\ 
12 Transactions of the Royal Society of South Africa. 
•72 to '69 mm., and they contain from two to seven oil-globules, which are 
of a yellowish colour, are scattered irregularly about the yolk, and vary from 
■08 to "04 mm. in diameter. A pinkish tinge pervades the embryo from the 
early stages of development, and the yolk is homogeneous. 
In the larva there is a marked regularity in the arrangement of the large 
pigment-cells. These are of a pink colour suffusing the head region, and 
about midway between the eye and anus is a large mass on the dorsal side 
of the body ; posterior to this, and about equidistant from each other, are 
three masses in pairs on the dorsal and ventral sides of the body, branching 
on to the fins, the first pair being situated over the rectum. Small black 
stellate spots and dots are scattered over the head and body to within a 
short distance of the extremity of the tail. The oil-globules are arranged 
irregularly in the ventral portion of the yolk and are yellow in colour. The 
notochord is multicolumnar, and the rectum anterior. 
The larvae were reared to the ninth day, during which time the following 
changes were noted : On the second day the pink-coloured cells had spread 
well on to the fins, where also black branching cells appeared, and the 
pectoral fins had commenced to develop. On the fourth day the yolk was 
nearly consumed, the pectoral fins had increased in size and the development 
of the mouth begun. After this, and up to the ninth day, a gradual change 
in the coloration of the pigment was observed, the pink changing to a brown, 
except in the case of the cells over the rectum, which deepened to a red. 
These eggs most nearly resemble those of Arnoglossus capensis (' Mar. 
Inv.,' vol. iii, p. 133), but the latter have only one oil-globule, and the tuber- 
culate appearance of the fins of the larva was not observed in this case. It 
may prove that these differences are not essential, but meanwhile it may be 
well to keep the two kinds separate. 
Species XXV. 
These minute eggs were obtained in January, and were not observed in 
the jar containing the tow-netting until after formalin had been added to 
the water. Their diameters vary between '56 and -49 mm., and there is a 
large perivitelline space. In the preservative the yolk is dark, black with a 
green margin. 
Species XXVI (Trigla sp. ?). (PL I, figs. 31, 32 ; PI. II, figs. 33, 34.) 
On July 6, 1917, many hundreds of eggs were procured in the tow- 
nets, about 90 per cent, of which belonged to this species. A few were again 
got on August 1. 
The egg varies in diameter from 1'2 to 1-17 mm., and contains a single 
oil-globule, which, on account of its comparative smallness ('12 to -07 mm.) 
and its salmon-pink colour, in the early stages, gives to the egg a dis- 
