436 
Specimens bearing unilocular sporangia occurred in May and 
June. 
Found hitherto only on Ost.: Glibre (!), Fuglefjord (!). 
Order PUNCTARIACEAE. 
PUNCTARIA Grev. 
122. P. latifolia Grev. 1 Thuret & Bornet, Etudes phycologiques 
p. 13, pi. V. 
To begin with I was very doubtful to what species I should 
refer some small Phyllitis-like algae which I found growing as an 
epiphyte on Halidrys siliquosa near Glibre in Skaalefjord. 
I first took them to be broad Desmotrichum undulatum , as 
they agreed fairly well on the whole with Lyngbye’s figure of Ulva 
plantaginifolia (J tenuior (Hydrophyt., p. 31, tab. 6 B), which figure 
Reinke in »Algenflora d. westl. Ostsee«, p. 55, refers to Desm. un¬ 
dulatum. But on closer examination some of the specimens were 
found bearing a few immersed plurilocular sporangia at the apex 
of the thallus, which had quite a different form from those described 
and figured by Reinke under Desmotrichum undulatum , while 
they agreed well with those figured by Thuret et Bornet in their 
above-mentioned work under P. latifolia. These sporangia-bearing 
plants were, moreover, composed of two layers of cells which 
according to Thuret et Bornet (1. c. p. 15) generally occur in 
young — sometimes even in large — examples of Punct. latifolia ; 
there were numerous hairs at the margin of the thallus, as well 
as on the surface where they occurred in small tufts; and lastly 
the cells were rather large and fairly regular in form, so that all 
the characters pertaining to Punctaria latifolia were present. But 
the specimens being very small I was not quite sure of their really 
belonging to this species. 
During my above-mentioned visit to Heligoland I showed my 
preparations to Dr. Kuckuck, and he afterwards wrote to me that 
the specimens bearing the plurilocular sporangia should undoubtedly 
be referred to P. latifolia — the sporangia of which exactly agreed 
with those of the former — while they could by no means be 
referred to P. plantaginea, on which Dr. Kuckuck had found the 
1 In Analecta algologica, Continuatio III, J. Agardh refers this species to a 
new genus Homoeostroma founded by him. 
