Production of New Hydranths in Hydra 23 
LITERATURE 
HEFFERAN, Mary ’o1—Experiments in Grafting Hydra. Archiv f. Entwicke- 
lungsmech. Bd. xiii. 
Kinc, HELEN Dean ’o1—Observations and Experiments on Regeneration in Hydra 
; viridis. Archiv f. Entwickelungsmech. Bd. xiii. 
°o3—Further Studies on Regeneration in Hydra viridis. Archiv f. 
Entwickelungsmech. Bd. xvi. 
Morean T. H. ’o1r—Regeneration. 
*o8—Experimental Zodlogy. 
PEEBLES, FLORENCE ’00—Experiments in Regeneration and in Grafting of Hydro- 
zoa. Archiv f. Entwickelungsmech. Bad. x. 
Ranp, HersBert ’99—The Regulation of Graft Abnormalities in Hydra. Archiv 
f. Entwickelungsmech. Bd. ix. 
Wetzex G. ’98—Transplantationsversuche mit Hydra. Archiv f. Mikr. Anat. 
Bd. lii. 
Wuirney, D. D. ’07—Artificial Removal of the Green Bodies of Hydra viridis. 
Biol. Bul. Vol. xiv. No. 1. 
