IX. AEGyE. 
639 
would recommend Hassall’s ‘ British. Freshwater Algae,’ Ralfs’s ‘ British Desmidieae,’ and 
Kiitzing’s ‘ Tabulae Phycologicse.’ 
Of more general works 011 Algos there are Harvey’s ‘ Manual of British Algae ’ and ‘ Phy- 
cologia Britanniea,’ but especially his ‘ Nereis Australis ’ and ‘ Phycologia Australis,’ both 
admirable works full of beautiful plates of southern Alga. Iu my Antarctic, New Zealand, 
and Tasmanian Floras also, rnaDy New Zealand species are figured. The best general work, 
though still incomplete, is J. Agardh’s ‘ Systema Algarum,’ an excellent book in all respects. 
To my late friend Dr. Harvey I am indebted for the determination and description of the 
New Zealand Alga in my Flora of these islands. His widely and deeply deplored death 
during the present year has deprived me and this work of the benefits of his revisal of the 
following compilation. 
KEY TO THE SUBORDERS, TRIBES, AND GENERA. 
Suborder I. Melanospermer4 or Fucoide.®. 
( Olive-green or brown Algae.) 
Olive-brown, more rarely olive-green or black, marine Alr/ce, usually large, 
coarse, much-branched or horizontally expanded. Frond continuous or 
articulate, simple lobed or branched, often bearing distinct leaves, branches, 
bladders, and receptacles of fructification. Fructification on the surface of 
the frond, or in cavities in its substance; 1, obovoid or ellipsoid, simple or 
4-parted spores, enclosed in a hyaline membrane, naked, or surrounded by 
jointed filaments (peranemata) ; 2, oblong antheridia, terminating jointed 
filaments, and containing moving spores ( antlierozoids ) ; 3, buds or leaflets 
( propagula ), developed on the surface or edges of the frond, capable of be- 
coming new plants. 
Series A. Frond thick, not articulate, its outer stratum formed of minute 
densely-packed cells. 
Tribe I. Fuceae. Spores and antheridia in spherical cavities (conceptacles) , either sunk 
promiscuously in the surface of the frond, or confined to proper receptacles. 
§ 1. Conceptacl es in distinct receptacles, not promiscuously sunk in the frond or in its joints. 
* Frond with distinct stem, branches, leaves , and bladders ( except Turbinaria). 
a. Receptacles very different from the leaves. 
f Frond branching from both sides of the stem. 
Receptacles axillary. Bladders distinct from the leaves .... 1 . Sargassum. 
Bladders un distinguishable from the leaves, which are turbinate 
and peltate 2. Turbinaria. 
Receptacles marginal, racemose, cyliudric, warted 3. Carpophyllum. 
ft Branches from one edge only of a flattened frond. 
Receptacles marginal 4. Marginaria. 
j8- Receptacles obviously formed of leaves. 
Leaves distinct from the branches, marginal, distichous .... 5. Phyllospora. 
Leaves distinct from the branches, spirally disposed round the stem 6. Scaberia. 
Leaves passing into branches 7. Cystophora. 
** Frond with distinct stem and leaves, but no bladders ... 8. Landsburgia. 
*** Frond flabellately dicliotomously branched, without leaves or 
bladders 9. Fucodium. 
