786 Proceedings of Royal Society of Edinburgh. [sess. 
Pluteus. 
In 1901, it was first noticed in the tow-net on 30th April. A 
few were taken early in May, and towards the end of the month it 
became common. It was very scarce during June and up to the 
middle of July. It was abundant from 18th July to the end of 
the month. A few were seen on 18th August, and in the Kyles 
of Bute on 21st September. 
In 1902, Pluteus was scarce. It was first taken on 29th April, 
hut not seen during May. Only once taken in June, on the 18th, 
when it was very scarce. A few about the middle of July. Yery 
scarce early in August, and absent during September. One was 
taken on 3rd October, and another on 26th November. No 
attempt was made to identify the species of the larval Echinoderms. 
POLYCHAETA. 
Tomopteris onisciformis, Eschscholtz. 
In 1901, Tomopteris was first seen on 24th September, and again 
on 30th September. Specimens were taken on 1st, 2nd, 4th, and 
19th October. Most were about 5 mm. in length, and none 
exceeded 10 mm. 
In 1902, specimens were taken on the following dates : — 
Jan. 24, 
July 15, 
Aug. 25, 
Sept. 30, 
Oct. 17, 
Nov. 6, 
Nov. 15, 
Dec. 23, 
One, 20 mm. in length. 
One, 5 mm. „ 
Two, 3 mm. ,, 
One, 
One, 5 mm. ,, 
Five, 5-10 mm. ,, 
Four, 3-12 mm. ,, 
One, 12 mm. ,, 
The rare occurrence of Tomopteris indicates that it is a “ visitor ” 
which comes up to Cumbrae from the south. 
I found at Valencia that large adult individuals were rather 
scarce during the early part of the year. Early stages became 
common about May. These increased rapidly in size during the 
summer months, and produced another generation in the autumn. 
