Vou. 2] Torrey.—Hydroid Differentiation and Senescence. pal 
August 8. Nos. 12 and 13 regenerated, each with 1 annulus in 
pedicel. 
Result: regeneration according to the local, not the basal 
structural type. 
Further experiments of this sort are unnecessary to show con- 
Figs. 1, 2. Normal regeneration from distal wound. 
Fig. 3. Normal regeneration from middle region of stem. 
Fig. 4. Heteromorphic regeneration from base of stem. 
The arrow indicates in each case the level of the cut. 
