CampbelVs Islands.'] FLORA ANTARCTICA. 1S5 



tibus oblongis cuneatis rariusve clliptico-lanceolatis costa furcata, soris rotundatis rnaculatis, eoccidiis costa- 

 libus v. sparsis. (Tab. LXXI. Fig. II.) 



Hab. Lord Auckland's group and Campbell's Island. (Br. Lyall.) 



Frons junior, folium obovatum, obtusum v. emarginatum, demum bilobum ; costa furcata, demum repetito- 

 dichotoma, deorsum crassa, sursiun attenuata, sub apicem evanida. Frondes adultas caulk furcatus v. dichotomus, 

 2-3 unc. longus, setae porcinse crassitie, nudus v. interruptim alatus, supeme in frondes cimeatas v. dichotomas 

 abeuns j inferne denudatus v. frondibus novis primordiali conformibus sed angustioribus minusque cuneatis ornatus, 

 hie 1-j unc. lougse, costis supra medium furcatis fructiferis. Coccidia in laminam rarius in costam sita, sphaerica, 

 sparsa, granulis cuneatis repleta. Sori sph<erosporarum rotundati, supra laminam dispersi. Substantia membranacea. 

 Color purpureo-roseus v. sanguineus. — Chartae adhaeret. 



When fully grown, this species resembles a very broad and luxuriant state of D. alata, found in the north of 

 Ireland, but differs essentially from it in its mode of growth. Judging by young specimens, it appears to originate 

 in a broadly ovate or cuneate leaf, traversed by a forked, or, as the frond advances, repeatedly dichotomous midrib, 

 which, though gradually evanescent, is obvious for nearly the whole length of the lamina, and thus differs from the 

 imperfectly branching veins of the Nitophylla. In old and battered specimens, however, this character can only be 

 detected in the young parts ; in them, the costa of the first formed leaf becomes denuded, considerably thickened 

 and converted into a dichotomous stem, irregularly winged in portions, and only preserving, on the upper part, the 

 remains of its former character ; while, all along its denuded portions, spring numerous new fronds, narrower than 

 that which forms the principal one, and less cuneate, but in other respects simdar. 



Plate LXXI. Fig. II. — 1, 2, and 3, specimens in different states, of the natural size; 4 and 5, coccidia; 

 G and 7, sphaerospores : — magnified. 



18. NITOPHYLLUM, Grev. 



1. Nitophyllum crispatwm, Hook. fil. et Harv.j fronde basi nervosa cuneata latissime expansa v. 

 oblonga dicliotoma v. laciniata margine crispata, nervis rarnosis, laciniis cuneatis apicibus axillisque obtusis, 

 soris minutis rotundatis coccidiisque sparsis. (Tajb. LXXI. Kg. I.) 



Hab. Campbell's Island ; dredged up in three fathoms water. 



Two specimens, one with capsular, the other with granular fruit, we refer to this species. The capsuliferous 

 specimen bears a very great resemblance to the north of Ireland variety of N. laceratum ; the gramdiferous, again, 

 has more the oblong form of N. punctatum. Both agree in being traversed, especially in the lower part, with obscure 

 dichotomous nerves, in having the margin crisped, and exhibiting a tendency to dichotomous division. The scat- 

 tered granular fructification essentially distinguishes it from N. laciniatum, and the form and size of the spots, from 

 N. punctatum. 



Plate LXXI. Fig. I. — 1, 2, and 3, specimens of the natural size ; 4, coccidia ; 5, sphaerospores : — magnified. 



2. Nitophyllum punctatum'? Grev. Alg. Brit. p. 79. t. 12. Agardh, Species Alg. vol. i. p. 186. 

 Aglaophyllum, Montague in Plant Cell. Canar. p. 150. 



Hab. Campbell's Island ; with the former. 



Decayed fragments, which appear to belong to this species, are all that were procured. 



19. PLOCAMIUM, Byngb. 

 Obs. The genera Thamnophora and Flocamium appear to differ in no respect from each other, and so perfectly 



