2 0 = 
dentalem descripserat Harvey, speciem hanc in collectione Algarum 
ab Oerstedio sub itinere ad Americam centralem lecta, nomine 
Botryophorae Oerstedi jam designaveram”, that he does not mention 
at all the name Batophora, 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 Adrog, 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 (l.c. 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 
has hitherto only been found in Krause’s lagoon on 
\ the south side of St. Croix where it was first found 
by Ørsted; later on specimens were sent me by 
Mr. O. Hansen, St. Croix, no locality stated, but. 
most probably from Krause’s lagoon, and finally 
I have myself found it there. It was growing in 
the westerly part of the lagoon in abundance but in 
Fig. 3. Batophora à Very restricted domain on roots of mangroves and 
Oerstedi J. Ag. on old pieces of branches etc. lying on the soft muddy 
Sporangium. 3 
About 30:1. bottom; the water was quite shallow and unclear. 
Ill. Acetabulariee. 
Acetabularia Lamouroux. 
The genus Acetabularia was created by Lamouroux in the 
year 1816. In Linné’s, “Species Plantarum”, Edit. I, 1753 this 
