_a._ In the Gulf of Aden (149).
_b._ Probably between 40° lat. and 20° lat. S., and between 50° and 70°
long. E. (123).
_c._ In lat. 2° N., long. 90° E. (147).
_d._ In the Malacca Straits (146).
_e._ Near the coast of Australia (136).
_f._ In Geographe Bay (150).