598 WILLIAM ALBERT SETCHELL 



CodiuiiL fragile subvar. atlanticuiii (Cotton) O. C. Schmidt, Bibl. Bot., 

 heft. 91: 47, fig. 31, 1923. 



C. i)iucro7iatiu)i var. atlantiann Cotton, Proc. Roy. Irish Acad., 31: 114, 

 pi. 7 and 8, figs. 3 — 5, 1912; C. vmcronatum var. californicuDi SvedeUus, Sv. 

 Exp. till Magellanslander, 3, No. 8: 299, 300, pi. 17, figs. 14, 15, 1900. 



The extreme southern Codium of the west coast of South America is 

 credited to Desolation Island, at the western end of the Straits of jMagellan 

 (about lat. 52° S.). The figure 15 of SvEDELIUS suggests that this is rather 

 the C. iimcronatum var. atlaiiticuin Cotton (Clare Island Survey, Proc. Irish 

 Acad., 31 (15): 115, pi. 7, 8, figs. 3 — 5, 1912), the form common on the Falk- 

 land Islands. Otherwise, forms (or varieties?) of Codium fragile (Sur.) Hariot 

 seem inexplicably absent from collections from the west coast of South America. 



Explanation of Plates. 



Plate 30-. 



Codium cerebriforme Setchell. 



1. Surface view of Xo. 2. X i diam. 



2. « » » Xo. 5. X I diam. 



3. » » » Xo. 9. X I diam. 



Codium diinorphum Sved. f.? 



4. 3 .specimens (lobes?) collected at Valparaiso, Chile, U. S. Expl. Exp'n, 1836-43, U. S. 

 Xat. Herb. 



Plate 35. 



Codium fer}iandezianum Setchell. 



). Fragment Xo. i. X i diam. 



6. » Xo. 7 .\. XI diam. 



7. » Xo. 7 15. X I diam. 



Plate 36. 



Codium fer?uindesianum Setchell. 



8. Type specimen, coll. H. X. Moseley, Challenger Exp'n, Nov., 1875, Herb. Kew. X 0.4 diam. 



9. Fragment Xo. 4 A. X i diain. 



10. » Xo. 4 B. X I diam. 



Plate 37. 



Codium ferna)idezia?iu)n Setchell. 



11. Fragment X'o. 3. X 1 diam. (f psilopJtysalicum Setchell). 



12. » Xo. 6. X I diam, 



13. » Xo. 10. X I diam. {{. psilophysalicum Setchell). 



