aOO Algen. 



in articulis superioribus gemmidia fasciculatim conglobata, muco cohibita, gene- 

 rautes. Sphaerosporae — — . 



Amylophora J. Ag. msci. 



Frons linearis, ex ancipite complanata, prolificationibus a margine aut 

 intra niargineni exeuntibus decomposito-pinnata, stratis fere tribus contexta: 

 intimo valido, filis simplicioribus invicem liberis curvato-flexuosis longitudinaliter 

 excurrentibus, intra nierabranam crassam continuam endochroina tenue foventi- 

 bus ; iuterniedio cellulis rotundato-angulatiis, interioribus inter flexuras filorum 

 formatis, exterioribus invicem adproximatis, omnibus (saepe) granulis amyli 

 dense conglobatis farctis ; exteriore cellulis minutis ßubpluriseriatns contexto. 

 Fructus — — . 



Peltasta J. Ag. 



Frons compresso-subplana, dichotoma, subfastigiata, segmentis patentibus 

 linearibiis, apicibus obtusis demiim in peltas spbaerosporiferas intumescentibus ; 

 stratis fere tribus constituta ; cellulis nimirum intimis longioribus compres.sis, 

 endochroma coloratum foventibus, duplicem seriem paginibus parallelam for- 

 niantibus; intermediis rotundato-angulatis pluriseriatis dimidinm longitudinem 

 interiorum vix superautibus, adparenter inanibus ; corticalibus minutis rotundato- 

 cubicis verticaliter superpositis. Cystocarpia .... Sphaerosporae ad apices 

 segmentorum peltaeformiter dilatatos, truncatos aut emarginatos, inter fila strati 

 corticalis paulisper longiora immersae, oblongae, zonatim divisae. 



Amjjhiplexia J. Ag. 



Frons stipitata obovato-saccata (exsiccatione ?) collapsa prolificantibus con- 

 formibus parce ramosa ; strato interiore filorum anastomosantium membranam 

 externam, duplici strato contextum, sustinente; strato (ipsius) membranae interiore 

 cellulis raajoribus rotundato-angulatis, extrorsum supra medium discum nudis; 

 exteriore cellulis minutis, interstitia iuter cellulas majores obtegentibus ; utroque 

 strato monostromatico. Cysticarpia supra frondem emersa subspbaerica, carpo- 

 stomio rupto aperta, nucleum compositum, placentae basali adnatum, foventia ; 

 fila placentaria alia interiora et breviora, alia exteriora intra parietes pericarpii 

 circumambientia et cryptas subdistinctas separantia, gemmidia obovata in ramis 

 filorum a paiietibus cryptarum circumcirca provenientibus articulatis et clavatis 

 generantia. Spheerosporae . 



Cyclospora J. Ag. mscr. 



Frons ex tereti compressa, ramis a submargine rotundato distiche exeunti- 

 bus pinnatim decompositis inferne ramosissima, rachidibus superne mediusculis 

 saepe subcaudata, adparenter immerse costata et oblique transversim zonata, 

 duplici Strato contexta; cellulis nimirum interioribus majoribus circa centralem 

 in orbem dispositis, costam formantibus, et extra hanc per unicam seriem mar- 

 gines versus exeuntibus, utrinque (paginas versus) minoribus obtectis Stratum 

 interius polysiphoneum formantibus ; strato corticali subproprio, fere gelatinoso, 

 cellulis minoribvis subverticaliter seriatis contexto. Cystocarpia .... Sphaero- 

 sporae triangule divisae in articulis numerosae, verticillatae, intra sticliidialaucoidea 

 vix transmutata evolutae, series reguläres a costa margines versus exeuntes den- 

 sissime dispositas mentientes. 



Die in der Arbeit neu beschriebenen oder benannten Arten sind : 



Perithamnion Ceramioides, P. arhuscula, Spongoclonium Wilsonianum, Lopho- 

 thamnion comatum, Halymenia digitata, H. Floridana (^ H. ligulata Harv.), 

 Iridea Australasica, Kallymenia demissa, Ozophora Califoi-nica, Hymenocladia 

 filiformis, Gloiosaccion pumilum, Chrysymenia Dickieana, Plocamium Sandvicense, 

 Leptocladia Binghamiae, Sarcodia marginata, Stenociadia rainulosa, Ämphiplexia 

 Hymenocladioides, Rhahdonia compressa, R. racemosa, Encheuma jugatum, Chon- 

 driopsis suhopposüa, C. arborescens, C? cartilaginea, Cyclospora Curtissiae, Pollex- 

 fenia nana, P. crenata, Amansia Hawkeri, A. Robinsoni, Polyphacum intermedium, 

 und Placophora {?) cucullata. 



Wille (Aas b. Christiania). 



