Enterom. chcetomorphoides occurs in lagoons and other 

 sheltered places. It is partly met with entangled among va- 

 rious algse groNsing upon the roots of the mangroves, partly also 

 forming loose-lying masses often together \Nith other algse e. g. 

 Rhizocloniiim Kochianum Kiitz., Lijngbya majuscula Harv., 

 Enteromorpha plumosa Ktitz., etc. 



St. Thomas: Sheltered places in the Harbour, Bovoni Lagoon. St. 

 Croix: Christiansteds Lagoon. 



Geogr. Distrib. Barbadoes, Danish West Indies. 



3. Enteromorpha lingulata J. Ag. 



J. Agardh, Till Algernes Systematik, 3die Afd., VI. Ulvaceee, p. 143. 



The specimens referred to this species seem to agree very 

 well wdth the description of J. Agardh (1. c). 



At the base of the specimens the filaments are rather thin 

 but richly ramified; higher up they grow broader. The cells 

 are roundish quadrangular and placed in longitudinal series. 



Some few more slender specimens of nearly uniform dia- 

 meter seem to come near to E. prolifera var. tubulosa as des- 

 cribed by CoLLixs 1. c, p. 203. 



This species is found in sheltered and in more exposed pla- 

 ces growing on rocks at or a little above the surface of the sea. 



St. Croix: The Harbour of Christianssted, Lt. Princess, Xorthside; 

 St. Thomas: The Harbour, Store Xordside Bugt; St. Jan: Cruz Bay. 

 Geogr. Distrib. Extensive. 



4. Enteromorpha plumosa Kutz. 

 KuTZixG, Phycologia generalis, 1843, p. 300, pi. XX, fig. 1. 

 Enteromorpha Hopkirkii Harv., Phycologia Britannica 1S46 — 51, 

 pi. 258, Xereis Bor.-Am., p. 58. 



VicKERS, Phycol. Barbad., 1908, pi. V. 



Found in more sheltered places in bays or lagoons as well 

 as on rocks in rather exposed places. 



St. Croix: Lt. Princess, Cane Bay, Saltriver, Lime Tree Bay; St. 

 Jan: Cruz Bay, Coral Bay. 



Geogr. Distrib. The West Indies, The Mediterranean, Atlantic 

 coasts of Europe and America, etc. 



5. Enteromorpha clathrata (Roth) Greville. 

 Greville, Algae Britannicse, 1830, p. 181. Collixs, The Green Algse 

 of Xorth America, 1909, p. 199. 



Found in a rather sheltered place growing in shallow water. 

 St. Croix: The Harbour of Christianssted. 



Geogr. Distrib. Europe, Xorth American coasts and the West 

 Indies, Tasmania etc. 



