BIOLOGICAL STUDIES OX CORYMORPHA. 



28 3 



(Fig. 2, a); it was replaced by another hydrunth that at the end 

 of ten day- \va- in tin- condition shown in Fit;. 2, b. No. 2 wa- 

 a similar < ase. In neither of these case- wa- re\er-al inhibited. 

 No. ;> died. Mo. 4 is represented in i the proximal hydranth 



bcin^ in in -1 1 li ---d -\ doped than the distal, and the plain- of -cction 

 g near but not immediately distal to it. In four days both 



V 



FIG. 3. 



nentB p"--e--ed frustulcs; the proximal set; men t had, accord- 

 ingly, r< I ompletely. No. 5 (Fig. 4) exhibited a noil, 

 ot complete iv\ei-.il in the proximal .segment; both sev;iUfn!- 

 \\. M- .1- -houn in I i.;. 5 .it t he end of five da> No. 6 wa> a 

 -iinil.ii No 7. i ut \\ln-n in the c-.ndition shown in 1 i. 



appeared, five days later, as -ho\\n in l-'i^. 7. No. 8, a similar 



case, exhibited -imil.irl\ a complete re\ er-.il in li\ e days. No. M 

 aibled I-'I'L;. 2. ,1 ; but it was the smaller, proximal hydranth 

 that was removed, by a CUl immediately di-tal to it ; in -e\ en d.i\'s 

 a lieu ludranth \\a> e-tabli-hed in it- pla. 



\< . >rdint; to the-i- iv-ult-. heteroinorphic piece- pnuluce hold- 

 fa -ts .11 the \\ound when sectioned approximately midway bet \\een 



the h\draiuh>, but i)ro<luce ludranth- at the wound on tin- longer 

 piei .-- iii tho- 9 in \\hich either ludranth has been removed 



by a cut immediately bclo\\ it. 



