Ecology of Marcus Island-— SAKAGAMI 
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Fig. 18. Food-nexuses in Marcus Island. 
sus (abundant), Geograpsus crisipes (less abun- 
dant), and G. grayi ( abundant ) —only the last 
species still remains on the island. According 
to a personal communication from a staff mem- 
ber of the weather station, he is sure that at least 
one species of land hermit crab still exists on 
the island. But it is uncertain whether this 
species is either Coenobita olivieri or C. com- 
pressa reported by Bryan, for no specimens were 
collected by myself. 
It is very regrettable that Bryans collection 
of insects, which he made by various methods 
(including lantern collecting, barking, attract- 
ing with decaying flesh, etc.) was damaged by 
ants and other pests during his return voyage. 
His miscellaneous notes based upon memory 
are so interesting, however, that I will cite them 
here: 
A small red ant was quite common as well as 
troublesome, especially about the settlements. I 
fancy it had been imported since the colony was 
established. Two species of flies were very abun- 
dant, one a blowfly ( Callipbora ? ) which per- 
sisted in laying its eggs on the birds both before 
and after they were skinned; the other species, 
a small vinegar fly of a genus unfamiliar to me, 
