199 



gium. The sporangia are not pedicellated. In my specimens I 

 have not found paraphyses. 



I have collected the plant in February and March and as 

 mentioned above in deep water only, from 10 — 40 meters. It 

 occurred in open sea or in places where strong currents prevailed. 



St. Croix: near Buck Island, off Frederiksted. St. Jan: in the 

 Sound between this island and St. Thomas in several places, and near 

 Thatch Island, off Annaberg, Hermitage etc. St. Thomas: in the sea 

 west of Water Island. 



Geogr. Distrib. Seems to be common in all warmer seas. 



2. Zonaria lobata Ag. 



C. Agardh, Systema Algarum, 1824, p. 265. J. Agardh, Species Al- 

 garum, vol. I, 1848, p. 109. J. Agardh, Till Algernes Systematik, II, 1872, 

 p. 46. Harvey, Nereis Bor.-Am., Part I, 1851, p. 105, pi. VII C. C. 

 Sauvageau, Observations sur quelques Dictyotacees et sur un Aglaozonia 

 nouveau. (Bull, de la Station biol. d'Arcachon, 1904 — 1905, 8e annee). 

 A. Vickers, Phycologia Barbadensis, part II, pi. VI. 



Stypopodium lobatum Kiitz., Tabulas Phycologicae, vol. IX, p. 25, pi. 63, 

 fig. 1. 



Of this species I have myself collected only a very few 

 specimens, but I have received several from Mr. 0. Hansen 

 Ganneskov collected on the coast of St. Croix but without locality. 



The specimens I have collected were taken in shallow water 

 and in a somewhat exposed locality. 



St. Croix: Cane Bay. 



Geogr. Distrib. West Indies, Brasilia, Canary Isles, Cape, Galapagos 

 Island, Japan? 



Padina Adans. 



Up to the present time much confusion has prevailed as to 

 the synonomy of the species belonging to this genus. 



In her latest large paper concerning the Algge of the »Siboga« 

 ]V[me Weber-van Bosse has given very useful information as to 

 several incompletely described species, having examined the origi- 

 nal specimens in Herb. Thuret-Bornet, in Herb. Kutzing and 

 others and given a detailed description of each. 



The characteristic features of the species are based upon 1) 

 the mutual distribution of the organs of propagations and series 

 of hairs, 2) the presence or absence of indusium and 3) the 

 number of cell layers in the thallus. 



