HETEROMORPHOSIS 167 
I always found that new tentacles were formed only upon 
the oral edge of the piece cut from the animal, while a new 
foot was formed only at the aboral end. Even though I 
have not thus far been able to cause a head to develop at the 
aboral end in Actinia as in Tubularia, still I consider it 
probable that this also will succeed because of a note I found 
in Contarini’s Trattato delle Alttiniec,' according to which 
Diquemare,’ who worked on regeneration in Actinia, once 
noticed such a heteromorphosis. A piece cut transversely 
from an Actinian “ riprodurre in vece di un piede degli altri 
tentacoli e un altra bocca, cosi mangiara da due parti nello 
stesso tempo.’’* 
2. In these experiments the Actinia equina of the East 
Sea* behaved in some respects differently from Cerianthus. 
When I cut transverse pieces from Actinia equina, they 
formed tentacles only, and these without exception at the 
oral pole; I never saw a new foot formed upon transverse 
pieces of this animal. The wound only healed at the aboral 
pole; no regeneration whatever occurred here, and the body- 
cavity of such an animal communicated with the outer world 
at both poles. Most remarkable, however, was the fact that 
both poles took up food, the aboral mouth being even more 
voracious than the normal mouth at the oral end. Substances 
were swallowed by the aboral mouth which the oral mouth 
as arule does not take up. If a paper wad soaked in sea 
water is laid upon the normal mouth of an Actinia equina 
of the East Sea, it is not swallowed; while a piece of crab 
meat, which by our tongue cannot be distinguished from the 
taste of the paper wad, is immediately taken up by the 
animal. I tied a paper wad to one end of a stout thread 
IN. ConTARINI, Trattato delle Attinie (Venezia, 1844), 
21I have not been able to obtain Diquemare’s work. 
3 Very recently Professor Torrey, of the University of California, has observed 
heteromorphosis in an Actinian. [1903] 
4The Actinia equina of the East Sea is not identical in its physiological behavior 
with the Actinia equina of the Bay of Naples. 
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