerosis approximatis erecto-patentibus obtusis crenato- 
serratis. 
7. fronde elliptica, laciniis valde approximatis obtusissimis 
obscure crenatis. (tab. nostb. smaller figure .) 
8. fronde elongata bipinnatifida, laciniis primariis remotis. 
Polypodium myriocarpum, Hook. Ic . Fil. t. 84. (See also 
the. next plate, t. 45.) 
Hab. Oahu, Sandwich Islands, Chamisso , Douglas, Beechey , 
Dr. Died. 
Without a coloured figure of a magnified portion of this 
Fern it would be difficult to give an idea of the peculiar 
venation of the plant. The frond is opaque, but the veins 
are pellucid and of a rich tawny colour, when seen between 
the eye and the light ; and besides the free (clavate at the 
extremity) veinlets 3 of which the upper one bears the sorus, 
there is, what I here call, an intestitial pellucid stria always 
communicating with a crenature or sinus between the teeth 
of the margin, usually the most conspicuous of the pellucid 
lines. I am satisfied that the above mentioned varieties 
belong to one and the same species, and that they pass the 
one into the other. 
Tab. 44 exhibits vars. and (the larger specimen) 7. nat. 
size. — Fig. 1 , Portion of the underside of a fertile lobe seen 
from beneath : — magnified. 
