144 



lying nianienl. If Ihis inlerprelation is right, the fertilized carpogonium is first di- 

 vided by a vertical wall and thereafter one of the daughter-cells is divided by a 

 wall perpendicular to the first. The cell-complex shown to the left in fig. Q I take 

 to be a more developed, perhaps a fully ripe cystocarp. The three larger, upwards 

 directed cells are probably the carpospores; they are somewhat diverging, lying in 

 one plane, the same as that of the branching of the plant. A stage so much devel- 

 oped was only once observed. 



In spite of the likeness of our plant to the genus Chantransia in habit and 

 in the monosporangia , it seems correct not to refer il to this genus but to regard 

 it as the representative of a new genus, characterized in particular by the androphore 

 cell being very dilferent from the ordinary cells, and further by the development 

 and structure of the cystocarps. Among the sexual species of Chantransia, Ch. hal- 

 landica seems to be the one where the cystocarp offers most similarity with that 

 of Kylinia, but unfortunately its development is not known. The fact that the 

 androphore-cell is often situated on the carpogonium is analogous to the above de- 

 scribed case, that an antheridia-bearing cell is often superposed on the carpogonium 

 in Chantransia efflorescens. 



The genus is called after the Swedish phycologist, Dr. H. Kylin, who has con- 

 tributed so much to our knowledge of the northern marine AlgJE. 



Locality. Kli: TP, Tonneberg Banke, Ifi meters, on Sporochniis pediinculdtiis, September. 



Tribe Ncmaliese. 

 Nemaiion Targioni Tozzetti. 

 1. Neinalioii multifidum (Web. et Mohr) J. Ag. 



.1. Agardh, Limijea Bd. 15 p. 453, Spec. II, p. 419, III p. 508; Harvey, Fhyc. Brit. pi. 30; Bornet et Thuret, 

 Rech. fee. Florid., Ann. sc. nat. Veser. t. 7, 1867 p. 141, pi. 11 fig. 1—5; Janczewski (1877) p. 113, Plate 3 

 fig. 3; Wille, Ueber die Befrucht. bei Nemal. multif., Ber. deut. bot. Ges. 1894 p. 57; Grace D. Chester, 

 Notes concerning the development of Nemaiion multifidum, Botan. Gazette Vol. 21, 1896 p. 340 PI. XXV^ 

 and XXVI; J. J.Wolfe, Cytolog. Stud, on Nemaiion, Annals of Botany, Vol. 18, Oct. 1904: Oltmanns 

 (1904) p. 539, 540, 542. 



Rivulaiia multi/ida Weber et Mohr, Naturhist. Reise 1804 p. 193 Taf. Ill fig. 1. 



Chordaria multifida Lyngb. Hydr. p 51 : Flora Dan. Tab. 1669. 



As to the structure of the frond reference may be made to the descriptive 

 works and the paper of Graci-: D. Chester. The ramification is said to be dichot- 

 omous and it may possibly be so, but it may also be lateral, as shown in fig. 68 A, 

 representing a young plant. The structure of the cells has been studied by Wolfe, 

 from whose statements it appears that the presumed pyrenoid is not a true pyre- 

 noid but a vacuolar cavity without organized contents. While the chromatophore 

 is in general stellate, I found it in a basal disc globular without branches given 

 ofl' towards the periphery of the cell. 



As stated by Miss Chester the germinating spores develop at first into short 

 branched, creeping filaments consisting of short rounded cells. Later on filaments 



