24 



'^rirar;^ rc't bra-^r^hes, rivinrr c,ff: one or '.'.vc seccr^dary 

 roots; so that v.-hen the hydra-^th is develcrpd it rfiay have 

 tvc, thrpp or four hydrcrhiza, e? shew-" in Firurer. 27 - Z2, 

 The settlirp- drvr a-d attach-iert of the ^lanula of S torno - 

 toca ari cat a is vnry much liVr- that ivhich takes -^.lace in 

 Turrito-'sis nutricv.la, the develo-rrTit of v/hich v.'ill be 

 described ir a- other rearer. 



Frcfe::scr Brccls ir his v/crl" or "The Life-History of 

 Eutira" (I'c^) has shcwr that the rlarulae of Eutira, 

 Tuilii-Prsis and Hj/dractiria fcrr rccts a-d that the hydranths 

 arise as buds fror the roots. 



DEVFI.'-^-rFJ'T CF THE HYDFA'TH. 



Zfter the larva han becore attached it very s'on ce- 

 velc'S a bud, f^ererally at about the ce-tre of the root, 

 v/hich is the bepin-inr of the hydrarth. A circle of srall 

 prelections irake their anwearance very enrlv around the dis- 

 tal end of the hycranth bud; ther^e are the rudinents of 

 the trntacles a-d are usually fivr i- r-u'^'ber. Cicasio'-ally 



