138 



not mention it Ihe basal disc figured l)y him (1. c. fig. 10) belonged to an asexual 

 or a sexual plant. 



The species attains in the Danish waters a length of 5 mm., but it is rela- 

 tively seldom more than 3 mm. high. As mentioned above, the asexual plants are 

 as a rule smaller than the sexual ones; however I have found in the Little Belt 



a specimen with monosporangia measuring 5 mm. in 

 length. It grows principally on other Algae; I have 

 recorded it on lo different species, most frequently on 

 Delesseria sangvinea , Furcellaria, Desmarestia aculeata, 

 Cystoclonium purparascens, Polysiphonia elongata, further 

 on leaves and roots of Zostera, on tubes of Hydroids, 

 Ascidians, shells of Buccinum and finally on stones. It 

 has been met with in depths of 7,5 to 38 meters, most 

 frequently 11 to 23 meters. In the following list of 

 localities the depth is only indicated when it is outside 

 the last named limits. It is interesting that this sub- 

 arctic species has been met with in nearly all the 

 Danish waters, also in the Baltic, but not in the Lim- 

 fjord nor in other shallow waters where the summer 

 temperature is comparatively high. 



Localities. Ns: AG near tlic .lutlaiul Reef, 28 met. — Kn : 

 FG, Hertlias I'lak; FH near Frederiiisliavn 4 7,5 met.; VU and VT, 

 9,5 met., N. of Lkso. — Ke: FC; Zli' and VY, Fladen; IK, Lille Middel- 

 grund; lA, Store Middolgriind ; RL — Km: XF, Lieso channel, 8,5 met. 



Ks: OS, Hastens Grund. — Sa: FS, Vejro Sund; YV, south of 

 Hatterbarn ; DK, Bolsaxen. - LI): XP, Middclfart; common around 

 Fteno. - Sb: Z: near Sprogo (Ostenfeid) ; Langelandsbelt: UH, UT and 

 Chantransia ci/lZsicns. .1, filament L^. - SlK bM, south of Hveen; OG^ - Bw: LC, south of Lange- 

 witli monosporangia, partly emptied, land; F'emerbelt: UL and KX. — lib: XZ*, Davids Ranke, 1 !) —20,5 met. 

 li, filament with lelrasporanf?i.'i. -fKl:!. 



24. Chaiitraiisia i)ectiiiata Kylin. 



Kylin (1900) p. 120. 



I have repeatedly met with a Chaniransia agreeing with Kylin's description 

 and figures of this species, which appears to be related to Ch. efflorescens. The 

 onl}^ discordance is that in some cases I have found free descending filaments near 

 the base of the erect filaments, while Ch. pectinata according to Kylin is distin- 

 guished from Ch. efflorescens just by the want of such filaments. They occur how- 

 ever seldom and are not so long as in the latter and they appear to have partly 

 the character of stolons, growing out in horizontal direction (fig. 65 C). In spite of 

 the presence of these filaments I regard the two named species as quite distinct, 

 Ch. pectinata being characterized by thicker filaments, shorter, more thick-walled 

 cells and by the sporangia-bearing branchlets being seriate on the inner side of the 

 lateral filaments. 



