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St. Andrews Marine Laboratory . 
the egg up to a stage when a hypural thickening occurred in 
the tail, which also presented fin-rays. At this stage * a a 
well-marked interrupted line of black pigment runs from the 
cardiac region to the anus, passes forward and upward behind 
it, and is then continued to the tail ; the marginal fin is con- 
tinuous from the anus to the tail ; a narrower [preanal] fin 
occurs in front of this, and it diminishes about the region of 
the gall-bladder, which is large and distinct. The dorsal fin 
again is similar and deepens a little in front of the caudal, 
which in outline is somewhat lobate. The fin-rays are present 
in the tail and are at this time better marked in the ventral 
(anal) than in the dorsal fin. They are also distinct in the 
pectorals. The snout now extends forward about half the 
diameter of the eye in front of it, and the mandible projects 
a little further, but is motionless, the animal aerating its gills 
in its progress through the water.” The large size of the 
otocysts and their continuation upward so as nearly to meet 
in the median dorsal line is another interesting feature. At 
this stage they are fully 12 millim. in length. It may further 
be noted that the ventral median line of black pigment ceases 
before reaching a line from the pectorals, an oblique bar on 
each side, forming a A with the apex directed forward, 
occurring at this region, only a short streak of pigment 
existing in the middle line in front. No trace of ventral fins 
is apparent. 
Lately (23rd May) the trawl-like bottom tow-net brought 
up a remarkably transparent fish about 35*5 millim. in length 
which gives us an intermediate stage between the foregoing 
and those which resemble the adult, though perhaps they only 
exceed this specimen by a few millimetres. The gunnel at 
this stage appears to live on the bottom, and probably hides 
amongst the sand like the young Anguilla , to which at first 
sight it has a close resemblance. 
The proportions of this translucent fish differ materially 
from the earlier form. Thus the eye is much less in propor- 
tion to the size of the head and the latter occupies much less 
bulk in proportion to the body. Nevertheless the eyes seemed 
to be large and prominent in life when viewed from above. 
r Ihe eye has a silvery lustre laterally, emerald and dark olive- 
green when viewed from above. Ventrally a black pigment- 
line begins on the hyoid and continues along the median line 
to the anus, just as in the earlier form, except that in front 
it now passes between the separated limbs of the A -shaped 
arrangement. A line of the same pigment-dots behind the 
* McIntosh and Prince, Trans. R. Soe. Edin. vol. xxxv. p. 869 (1890). 
