igd 



TRIGLA KUMA. LESS. (RED GURNARD). 



Mature males and females were procured in False Bay in 

 December and artificial fertilization secured. The e^^ (Plate 

 1, fi^ 14) is larj^e. Of 30 which were measured the mean 

 diameter was 1*2 nun., the maximum i*:i, and the minimum 

 L'oy. The oil globule was uniformly '23 mm. in diameter and 

 was dark round the edges. The yolk soon becomes covered 

 by a network of yellow and black stellate cells. 



Hatching commenced on the i6th December at 2-30 p.m. 

 of eggs fertilized on the 13th at 9-30 a.m. The mean tempera- 

 ture was about 65'"' Fahr. 



The colouring of the larva (tig. 15; is very marked. 

 Yellow stellate cells occur on the head and dorsal regions of 

 body and on the dorsal and ventral aspect of the caudal 

 region, but are absent towards the posterior extremitv. The 

 dorsal and ventral lins are characteristically pigmented, there 

 being a series of stellate cells yellow and black just within the 

 margin proceeding from the anterior end in each, and running 

 parallel with, but not touching the border, and ceasing at a 

 point a little anterior to the ending of the dark pigment 

 matter which occurs on the superior and inferior border of the 

 body. The whole yolk is covered with a close network of 

 stellate cells, chiefly yellow, but a few black. 



This agrees very closely with Mcintosh's description of the 

 first day's larva oi Trighi guniardus, but the pectoral fin, though 

 appearing at this stage, is not so well developed, and is entirely 

 destitute of pigment. 



The oil globule is also similar, having a thick layer of pro- 

 toplasm surrounding it, but its position is difterent, being well 

 in advance of the posterior angle, the position in 7". gnnianliis. 



The notochord is multicokunnar. The dorsal fin commences 

 behind the head, and the pigment spots on the dorsal fin extend 

 here to body. On the second day after hatching the pectoral fin 

 is larger (about '^ the diameter of the eye and less than double 

 the otocyst.) The pigment cells have become more marked 

 and ramified. 



