Amblypygi — TAKASHIMA 
337 
Fig. 1. Dorsal view of Charon grayi, female, from Botel Tobago, near Formosa. After Kano. 
can ascertain, we have counted 1 1 examples — 
nevertheless it seems uncommon there. The 
fact that, in Micronesia, it is found only in 
the Palau Islands shows a close zoogeograph- 
ical affinity of these islands to New Guinea 
and the Philippines. Fortunately I now pos- 
sess 4 specimens of the 11 that have been 
obtained in Micronesia. 
In 1936, the same year in which Dr. Esaki 
obtained his specimens, Dr. Kano, an able 
Japanese biogeographer (unfortunately miss- 
ing since the war), found this species in a 
stalactite grotto on Botel Tobago and pub- 
lished an account of it in the following year. 
Four of his specimens were given me, and, 
to the best of my knowledge, these are all 
the Botel Tobago specimens in existence to- 
day. I am further fortunate enough to have 
had an opportunity to examine specimens 
from Mindanao, Java, and Bougainville Is- 
land. In these various specimens, I am able 
to detect a secondary sexual character in this 
species. The femur of the pedipalp in the 
male is longer than the second, the third, and 
the fourth pairs; in the female, the femur of 
the pedipalp is quite similar to those of the 
other three. I believe this is the most easily 
distinguishable secondary sexual character in 
this species. 
During the breeding season, the female of 
this species has an egg-sac on its abdomen. 
One of the two specimens which Mr. K. 
Sekiguchi captured on Koror in the Palaus 
was only 7 mm. long, which led me to believe 
that the one whose body measuring about 
10 mm. was still in a juvenile stage. Yet I 
found later that it already carried an egg-sac, 
so I concluded that it must be an adult. This 
