DESIGX LV THE ORGAXIC WORLD. 



453 



&quot; simple.&quot; The first-formed series of chamberlets (///, w 1 , w 2 , ///&quot;, 

 ///*) exactly correspond with those of the &quot;simple&quot; type (Fig. IV., 



m 



;-&amp;gt;%-, . .&quot;.; 



II 



Fie. VI. 



1. I&amp;gt;i-k of Duplex type of Orbitolitc. 



2. l. l^c of Disk, showing double row of marginal pores. 



3. Central portion of Sarcodu Ixxly : ti, primordial segment ; / , ciirum- 

 nnilic-nt si-gment, budding off a half-ring of sub segments, from which 

 complete rings are afterwards formed. 



4. 1 or! ion of the Sarcodic body of one ring ; a a and b /&amp;gt; , the two halves 

 of the columnar sub-segments in connection with c i , the annular cord ; from 

 this are given off the pairs of stolon-processes d a , d &amp;lt;/ , which connect it with 

 the sub-&amp;gt;cgmcnts of the next annulus. 



