292 



.iDiis. liovi-: i'i;Ti:nsi:N 



VIII. Microcoleus Dcsmn/.iert's. 

 Microcoleus vaginatus Viiiuli. (iom. v:ir monticola Kfilz Com. 



30 



/5 1X9") 



N. W. Ii-el. l)vr;irji)i(^iir. moisl |)lafc'.s ne:ir thc shorc 

 (C. H. O.)! 



Area: L'biquist. Spitzbcrgcn, Alaska. 



Concerniiif^ Iho distribution of var. inonlicold hardly aiiythiii«^ ccm'- 

 tain is known; Ihcrcfore I bave given the area ol tbe wbole species. It 

 is particnilarly a ti'rrcsfrial form, whicb but rarcly bas been mef with 

 in water. On tbe Icelandic locality it grew togetber witb Ij/ru/hi/d 

 (fslnurii and S/)irulin<i lahijrinlhifurniis. Tiie soil bas j)resuinably tben 

 been somewhat saline. 



Microcoleus Steenstrupil Hoye P. n. sp. 



-M. lilis 30—65 // crassis, simplicibus vel parce pseudoramosis; va- 



ginis dislinclis byali- 

 nis, vix laniellosis, 

 usque ad 20 // crassis, 

 cblorozincico jodurato 

 cocrulesc-entibus; tri- 

 cboiuatibus intra vaui- 

 nani plus niinusve nu- 

 merosis, sæpe funifor- 

 mi-contortis, 3—5 // 

 crassis, articulis 3—8 /i 

 longis, ad genicula vix 

 constrictis (in sicco); 

 protojjlasuiate granu- 

 loso; cellulis apicalibus 

 usque ad 13 it longis, 

 obtuse conicis, baud 

 capitatis, sine calvptra. 

 Fiii. 1». 



^^m 



Fig. i). Microcnleiis Slernslrnpii n. sp. 



a. I'urt of a tliread (^xfiOOi 



b. .Ape.x of a triclionie (AlliOO). 



S. Icel. Hot spring 

 at Reikir, on tiic mar- 

 gin itself, lemp. of sjiring 



,. , 10()"-102" (Stp.)!L:au- 



garnar Reykjavik (Stp.)! Gullfoss, moi.st cartb ^'/s li)22 (M. L.)! 



Tbe present form resembles in cerlain rcs|)ccts M. iw(/irwtiis but is 

 distinguisbed from it by tbe absence of calvptra and bv tbe faet tbat 

 chlor-zinc-iodinc colours tbe .sbeatb intensely violet. It seems to be closer 

 relaled, bowcver. to .1/. laruslris (Rab. Farl.; but it dilfers partlv in ba- 

 ving an otber babitat, in tiiat M. lacnslris lives in walor, wbcreas M. Slrrn- 

 strupii grows on land. partly in several morpbological features, esjjecially 

 (1) tbe cells being sborter in M. Steenstnipii and (2- cblor-zinc iodine 

 colouring tbe sbeatb beautifully violet wbich is not tbe case in M. la- 

 cnslris. Tbis is staled by Gomont in bis Monogr. I p. 359, and I bave 



