272 



Jol IS. n(v\i; i»i;ti;hsi:n 



II. Chamæsiphon A Hr. ti (iiiin 



Chamæsiphon cylindricus \U>\v 1'. ii. sj). I"if<. 2. 



(^h. j^()ni(l;iiij;iis sliiiio c\ linciricis, 2—2.5 // crassis, 11 — 13.2 // longis, 

 rectis. ba.si non angustatis , (i<^. 2. a -d , vol l>rcvissimc slipilalis (fij^. 2, e), 

 viil«i() inaiiirulalis. inlerciiim supernc duoljiis f^onidii.s; vaginis achrois 

 a|)icc leniiihiis. ba.si incrassatis ; contcntu ccllulariini j^ranulato. Hpipliy- 

 lica in (".ladophora sp. 



N. icei. On a lakc-niarj^in abovc Hi'isavik ^^li 11)14. 



This species is most closcly relalcd to C (ifriraiiiis and ^'. iiiiiiinuis 

 ^ ' Schniidle 1902 p. 62, tab. II, 



fig. 3 . In dimensions it formsan 

 inlermcdiatc betwcen tlie two spe- 

 cies. I'^rom C. afririinus it is 

 chiclly distinguisbcd by llie shcath 

 not being tbickened at the apex; 

 fiiiibermore it is very rarely 

 providcd with any distinct stalk, 

 this being at anv rate never so 



a 





M 



Fig. 2. Chantd'siphoii cylindriiiis 

 n. .sp. (X1200). 



distinctly developed and so thin as in C ufricanus. 



Chamæsiphon incrustans Grun. 

 Dc'-'lOni. .S\iloge Alg. vol. V p. 136. 



N. Icel. Slutnes olF GrimstaLiir Mvvatn\ on leaves of moss ^^/i 1914, 

 tenip. 17'/2^. — .S. Icel. Holmsa, temp. 14^ on Cladophora. ^^'8 1914. 

 Area: — Eur., As., Afr., Am., Austr., Færoes, Spitzbergen. 



This species seems to be distributed all over the world and is found 

 on a nuniber of various species of Algae, on Cyanophyceæ as well as 

 Chloroi)hyceæ. especially, however, on si)ecies of Cladophora. It has 

 been met with in stagnant as well as running water and seems even 

 able to thrive in brackish water. Fritsch el Stephens 1921 p. 61 . 



Chamæsiphon curvatus Nordst. 

 Nordsl. 187« j). 4, tab. I, fig. 1—2. 



W. Icel. Geitabergsvatn, on moss neai- the margin, lemp. 12'' 

 Vs 1914. 



Area: Fur.. As., .\iislr.. Novaya Semlya. 



The form in (pieslion agrees in all respects with Nordstedt s species, 

 but il lacks the nnuilaginous coating which the figures (I. c.) seem to 

 indicale. 



