% 



center of the yolk, but in the Pipefish many small orange-red 

 globules are imbedded in the periphery of the yolk. When 

 the protoplasm moves up to the animal pole, the oil globules 

 go also and are collected under the germ disc to form the 

 " disque huileux " of Lereboullet, This is a phenomenon very 

 eleosts. It has oeen reported by all workers 

 on the Salmonoids, by '37) for the Stickleback , 

 Kowalewski f '86) for Carassius . and by ... 's, ithk 

 ( '37) first described these processes i i « - 

 Black Sea, T: c says t disc is formed after 



the eggs come into water, and that the yell* fett "drops 

 which surround the yolk flow up to )ut under the 



disc in a layer covering about one-third of its upper sur- 

 face. Kupffer f'68), describing the e; Sumw^Hw! 

 says, "This fat fo. lss of drops of different sizes 

 : encloses the germ disc underneath and laterally ',' 

 The two phenomena descri ove are intimately connect- 

 i . fact bring about another known as the "clear- 

 t " . Ai the • 

 center and the oil .es frc i =ry, the Pipefish 

 egg becomes "clear", _i, _e % , the yolk, freed fro. sub- 

 stances becomes homogeneous anslucent. At this st 

 the egg of Siphosto. ia . Fig, i, PI, I, consists of a button- 



