83 
The more remarkable is a case of undoubtedly protective re- 
semblance in an Actinian, which I observed in New-Zealand — a 
small brown form living on a Fucoid alga in rock pools, resem- 
bling the peculiar small branches of the alga to such a degree in 
shape and colour, that it was very hard to distinguish. This Actinian 
then is probably not unpalatable and may serve as food for fishes 
or other animals (— as is the case with some other Actinians — 
McIntosh, p. 225), otherwise it would be hard to see the inean- 
ing of this evident protective resemblance. 
VH: Observations on Insects, 
»Double-headed" Butterflies. 
Although the author could afford only very little time for col- 
lecting and studying terrestrial animals, some observations on pro- 
tective habits and adaptations were made, which would appear to be 
partly new and worth mentioning. Being no Entomologist I am, 
of Course, by no means fully acquainted with the litterature on 
this subject. When, in spite of that, I venture to publish this 
record of my observations, it is because I think they may be of 
Some use, even if they are not new. My observations are made 
entirely independently, so to say unintentionally, without any pre- 
conceived ideas or wishes to find instances of mimicry, protective 
resemblance or the like. And, in any case, independant observ- 
ations are not entirely without value, even if they contain nothing 
new — In his book ;,Noch einmal Mimicry, Selektion, Darwin- 
ismus” (1909) M.C. Piepers says (p. 141): , Untersuchungen uber 
die Mimicry jetzt noch als ein Desideratum zu bezeichnen . 
Scheint mir durchaus unangebracht zu sein. Untersuchungen sind 
tiberreichlich vorhanden ..... « "I do not quite agree with this 
rather apodictical statement. Careful observations will never be 
Superfluous; even observations made by »globetrotters", as Piepers 
Puts it scornfully (p. 145) may be of some value. »Careful observ- 
ation of the living insects is worth any amount of arm-chair theo- 
rizing, however ingenious" as says Shelford very justly (Op. cit. 
P. 214). 
I want to state expressly that I have no intention of entering 
on a discussion of the problems of Mimicry. I had not made a 
6? 
