70 Dansk Botanisk Arkiv, Bd. 3. Nr. 1. 



This species has been found in the month of February near 

 the shore in shallow water in a somewhat exposed place. 



St, Croix: Long Point. 



Geogr. Distrib. : Red Sea, Mauritius, Florida, West Indies. 



2. Liagora corymbosa J. Ag. 



Agardh, J., Analecta Algologica, Contin. Ill, 1896, p. 104. 



Of this plant I have had only a single dried specimen at 

 my disposal. This specimen agrees well with the few found in 

 J. Agardh's Herbarium at Lund. 



The plant has a rather characteristic appearance ; it is reddish 

 brown when dry and has a very scabrous surface which examined 

 under a lens is found to be composed of dark red and whitish 

 dots. The ramification is irregularly dichotomous with numerous 

 prolifications, the branches spreading out at nearly right angles. 



Having had only dried material I shall not enter upon a 

 more detailed description of the anatomical structure but only 

 point out that it seems to agree closely with that of L. elongata. 

 The cells in the assimilating filaments are nearly cylindrical or a 

 little barrel shaped, about 2 — 3 times as long as broad and about 

 11 H thick. The antheridia also seem to agree exactly with those 

 of L. elongata. Most probably therefore this species is only a variety 

 of that plant. Zeh, who has had the material in the Botanical 

 Museum, Copenhagen, for determination, has named the specimens 

 of this alga as L. elongata. 



This plant has only been collected as washed ashore material 

 and was sent to me by Dr. Hamburger. 



St. Croix: Sandy Point. 



Geogr. Distrib.: Florida, Bermudas. 



3. Liagora valida Harv. 



Harvey, W. H., Nereis Bor.-Am., Part II, 1853, p. 138, tab. 31, A. 

 Agardh, J., Epicrisis, p. 517; Analecta algologica, Contin. Ill, p. 107. 

 KüTZiNG, F., Tab. Phycolog., vol. VIII, pi. 92 I. 



This species was originally described on specimens from 

 Florida, and judging from Harvey's clear description my spec- 

 imens seem to agree well with them. The plant is characterised 

 by having a terete frond (about 1 mm thick) which is fairly 

 regularly dichotomous. The calcareous coating is quite continuous 

 giving the plant an even surface and when dry a whitish colour ; 



