of the Fishery Board for Scotland. 
211 
Many of the larval annelids, e.g., Apkrodita, Pholoe, Nephthys, Phyllo- 
doce, Nereis, Arenicola, Aricia, Girratulus, Magelona, Capitella, Sabellids 
and Serpulids were also occasionally noticed, chiefly in July, August, and 
September. No group is more striking in the pelagic fauna, and none 
more valuable as fish-food. 
LARVAL ECHINODERMS. 
Plutei 
Bottom-Tow-Net. 
First appearance. — 23rd June. 
Last appearance. — 26th September, very few. 
Most plentiful. — 26th June to 17th August. They were of frequent 
occurrence in this net, and many or numerous specimens were 
obtained each time. 
Young star-fishes and Echinoids seen occasionally in bottom-tow-net 
from 26th July to 14th August. 
Surface- Tow -Net. 
First appearance. — 8th March, 1. 
Last appearance. — 10th December, one; arms short and apparent^ 
atrophied, skeleton still visible, no star-fish. 
Most plentiful. — 7th July to 26th September, generally a few each time. 
None from 26th September to 17th October, wmen a few procured, 
and none from latter date till 10th December. They occurred 
almost as frequently in this net as in the bottom-tow-net. 
The pelagic ova of Cucumaria were abundant in the tanks of the 
laboratory on April 15th, first in long strings and afterwards as separate 
reddish ova. 
CRASPEDOTJE. 
Order I. — Anthomedus^b. 
Sarsia tubulosa, Lesson. 
Mid- Water- Net. 
First appearance. — 4th May. 
Last appearance. — 24th July. 
Most plentiful. — In May and June of very frequent occurrence, in the 
former month appearing oftener than in June, but in the latter month 
more specimens obtained each time. 
Bottom and Surface-Tow-Nets. 
This species was obtained not unfrequently in the latter net, but very 
seldom in the former. 
The earliest appearance noted is that of Thompson, who found it in 
April (1840), in Belfast Bay. As a rule it occurs in May, June, and July, 
though young forms appear in March. 
A minute Medusa about ^ i nc h in vertical diameter, procured in the 
bottom-net in April and May, presented certain features of interest. The 
umbrella was bluntly rounded, and had four bright carmine specks in a 
somewhat triangular area above the margin. One of these nearly corre- 
sponded with the origin of a long granulated tentacle with a greatly en- 
larged base, the centre of which was also coloured pinkish. Moreover, 
from the same region sprouted an elongated bud of considerable size — 
