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 A HISTORY OF SUFFOLK I. POLYCHAETA {con/.) Cirratulus cirratus. Mull, {conf.) eggs, which hy careful division and counting were estimated at about 600,000, so that it is not difficult to account for increased numbers — tentaculatus, Flem. Dr. W. Garstang thought that one of my preserved specimens collected about 1890 belonged to this species, but in 1 90 1 I carefully examined many living indiyiduals, and could not convince myself that there was more than one species Flabelligera affinis, Sars. About 1890 and earlier this was inconveniently abundant in the Orwell near Pinmill, many objects dredged up being almost covered with it. At the season of reproduction many were seen wriggling about near the surface, and when caught soon deposited eggs, which quickly hatched. In 1899 and 1900 it had become so scarce that I obt.iined few, and in 1 90 1 none. I never saw it elsewhere Notomastus ktericeus, Sars. Found in sandy mud near low-water level off Harwich, but is apparently not common Arenuola marina, Linn. Fine specimens are com- mon in the mud of the Orwell and Stour, but in some of the estuaries only small individuals occur Lanke cmchikga. Pall. Fairly common in the mud of the Orwell near low-water level, and probably in many other similar localities Denofhilus (?) tieniatiu, Harmer. According to Mr. Harmer this small worm occurs in pools on the shore near Harwich Amfhitrite johnstoni, Malmgren. Before 1901 this was not uncommon in the mud of the Or- well, but was then comparatively rare. One kept alive laid eggs, which by careful re- peated division and counting were found to be about two millions in number NUoka zostericola, Orst. About 1 890 great num- bers of this chaetapod crept out of the material dredged up in the Orwell near Pinmill, when it was kept in sea-water, but I have not found any since 1 897, when the character of the bottom became so changed I. POLYCHAETA {cm.) Polycirrus auraittiacus, Grube. I obtained a very fine specimen from the mud at Pinmill, the body of which was scarcely anything but a mass of eggs. In the course of a day when kept in sea-water, the head end free from eggs detached itself, and seemed still as much alive as ever Melinna crlstata, Sars. Well-grown specimens were common in the mud of the Deben opposite to Ramsholt, and I have found a few small ones near Pinmill and off Harwich Tercbeliides straemii, Sars. The occurrence of this in the mud of the Orwell at Pinmill is of much interest, since it had previously never been obtained in England, and only once in Scotland by Dalyell more than a hundred years ago. About the year 1890 I was able to collect quite a number, but have preserved only four mounted specimens, not then knowing that it was so rare. In 1 90 1 I spent much time in looking for it, but was able to find only one Sabelkria spinuksa, Leuck. Large masses of the sandy tubes built by these worms were com- mon outside Harwich Harbour, but since 1900 they hare been broken up and almost disappeared Sabetla pavonina, Sav. Common in the Orwell at the level of low tide, where dark-coloured specimens are more abundant than in most other localities II GEPHYREA Priafulus caudatus. In the mud of the Deben near Waldringfrith they were for many years so common near low-water level that I could collect a hundred in a few hours. Many had tails longer than their bodies, and now and then one was found with two tails. At one time large specimens were met with, but after a very cold winter they were com- paratively small. During the summer months, when living on the Deben, I never saw any indication of developed eggs VII. ARTHROPODA I. COPEPODA I had collected many of these, but unfortu- nately the material had been kept too long before it was carefully examined, and had deteriorated too much for the proper identifi- cation of the species. II. PANTOPODA (Sm Spiders) Pynogmum littorak, StrOm. I do not remember find- ing any in Suffolk, though I can scarcely believe it is absent. At the same time I do not know of any locality similar to that at Burnham in Essex where fine specimens are common II. PANTOPODA (fw/.) Nymphon rubrum, Hodge. By far the best locality I have ever met with for collecting this animal is in the Deben below Woodbridge. When sunny and the water clear, by stand- ing up in a boat they may be seen swim- ming in a curious sprawling manner, and are easily caught in a sieve fixed to the end of a long stick. The average size is about an inch. I have kept many alive, and it is curious to see how they fold themselves up and lie on the bottom, and when disturbed open themselves out like an umbrella and swim away.