592 WILLIAM ALBERT SETCHELL 



Subgenus Schizocodiiiill Sctchell. 



Setchell, in A. II. S. Lucas, Proc. Linn. Soc. N. S. W., 60: 204, 1935. 



The Codiums of the subgenus Schizocodiiivi are much more numerous 

 than those of Tylecodium and are even more difficult to dehmit and to proper!)- 

 refer under their respective names. The specimens which have been included 

 under Codiiim tomentosimi are scattered through most oceans and seas. The 

 same is true of some others of the dichotomous Codiums. Much dependence, 

 in attempting to unravel the confusion, both apparent and possible, may often 

 be placed on habit and utricular variation, and some assistance in the way of 

 suggestion may be derived from geographical discontinuities. Four species, 

 Codium tonientosuni var. peruvianum M. A. Howe (Peru), C. foveolaUim IVL A. 

 Howe (Peru), C. contractuin Kjellm. (West Patagonia) and C. fragile (Sur.) 

 Hariot (Fuegia), have been credited to the west coast of South America, as 

 has been indicated earlier. The only plant of this subgenus credited to the 

 Juan Fernandez Islands is the ■>->€. toviciitosiiui-A of DiCKiE (Jour. Linn. Soc, 

 Bot.. 15: 453, 1876). 



Species group (or i\nepsiotes) Decor ticata. 



Subsectio Dccorticata O. C. Schmidt, p. p. maj., in Bibl. Bot., Heft 91: 

 52, 1923. 



Of the various attempts to divide the genus Cod'nivi into groups of 

 species, that of O. C. SCH.MIDT in his »Beitrage zur Kenntnis der Gattung 

 Codium Stackh.» seems to have been based on reasonably logical grounds. It 

 is desirable to follow out his practice, especially in the m.ore extensive and 

 intensive studies now being carried on, in which the necessity for some aggre- 

 gation of small numbers of species, of close but general morphological agree- 

 ment, yet more or less notable because of minor morphological deviation, 

 associated with distinct geographical discontinuities, seems demanded, as well 

 as their segregation from other similar minor aggregates. For such groups, it 

 seems preferable to consider them as groups of species and to indicate each 

 group by a designation from one of the species, such as in the present case. 

 The epithet thus chosen may be thought of as a contraction for ■>->Codia decorticaia->:, 

 although Schmidt has it as Subsectio decorticaia. In a number of genera, such 

 as Codium, it has seemed helpful to designate such small species-groups as an 

 tAnepsiotcs-ii ('Av£'V.6rr,c) or cousinship group, especially when dealing with the 

 segregates from what has hitherto (and usually) been considered a wide-spread 

 and variable species. In such case the anepsiotic name indicates the broader 

 specific view while the segregate name indicates the particular phyletic(?), or 

 perhaps only a geographic, derivative from the general stock. 



Codium fernandezianum sp. nov. 



Plates 35—38, figures 5 — 15, phues 41 — 48, figures 9—49- 



C. fernandezianum Setchell in Herb. Kew!; C. tomentosum Dickie, Proc. 

 Linn. Soc, Bot., 15: 453, 1876 (non Fucus tomcntosus Hudson). 



