32 
black pigment. The two kinds of pigment appeared to give rise to 
three bands in the caudal region. One of the embryos was found 
hatched on the morning of the 3rd April, and other two next day. 
They were very lively, light green in general appearance, with 
prominent eyes. They measured about 7'5 mm. 
A closer inspection showed that the black pigment was distri- 
buted in two longitudinal lateral row's on each side of the dorsal 
and ventral fins ; and that the yellow pigment was dotted all over 
the animal. There were concentrations of both kinds on the head, 
and also in positions which seemed to mark 2 dorsal and 2 ventral 
(anal) fins. 
I beg to thank Mr. E. W. L. Holt for kindly replying to my 
enquiry that the eggs are probably those of At/onus cataphractus (the 
armed bull-head). They certainly agree pretty closely with the 
measurements and descriptions recorded for this species, but I did 
not observe the irregularities of the capsule which are said to be 
characteristic. 
PLANKTON. 
The other pelagic life observed in the gatherings made at the 
trawling excursions, included the forms previously pointed out — 
see also Dr. Brady’s paper (page 64). During June Medusoids 
were very common especially Sarsin tubulosa and Phialidium 
variabile. We got also Pleurobracliia, Lesueuria and Beroe in much 
smaller numbers. We always got these forms, but the Sarsia this 
year appeared to be very much more numerous than usual. 
Still more remarkable, however, were the immense catches of 
practically nothing else but Cladocera, and these mainly, if not 
purely, Evadne nordmanni and Pleopis polyphemoides. This was the 
case at Blyth Bay, 4th July, and at Cambois Bay, lltli July, bvit 
in other places the predominance of Copepoda was usually main- 
tained. During the season the usual succession of larval forms 
appeared, and jelly-fishes were fairly common. 
