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, pl.V. 



To begin with I was very doubtful to what species I should 

 refer some small Phyllitis-Uke algæ which I found growing as an 

 epiphyte on H alidrys 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 

 plantag inifolia ji temiior (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 thailus, 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 Bor net in their 

 above-mentioned work under P. latifolia. These sporangia-bearing 

 piants were, moreover, composed of two lavers of cells which 

 according to Thuret et Bornet (Le. p. 15) generally occur in 

 young -- sometimes even in large — examples of Pund. latifolia; 

 there were numerous hairs at the margin of the thailus, 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. Agardfa refers tins species to ;i 

 new genus Homoeostroma founded by him. 



