10 CARL SKOTTSBERG, MARINE ALGJE 1. PHJEOTHYCE^. 



inclined to remove E. pectinatus from Ectocarpus, and to make a new genus for it. 

 I also noted a great likeness between this plant and my Elachista(?) ramosa. After 

 I had been obliged to give up my algological work, Professor Kuckuck continued 

 to study the tvvo species, and I supplied him with material, notes and drawings. 

 His notes were again handed över to me after bis death, when I found tbat he bad 

 united the tvvo species into one genus, for which he proposed the name Myriochcele 

 Kuck. et Skottsb. I guess that the numerous seriate gametangia were considered 

 to resemble small bristles. But as there are no real bristles at all, I do not accept 

 the name, for which reason another was proposed, suggesting the extreme fertility 

 of the filaments. 



Kuckuck placed the new genus very near the Elachistacece. There is a certain 

 resemblance to Leptonema, but I think the likeness to Ectocarpus is greater in the 

 ramification, the shape of gametangia, the position of the hairs, etc. E. pectinatus 

 could not very well be brought near Elachista, and E. {?) ramosa was, from the very 

 first, a stranger in the Elachistaceae. I shall quote Kuckuck's words: »Ich meine, 

 allés drängt dazu, Ect. pectinatus und El. ramosa zu einem neuen Genus zusammen- 

 zuf assen, das eine Vorstufe zu Elachista darstellt und durch seine ectocarpoiden Merk- 

 male charakterisiert ist. Die scharfe Umgrenzung ist freilich nicht leicht, aber auch 

 zwischen Symphoricoccus, Elachista und Leptonema sind die Grenzen nicht scharf. » 



A renewed study of the two plants convinced me that they must belong to the 

 same genus. They are, in fact, sometimes very like each other. The main difference 

 is that EL ramosa is much more branched in its lower parts and has larger game- 

 tangia, which never are so regularly seriate as in the other. No sporangia have been 

 observed in E. pectinatus, no lateral hairs in El. ramosa. The dimensions of the filaments 

 are much the same in both, but the cells are shorter in the former. 



Kuckuck proposed to remove two other Ectocarpi to the new genus. One of 

 these, E. tomentosoides Farlow was recognized by the writer in 1907 as a near relative 

 of his E. pectinatus. No hairs or sporangia have been described in the former. The 

 second species, E. ellipticus Saunders, has only basal gametangia. To judge from 

 Börgesen's supplementary description and figure of E. elacliistceformis Heydr. (Mar. 

 alg. Dan. W. Ind. Vol. II p. 435) also this species belongs to Gononema. 



G. pectinatum (Skottsb.) Kuck. et Skottsb. — Fig. 3. 



Syn. Ectocarpus pectinatus Skottsb. Ant. Meeresalg. I p. 11. 



Cells short, often square in outline, with few chromatophores. Zones of division 

 here and there in the filaments, which are about 10 ^ thick. Hairs 8 — 10 jj. thick, 

 sometimes lateral on upper parts of the erect filaments. Sporangia unknown. Basal 

 gametangia rare or missing, 60 X 12 jj., upper pectinate, 25 — 36 x 8— 15 |a. The vertical 

 filaments bear a remarkable likeness to Myrionema speciosum Börgesen, Mar. Alg. 

 Fseroes p. 423, fig. 78. — Falkland Islands: Stanley Harbour, in and about 

 the cryptostomata of Adenocystis (St. 1, 1. 11. 07, gt.). 



Distribution: Falkl. 



