Contribution i. 125 



monly 3 — 5 cm. long. The frond is until 5 mm. broad in 

 the middle part, but in general much narrower, not seldom 

 almost filiform, and from there partly attenuated downwards 

 as well as upwards, partly rather obtuse at the summit. It 

 is frequently simple, but sometimes it bears some few, short, 

 simple and filiform branches in the lower part of the frond. 

 In this part the cells are, seen from the surface, 4 — 5 — 6 

 angulated with rather sharp corners and ordered in more 

 or less regular series. In the upper part the cells are 

 smaller, often with more rounded corners and not seldom 

 without any order. In a cross section they are squarish or 

 vertically rectangular, mostly with rounded corners. 



The species is litoral, occurring on rocks or in clefts 

 of rocks at high-water mark. It has only been found on 

 open coast. In the beginning of August it was furnished 

 with zoospores. 



Distribution: Found at Berlevaag and Havningberg, 

 at both places scarce. 



Enteromorpha tubulosa Kiitz. 



Tab. Pbyc. 6, p. 11; E. intestinalis y tubulosa Kutz. Spec. Aig. p. 

 478. 



Descr. Enteromorpha tubulosa Ahln. 1. c. p. 49; excl. var. 

 Fig. „ „ Kiitz. Tab. Phyo. 6, t. 32. 



w „ AMn. 1. c. fig. 9. 



Litoral, growing in rock-pools at high-water mark. 

 Specimens with zoospores have been taken in July. 



Distribution; Only found al Bugonses in Sydvaranger, 

 pretty plentiful but local. 



Enteromorpha prolifera (Mull.) J. Gr. Ag. 

 Alg. Syst. 3, p. 129; Uiva prolifera Mull. Fl. Dan. t. 763, fig. 1. 

 Descr. Enteromorpha prolifera J. G. Ag. 1. c. 



„ tubulosa b. pilifera Ahln. Enterom. p. 50. 



Fig. „ pilifera Kiitz. Tab. Phyc. 6, t. 30. 



„ prolifera J. G. Ag. 1. c. t. 4, fig. 103-104. 



