161 
the medulla. The carpogonial branch is five-celled, the auxiliary-cell branches are 
curved, and composed of a great number of short cells (fig. 77). Ripe cystocarps 
have been met with in March. — Antheridia have not been met with. 
The species is distributed in the Skagerak, in the northern and eastern Kattegat 
and in the northern part of the Sound. In the Skagerak it does not attain the 
same dimensions as in the Kattegat, its length scarcely exceeding 30 cm, probably 
owing to the more agitated water. It has here only been met with at compara- 
tively slight depths, viz. 4 to 9,4 m. In the Kattegat it is mainly distributed in 
the eastern part, where it has been met with almost only at depths of 16 m or 
Fig. 76. Fig. 77. 
Dilsea edulis. A, six sporangia showing various forms and modes of Dilsea edulis. A, carpogonial branch. B 
division. 220:1. B, transverse section of cortex with a sporangium. 390 :1. auxiliary-cell branch. 390:1. 
deeper, where the salinity is high and little variable and the variations of tempe- 
rature are also relatively small; it attains here its greatest size. — In most localities 
it is taken only in small quantities in the dredge; I have found it most abundantly 
at Hanstholm (Sk), where it was dominant in some places at 7,5 meters depth. 
LynGBye found it off Gilleleje on the North coast of Sealand, 12 miles from land 
at 26 meters depth, abundantly in places where other algæ are not met with, but 
only Mytili and other molluscs, barnacles etc. It was here often fixed to the mytili 
and attained a size of up to 63 cm; the fishermen called it here “rode Klude” 
(red rags). 
Localities. Sk: YT off Hanstholm lighthouse, 7,5 met., rather abundantly; Thorup Strand, 
washed ashore (C. M. Poulsen); Løkken, washed ashore, FK Kongshoj Grund off Lønstrup, 8,5 met.; 
NW of Hirshals, 30 met., some fragments (A. C. Johansen); west side of Hirshals mole, 4 met., washed 
ashore by Lonstrup and Hirshals, Tværsted (V. Schmidt) and Skagen. — Kn: Herthas Flak, 20—22 met., 
6 cm long; Hirsholmene, 5,5—7,5 m, 6 cm long; North of Læsø (Edy. Bay), 29 cm long; IX, 11 m; TR near 
Trindelen, 23,5 m. — Ke: Fladen, ZF, 22,5 m, and IQ, 22—30 m; south side of Groves Flak (Bergesen); 
D. K. D. Vidensk. Selsk. Skr., 7. Række, naturvidensk, og mathem. Afd. VII. 2. 21 
