St. Andrews Marine Laboratory. 179 



foot, the tip of one tentacle being bifid, males of Aiitolytus 

 prolifer, advanced joung of Phyllodoce maculata ? about 4 

 millim., Eumida sanguinea of about sixteen bristled seg- 

 mentSj Pohjdora of twenty segments, Eteo7ie of twentj-five 

 segments, Eidalia 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 Spirorhis were also common. 

 Numerous Polydorce and Magelome 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 xlnnelids 

 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 

 SpiOy Polydorttj and Nerine. Terehelloi 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 Polynoidte occurred frequently in the 

 bottom-nets. It is rare, so far as present experience goes, to 

 find many young Polynoidaj 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 Eidalia^ Castalia, Pholoe, Capitella, and 

 Aricia were also procured. On the whole the wealth of 

 pelagic larval Annelids was noteworthy. 



The ChjEtognaths were less conspicuous close inshore and 

 they chiefly appeared in the midwater-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 Polynoidge reached §■ inch in length. 

 The use of the net beyond the Bay, as otF 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 



