110 j. G. Agardh. 



XV. Chamsedoris Munt. 



Iconibus jam a Solandro datis satis constat plantam, quam Corallinae 

 Peniculi nomine primus descripsit, quasi duabus partibus, quas heteroge- 

 neas facile dieeres, compositam esse. Coma nimirum terminalis, filis plu- 

 rimis adparenter Ccmfervoideis constituta, sustinetur stipite tubuloso mo- 

 nosiphonio transversim annulato, qualem consimilem in pluribus Siphoneis 

 obvenire novimus. Genus novum, bis characteribus fundatum, primus con- 

 didit Montagne (1842), quod tarnen jam antea suboluit Lamourouxio. 

 Idem paulo postea (1850) proposuit Ducbassaing (Anim. Radiair. des An- 

 tittes /i. 28) sul> nomine Cephalothrix, cujus species tres diversas qnoque 

 enumeravit, quas forma coma3 terminalis praecipue diversas statuit. Utrum 

 vero formse hoc respectu diversae sint species propriae, an stadia evolu- 

 tiouis constitnant, dubitare liceat. 



Si de Penicillis assumere opportet comam quandam jam in infantili 

 planta evolutam fieri, contrarium obtinere videretur in plantula Chamae- 

 doridis, cujus stipites erectiusculi, et numerosi, socialiter crescentes, initio 

 coma destituti, longitudinem 2—3 pollicarem attingere dicuntur antea 

 quam rami primarii comse excrescere incipiant. De hac evolutione se- 

 quentia habet Harvey: When this (the annulated tube) has attained the 

 height of 2 — 3 inches it ceases to grow longer; a septum is formed just 

 below the summit and a new cell begins there to develope. This second 

 cell is very short and again divides, once or twice, vertically; so that the 

 original tubulär cell (now te be called the stipe) is crowned with 2 or 3 

 minute cells placed one above the other. the terminal one beeing atte- 

 nuated and pointed. These cells remain short and rudimentary, but from 

 their nodes dense whorls of ramelli begin to grow" (Harr. Ner. Bor. Am. 

 /i. 43). Articulos ejusmodi plures in supremo vertice stipitis generad, a 

 quibus ramorum verticilli (diversi) provenirent, mibi observare non con- 

 tigit. Sectione facta longitudinali stipitis adultioris totum intus tubulosum 

 observare credidi, membrana ambiente crassiuscula, membranulis numerosis 

 composita; a facie obsen ata quasi striis longitudinalibus membrana notata 

 videtur. Si membranulani inferiorem a supremo vertice stipitis separare 

 contigerit, quod facilius fit. videre licet haue membranulam non tantuiu 



