No. 625] HTBIUDS AMONG SPECIES OE SPIROGYBA 1 13 



In collections from Cossel (-reek, about one mile west 

 of Chaile^ton III m ule duimo Af n Vn4 and \])ril 

 11)1 T). a similar mixture of forms was round associated 

 with til uiunt ot t\ j.K il / / M/ uid p >t, il, It \N i«> 



tlu (llM()\U\ ot llu ( I itK 1 ( l|. tlnn 111 I'll , th It ud 

 llK to ^O ON(l tll( (Olh( tion h .11, ( Mil! U (M.I I Mil 



and the prevums colle('tu)ns fioni ( o^cl Creek. In all 

 cases the tonus seemed <]uite cxi >ii('al)lc on the a->imip- 

 tion that livhi'idization had occiii rcii m jireN Kiiis xcars as 

 it was occurriuo- when the collections were made and that 

 the piootiu ot th( Inbiid /X.. 1 ( i( 1< w.d \ ninu 

 combinations ot the characteristic.- ot the \yAvv]\\ >iiecies. 



Fertilization m Spiro(fi/r<i takes niace b\ the tusion of 

 two g-anietes throu^-h a tulx^ lornied bv the union ot 

 euui^didv tiom two idioini . . II ii tn. nm oi dif 

 finnt fihnunt llu /n.< t ok mitiiK it u ill withm 

 tlii(( oi loui d i\ itt( 1 th. I I u. ol th. „ in . 1. 



In tlu 1 n_. I .< 1. s ^11, i> ; / 1 h i\. w I. lud 

 the nioveiiH'iil ami fu^i.iii of the uani.'te>. The male 



Toj.hvll th.'ii tui'iN brown and -tain- the 

 Ml it .-an b.' -eeii thronah th.' niMtiirinu- 

 v,i il .lu Diiiuu till 11 1 it .1 idu 



