186 SUMMARY OF CURRENT RESEARCHES RELATING TO 



spheerosporse intra cellulas strati corticalis extimas generataB, validae, 

 zonatim quadradivisas. 



Gloiohymenia, near to Gloiocladia. (Gloiohymenia ornata — Callo- 

 phyllis ornata J. Ag.) 



Hymenophlsea (separated from Halymenia). Cystocarpia intra peri- 

 carpiuni demura subglobosura, supra frondem eminens, apice carpo- 

 stomio pertusum, nucleum subglobosura simplicera a piano basali ereo 

 tiusculum, filis tenuissimis, invicem superne quasi liberis simpliciusculis, 

 moniliforruibus, quoquoversum sursum radiantibus contextum, gemmidiis 

 intra articulos elliptico-oblongos numerosis seriatis. 



Collimia ; a new genus with, tbe habit of Iridaea, but nearly related 

 to Grateloupia in the structure and arrangement of the cystocarps. 



Heterocystis ; founded on Chrysimenia Enteromorpha Harv. 



Helminthiopsis, separated from Hehninthocladia. Cystocarpia intra 

 stratum filorum corticalium immersa, corymbo ramellorum iuvolucran- 

 tiuin cincta, gemmidia dense conglobata foventia. 



Ardissonea g. n. Helminthocladiacearum. Cystocarpia certo loco — 

 infra apices acuminatos ramulorum conspicue intumescente — circumcirca 

 generata, intra stratum filorum corticalium, hoc loco magis evolutum, 

 nidulautia, subglobosa, demum in gemmidia pauca sine ordine bene 

 conspicuo secedentia. 



Emhsira, allied to the Helminthocladiaceae. No reproductive organs ; 

 the vegetative organs only are described. 



Haliacantha g. n. Wrangeliacearum. Cystocarpia a ramo nudo late- 

 raliter erumpente transf'ormata, fasciculum terminalem, gemmidiis pyri- 

 formibus quoquoversum radiantibus validis contextum, ramellis elongatis 

 melioribus involucrantibus cinctum continentia ; sphasrosporaB in ramellis 

 monosiphoneis external et subsingulaB, demum in ramo adparenter jjropriu 

 inter cellulas ejusdem provenientes iuimersaB, triangule divisaB. 



Micropeuce g. n. Rhodomelearuni, most nearly related to Triyenea. 

 Sphasrosporas inter apices ramorum polysiphoneos provenientes, ob ad- 

 paratum ramulorum bracteantium in stichidium quasi strobilaceum 

 conjunctaB, intra cellulas stichidii brevissirnas, spirali ordine parum 

 conspicue dispositas, singulaB provenientes, demum eruptaa in axilla 

 ramulorum receptaB, validaB, quasi granulis formataB, triaugule divisaB. 



Some general remarks are appended on the structure and arrange- 

 ment of the cystocarps, sphaarospores, and antherids in the FlorideaB. 



The following new genera are also described. 



Pyropia g. n. near to Porphyra. 



Scsenophora g. n. Fucacearum, most nearly related to Cystosira. 

 Frons pinnatim decomposita, caule proprio ramisque firmioribus tere- 

 tiusculis, ramulisque conspicue diversis, capillaceis, ex tereti compressis, 

 dichotome subjiinnatis, corymbos laterales et terminales formantibus ; 

 vesiculaB nullaa ; scapbidia in ramulis capillaceis, aliter non transfor- 

 matis, inflata, sparsius v. densius superposita, interjecto spatio sterili 

 longas series plus minus conspicue moniliformes formantia, singulis sub 

 utrinque prominulis, ubi densiora in seriem moniliformem conjuncta. 



Rhodochorton islandicum, a new terrestrial Floridea.* — L. K..1- 

 derup liosenvinge makes an addition to the very small number of terres- 



* Bot. Tidsskr. xxiii. pp. Gl-78 (4 figs.). See Bot. Centralbl., lxxxiv. (1900) 

 p. 378. 



