212 Linnean Society, [Feb. 1, 



mosing of contiguous venules which occurs in some species of Adi' 

 antum, and a constant and complete reticulation, such as exists in 

 the genus Hewardia ; and he concludes that that genus should be 

 retained. This conclusion he finds unexpectedly confirmed in Fee's 

 'Genera Filicura,' just received in this country, vv^here the same view 

 is taken of the species of Hewardia as that which he had previously 

 adopted, and an additional species {H. serrata) mentioned of which 

 he had no previous knowledge. 



The species enumerated by the author are arranged as follows : — 



* Sori continui ; venae primarias costiformes. 



1. Hewardia adiantoides, J. Smith = Adiantum Hewardia, Kunze. 



2. H. dolosa, Fee = Ad. dolosum, Kunze. 



** Sori interrupti ; venae uniformes. 



3. H. Le Prieurei, Fee = Ad. Le Prieurei, Hoolc. 



4. H. serrata, Fee. 



Mr. Moore regards H. Wilsoni, F6e (Adiantum, Hook.), as a true 

 Adiantum ; as also Sir W. Hooker's variety y. of Ad. lucidum. In 

 both these the dichotomous veins occasionally anastomose ; but there 

 is nothing like complete reticulation, and the union, when it does 

 occur, is evidently accidental. 



If the name Hewardia be retained, as the author proposes, for the 

 genus of ferns to which it was first applied, he suggests that of 

 Isophysis for the Melanthaceous genus, subsequently so called by 

 Sir William Hooker in his ' Icones Plantarum,' t. 858, the species 

 retaining the name of Tasmanica. 



The same rule induces the author, in the second case referred to, 

 to separate from the genus Deparia, Hook., a species having a truly 

 and constantly reticulated venation, that of Deparia being uniformly 

 free. The species in question is Deparia Moorii from New Caledonia, 

 named by Sir Wm. Hooker after Mr. C. Moore, the Director of the 

 Sydney Botanic Garden, by whom it was discovered ; and the fol- 

 lowing are its generic characters : — 



CioNiDiuM, T. Moore in Gard. Coinp. (nomen tantum). 



Char. Gen. Vence reticulatae. Sori semi-globosi, extra-marginales, in 

 venularum apicibus excurrentibus pedicellati ; capsulis pedicellatis. 

 Indusia stipitata, subcyathiformia. — Frondes bipinnatce ; soris ex 

 utrdque pinnularum pinnatijidarum margine prominulis. 



Cionidium Moorii, T. Moore, I. c. 



Deparia Moorii, Hook, in Journ. of Bot. iv. p. 54 t. 3. 



Hab. in Nova Caledonia, D. C. Moore (1851). 



