117 



Of this species I have found in my collection two specimens 

 preserved in alcohol which agree very well with Collins' descrip- 

 tion of this species and with the specimen (nr. 474) of »Phyco- 

 theca Bor. Am.« quoted by Collins. 



Also the few dried specimens I earlier had referred to Br. 

 hypnoides Lamx. (cfr. Botanisk Tidsskrift, vol. 31, p. 147) belong 

 to Br. Duchassaingii. 



This species has been found in sheltered places in lagoons or 

 bays and most often growing upon roots of mangroves. 



It was gathered St. Croix: Christianssteds Lagoon, Saltriver Lagoon. 

 St. Thomas: In the harbour. 



Geogr. Distrib. Florida, West Indies. 



2. Bryopsis phimosa (Huds.) Ag. 



C. Agardh, Species Algarum, vol. I, p. posterior, 1822, p. 448. Harvey, 

 Nereis Bor.-Am., Pt. Ill, 1858, p. 31. J. Agardh, Till Algernes Systematik, 

 5te Afdn., VIII. Siphonese, p. 24. Borgesen, Some Chlorophyceee from 

 the D. W. I., Bot. Tidsskr., vol. 31, 1911, p. 147. 



As I have pointed out in my paper quoted above I have 

 arrived to the conclusion that Bryopsis pennata Lamx., Br. Har- 

 vey ana J. Ag. and Br. Leprieiirii Kutz. not only are connected 

 together by intermediate forms but also cannot be separated 

 from Bryopsis phimosa. Therefore I have preferred to follow 

 Harvey's conception of these species as pointed out by him in 

 »Nereis Bor.-Am. ««, p. 31 and consider them as different forms of 

 Bryopsis phimosa only. 



var. typica. 



Any quite typical specimens of Br. phimosa I have not found ; 

 the specimens were not so regularly divided and also somewhat 

 more flabby than in the typical form. Some of the specimens 

 referred to this variety were much branched bringing them near 

 to forma arhuscula J. Ag. 1. c. 



This variety is very common in sheltered places, in lagoons 

 etc. where it often covers the roots of the mangroves quite densely. 



St. Croix: Christianssteds Lagoon, Saltriver; St. Thomas: Crum 

 Bay; St. Jan: Cruz Bay. 



var. pennata. 



Bryopsis pennata Lamouroux. 



Lamouroux, Memoire sur troix nouveaux genres de la famille des 

 Algues marines (Journ. de Bot., vol. II, p. 134, pi. Ill, fig. 1). J. Agardh, 

 1. c. p. 23. ViCKERS, Phycologia Barbadensis, PI. LII. 



