of the Fishery Board for Scotland. 
281 
ACRASPEDA (DlSCOPHORA). 
Cyanea capillata, Esch. 
First appearance. — 8th March, ephyrse. 
Last appearance. — 11th June. 
Most plentiful. — 4th May to 11th June, of very infrequent occurrence, 
on 16th May a pinkish hue seen, while on 11th June the specimen 
examined was larger than the former one and exhibited a yellowish 
coloration. 
The scarcity of Cyanea this year is remarkable. In 1884 they occurred 
in enormous numbers, so that even the trawls were impeded in their 
operations in June and July. 
Aurelia aurita, L. 
Mid-Water-Net. 
First appearance. — 7th March, ephyrae. 
Last appearance. — 3rd August, 3 specimens, 8 inches in diameter. 
Most plentiful. — 7th July to 3rd August. This form occurred very 
seldom. 
The scarcity of this species in the Bay during this year (1888) is also 
peculiar. They are occasionally so numerous that the surface of the sea 
for nearly a square mile is mostly covered with them. 
Ctenophora. 
Pleurobrachia pileus, Flem. 
Mid-Water-Net. 
First appearance. — 14th January, numerous, both large and small. 
Last appearance. — 18th December, in swarms, J to f inch. 
Most plentiful. — Numerous all throughout the year, except in January, 
February, and March. Especially numerous from beginning of 
July to end of October, when they appeared almost daily in 
myriads. During August and September small forms the rule, and 
in September only specimens from -J to J inch procured. Almost 
the only form obtained every month of the year. 
Surface- Tow- Net. 
First appearance. — 18th July, very few, large. 
Last appearance. — 14th December, a few | inch and downwards. 
Most plentiful. — 18th July to end of September (many ova found from 
beginning of September to middle of October). On 15th October 
embryos well developed. Only small forms as a rule procured. 
Generally a few each time ; much less frequent than in mid-water 
net. 
Bottom-Tow-Net. 
First appearance. — 14th July, very few, along with some larval forms. 
Last appearance. — 14th December, i inch and under. 
Most plentiful. — In July and August. (Ova got frequently in September, 
and larval forms from 14th July to end of October.) A few 
generally obtained each time, and these as a rule small, -J- to 
inch. Occurred oftener in this net than in surface-tow-net. 
