G6 



fhe ^ ?ho?^ }^ ^^""' "^"'* ^'' regarded as one of the lowest of 



one InvPW ^rP'^^/^^" than Scy^os:J>/;o», where there is more than 

 snar\nl ! fu^-'^''^ r'^""'^ '^^ ^^^'"^^^^ ^^ ^o^^^^^d with plurilocular 

 trj^/fZ7 '' J"" '^^''''''"''''''" «^e ^e<^^ the relationship of 



ToSIlr/T'J '"^ '\^ ^/^r/./.«. in their lowest representatives, the 

 PrasoL Tf\''"' '}^ ^^^'^' ^^"d' '^ ^he Chhros/oreaein the genus 

 Hous anH .^. f f "^' °^ ^/^a.^w«^« C^///W/ are generally grega- 

 srowintofi r™ ^ ^^'^^O'^ ^^^^ of cells, anfof which n°ay 

 lonTitudrn^,1"'-^^^""^J"^,,^«™PO^^d of a single row of cells. By I 



conSrof t ^. '"""'P' '^' ^'^"^^"^^ "^^'' '-^ f^°"d is formed 



Xq elt^'t r,::;:: ^nr"!.^ 'i"^- '^ ^ ^'"^le apical cell. By 

 frondisfornl? and radial divisions, a tubular or saccate 



of he JuZt'T''^-'^^''^ ^ '^'^g'^ thickness of cells. The division 

 U re fron'f eTc? .T" 'f 'i''^^^^' ''^''^''' ^"d' ^^hen the plant ma- 

 a certabed . 1 "''^'' '^'''^''°"' '^'"'^ '' ^0™^^' ^' ^^^ ^' could be 

 clrle ^cell J n^ ' n°fP"'" ^^^^'^ ^^^^P^^ ^"d leaves behind the 

 ineTbv Le h;dlo. ^"^^ ^ ^"^"" ^^'"^^^ °f ^^^ specimens exam- 

 inadon had con? t^" zoospores; and these, at the time of exam- 

 Iboi? [he numT "" r V'° *^^' '* ^^^^ impossible to tell anything 



necessarv The ° ''^'\ ^^ '^^^ P°^"t ^^^^^^^ examination i! 

 necessary. The genus may be provisionally characterized as follows: 



PHAEOSACCION, Farlow. 

 layer'of ceIIs°dkr;n'''J"' J"^^'^^'^^ ^^^^^te, composed of a single 



gari::;s To^rJ^red^yh^^^^^^^^^^^^ subgel^tinous. gre- 



inches lon^, at first saccate h/ ^ "" V T ' V'^^^' ^^^"^ ^"^ 

 ruptured Celk smLli ?' becoming cylmdrical, apex at length 



On zX^ Litt^Nnh '^•^r^^^''^"^ ' frond 8/.-roV. in thickness. 

 ^osU,a. Little Nahant, Mass., m early spring. Mr. F. S. Collins. 



men. !!?"#/ '^^ -P'"'"'' '^^'^^^^ ^^o"^ Rev. Mr. King were fine speri- 

 SeltroTntfri^' ^^"^ f ^'^^ ^ ^-^ 1-g- They 'were 



them to Srgrovvn aTtTe^'l.o^'tl/'rT?^' ^"^ "^J" ^^"^ supposes 

 the snecimen. rfJf f, '^?V^'' °^ Edgartown Harbor. Some of 



and bea itrw^ kn^^'''T^^^^'''■"P^"^ specimens of the species, 

 of the spec m;;fwvr ^"^'o^^lar sporangia in abundance. Some 



the brS™fs CO e ed'''^rV"?f " T^ '^'"^^^' ^"^ the surface of 



Have never befo? been s'en ' The'^n ft r'^"^"''' J'"'^'^ ' ^^^^^^^ 

 sporangia resemble those beaHn^ ?ie ' ^f^''?^ '^' plurilocular 

 structure althouah\^ W ^^^""S' ^^^ unilocular, m microscopic 



they are!'ho^evef ^ol d^nT "ff' u''' ^^^'' '' ^"^^ ^'^'^ ^^^nder; 



speL^e^s, buri:'^;tryo' ng'sta: fe.'h " '" i^?f ''^'^i' ^^^.^^^^^^ 

 not that one of the uni o?nl.r"K '^^'^^''"^''' ^^^ ^ s^^d frond. Were it 



was as small and slenrW .'^^ ""''u^ specimens sent by Mr. King 

 should have h"esit ^d' ^ 'con'tdL'T"^" Plunlocular s'porangia, f 

 ing to the same snecies Th' • ^ specimens as all belong- 

 semble those of R7c"a'a a e r'^T^'''- ^PO'-angia, which re- 

 branches, and soniethetX' ^'^^^"^^^d scattered over the larger 



50"^et.mes also on the smaller polysiphonous branch- 



