from a fish in the act of spawnings when treated with milt, have 

 a diameter of about 1 mmo Unfertilized mature ovarian eggs have 

 a diameter of Oo8 - 0o85 mmo , which does not differ much from 

 the size of the eggs of other specieso In eg^s at this stage 

 of ripeness there are two oil globules, but it is thought that 

 later these form a single globuleo Surrounding the oil globules 

 there is an indefinite pale yellow nimbus j but there are no 

 structures on the vitelline membrane and the egg as a whole is 

 clear and almost colorlesso Nothing at all is known as yet 

 about the larvae and their development. 



With regard to the sailfish there is a comparatively large ^ 

 amount of data. The juveniles of the sailfish of the Atlantic *■ '' 

 have been known for a long time,, The areas and seasons in which 

 the author has collected ripe eggs and larvae in the Southwest 

 Pacific are as follows s 



Month and Ye sir Area Ripe Eggs Larvae (length in mm,} 



12 - 31 Banda Sea / — 



18 - 31^? Sic^ Formosan waters / --- 



4-7 



7-35 Eo of Formosa / 140 



8-41 Nhatrang 700 - 750 



In addition to these, Uchida^^^' has reported a juvenile 

 of about 7 mrn„ body length from Satsunan waterso 



Spawning is carried on with a male and a female paired or 

 with two or three males chasing a single f emale p and this act 

 can be seen often during the spawning seasono The ripe ovarian 

 eggs are about 0o85 mm, in diameter and they have a single oil 

 globule. Around the oil globule there is a pale yellow indefi- 

 nite nimbus o There are no structures on the vitelline membrane 

 and the egg as a whole is almost colorless and clear^ 



v^^ Guntherj, A,, I88O0 An Introduction to the Study of Fishes, 

 Londono 



''^'' Uchidaj, Keitaro'c 1937o On the Flotation Mechanisms Seen 

 in the Larval Stages of FisheSj, Science 7o Iwanamio 



42 



