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dentalem descripserat Harvey, speciem hane in collectione Algarum 

 ab Oerstedio sub itinere ad American! centralem lecta, nomine 

 Botryophorae üerstedi jam designaveram", that he does not mention 

 at all the name Batophor a, as just this name is to be found on 

 his own specimens. However this may be, I think it is necessary 

 in accordance with laws of priority to call the genus Batophora in 

 agreement with M. Howe. There is certainly the tedious question 

 as to the word ßdroQ, that it probably (though we do not know for 

 certain) signifies a raspberry or blackberry bush, not a blackberry 

 (cfr. Pape, Griech. Wörterbuch). 



In Bulletin Torr. Bot. Club, Vol. 31, 1904, p. 95, Howe 

 described a new variety of this species which he called var. laxus; 

 it is said to be specially distinguished by its open, loose structure 

 and by having the sporangia obovoid, oblong — ellipsoid or pyri- 

 form in shape. Later on Howe has himself (I.e. 1905, p. 580) 

 deleted it again and with good reason. For one reason the original 

 material has just this loose habit, also we find all possible inter- 

 mediate forms. Even in the same locality (Krause's lagoon in St. 

 Croix) I have found not only the already mentioned forms of the 

 sporangia but also spherical and a little flattened forms as Harvey 

 figures them. The accompanying figure 3 shows a pyriform spo- 

 rangium from a specimen from New Providence collected by the 

 late Baron H. Eggers. 



Batophora Oerstedi in the Danish West Indies 

 /4h7v nas hitherto on ty been found in Krause's lagoon on 



ff yTjA the south side of St. Croix where it was first found 

 Lix~_/ Jj by Ørsted; later on specimens were sent me by 

 V~"^V\/ Mr. O.Hansen, St. Croix, no locality stated, but 

 % >^T/ most probably from Krause's lagoon, and finally 

 1 have myself found it there. It was growing in 

 \ the westerly part of the lagoon in abundance but in 



Fig. 3. Batophora a vei 7 restricted domain on roots of mangroves and 

 Oerstedi J. Ag. on 0 \ç[ pieces of branches etc. lying on the soft muddy 

 Sporangium. , . , „ -, , 



About 30 : 1. bottom ; the water was quite shallow and unclear. 



III. Acetabularieæ. 



Acetabularia Lamouroux. 



The genus Acetabularia was created by Lamouroux in the 

 year 1816. In Linné' s , "Species Plantarum", Edit. I, 1753 this 



