St. Andrews Marine Laboratory . 179 
foot, the tip of one tentacle being bifid, males of Autolylus 
prolifer , advanced young of Phyllodoce maculatal about 4 
millira., Eumida sanguinea of about sixteen bristled seg- 
ments, Polydora of twenty segments, Eteone of twenty-five 
segments, Eulalia of 6 millim., and young of Amphicora were 
other forms occasionally met with in the bottom-net. Though 
less abundant than the Copepods they formed a prominent 
feature in the pelagic life and made a notable addition to the 
food of the post-larval fishes, which as they get older seek the 
bottom. When the nets were worked close to the rocky 
margins the larval forms of Spirorbis were also common. 
Numerous Polydorce and Magelonce were still in the mature 
condition, so that the spawning-period extends over a con- 
siderable area. 
A decided increase in the number of pelagic larval Annelids 
took place in July. In every instance they were present in 
greater or less numbers in the bottom-nets, while as the month 
advanced they likewise became frequent in the surface-nets. 
The most abundant were the larval and postlarval forms of 
Spio y Polydora , and Nerine . Terebellce and Nicolece were also 
common, and a few of the older examples of these strength- 
ened the hyaline tube with particles of sand and mud. 
Minute postlarval Polynoidac occurred frequently in the 
bottom-nets. It is rare, so far as present experience goes, to 
find many young Polynoidge between tide-marks, where the 
adults are so common, and their abundance in the bottom- nets 
at a distance from the shore, in a truly pelagic condition, 
partly explains the reason. Besides the foregoing, minute 
postlarval forms of Eulalia , Castalia , Pholoe , Capitella ) and 
Aricia were also procured. On the whole the wealth of 
pelagic larval Annelids was noteworthy. 
The Chsetognaths were less conspicuous close inshore and 
they chiefly appeared in the mid water-net. Yet perhaps 
they were not far removed, since in former years masses were 
obtained at the end of the month in the midwater-net on the 
wolf-fish-ground towards the mouth of the Forth. 
The larval Annelids attained their maximum in August, 
the same forms occurring in the bottom-net as during July. 
Some of the post-larval Polynoidse reached £ inch in length. 
The use of the net beyond the Bay, as off the Bell Rock and 
south-east of the Island of May, showed that the same types 
abounded in these regions. Tomopteris was comparatively 
rare. 
The midwater-net captured Tomopteris somewhat more 
frequently along with an occasional Nereis , probably from 
pelagic seaweeds or debris, or perhaps from accidentally 
