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197 Y 



SPECIES IV. 



(PELAGIC.) 



On one occasion an egg 1*44 mm. in diameter, and with a 

 single oil globule "29 mm. in diameter, was found in tow 

 nettings in F^alse Bay in December. The larva (Plate III, iig. 

 26) hatched out on the following day, and proved to be well 

 marked as regards colouring. There was a dense network of 

 yellow pigment along the borders of dorsal and ventral fin, and 

 :i few yellow pigment cells on the oil globule which occupied 

 an anterior position. Isolated stellate black spots occurred on 

 the oil globule above the head and behind it for a short 

 distance ; a series of isolated stellate black spots occurred on 

 the ventral side of the body from otocyst to rectum, and 

 about half a dozen on the posterior inferior margin of the 

 yolk sac. The yolk had n vesicu ated appearance. The anus 

 was considerably behind the yolk in the posterior half of the 

 total length of the body. 



About the same time another egg, i'48 mm. in diameter, 

 with an oil globule -29 mm. in diameter was found, and pro- 

 duced a similar embryo. 



\ 



y 



SPECIES V. v^ 

 (PELAGIC.) 



Several eggs were procured in tow-nettings on the i6th 

 December, 1902, from False Bay, having a diameter of 

 •98 mm. and possessing no oil globule. Yolk and embryo 

 were covered with many vellow pigment cells. They hatched 

 out into larvae (PI. Ill, fig. 27) which were readily distinguished 

 in the water by their short form and large yolk sac, and by 

 characteristic movement, viz., a rapid vibration of the extremity 

 of the tail with verv little apparent movement of the anterior parts. 

 They have also macroscopically a slightly cloudy appearance. 

 The larva was i-6 mm. in length, and the yolk sac very nearly 

 half this. The anus was situated close to the yolk sac, and is 

 thus near the vertical from the centre of the body. 



The body, head, yolk sac and vertical fins are covered by 

 yellow finely branching pigment cells, the bodies of which are 

 small and bead like. An exception to this is the posterior 

 third of the caudal region, which is destitute of any pigment. 

 In some larvae a few of the ends of the branching cells were 

 black; and in others a few black spots appeared on the body. 



