A REVISED LIST OF THE CRUSTACEA. OF THE FIRTH OF 

 FORTH. By Thomas Scott. 



In 1880-81 a list of the Invertebrate Fanna of the Firth of Forth was 

 published by Leslie and Herd m in in the Proceedings of the Royal 

 Physical Society of Edinburgh * in which were enumerated all the species 

 of Crustacea belonging to the Cirripedia, Amphipoda, Isopoda, Cumacea, 

 Schizopoda, and Decapoda, then known to occur in the estuary, but 

 leaving out the Copepoda and Ostracoda. 



In December 1884, Professor J. R. Henderson, in a paper read before 

 the same Society,! recorded several additions to Leslie and Herdman's 

 list, the Eutomostraca being again left out. Professor Henderson, how- 

 ever, expressed the hope that he would yet be able ' to form lists of these 

 ' more minute, though not the less interesting organisms ; ' but this hope 

 does not appear to have been realised. 



Seeing that the Entomostraca, and especially the Copepoda, form such 

 an important part of the food of certain fishes, it is rather surprising that 

 they should have been passed over from time to time by local naturalists. 



During the latter half of 1887 I was at various times engaged on 

 board the ' Garland,' assisting in collecting data required in connection 

 with the trawling experiments carried on under the direction of Professor 

 Ewart and Sir James Maitland, Bart. Excellent facilities were thus 

 afforded for gaining a knowledge of the variety and distribution of the 

 fauna of the Forth, and, acting on the instructions of Professor Ewart, 

 a record was made of all the organisms observed, including the Copepoda 

 and Ostracoda ; and as further additions to the lists of Crustacea already 

 published have also been made, I propose in the following paper to give a 

 record of the species of Crustacea now known to occur in the Forth 

 estuary — the parasitic Copepoda (fish-lice) excepted, which will be dealt 

 with in a separate paper later on. 



It will be understood that this record is not to be considered ex- 

 haustive; the Forth will have to be more thoroughly investigated before 

 the preparation of an exhaustive list can be attempted. Meantime, in 

 order to make this one as complete as possible, several species recorded 

 in the papers previously referred to are included, though they have not 

 yet been observed during the Board's investigations, and some addi- 

 tional stations for a few of the rarer forms have also been added on 

 the same authority. In preparing the list of Copepoda the classi- 

 fication and nomenclature adopted by Dr G. S. Brady in his mono- 

 graph | have been followed. For the Ostracoda, the British Entomostraca, 

 by Dr Baird, and various lists by David Robertson, F.L.S., and others, 

 have been consulted. The valuable monograph of the British Sessile-eyed 

 Crustacea, by Bate and Westwood, is still the standard work on the 

 British Amphipoda and Isopoda ; but as within recent years considerable 

 changes have been made in the nomenclature of these groups, it has 

 been thought advisable to follow that adopted in Part III. of the 

 Museum Nonnanianum,— a series of catalogues which are being published 

 for private distribution by the Rev. Canon Norman, D.C.L., F.L.S. 

 Advantage has also been taken of these catalogues to correct the nomen- 

 clature of the other groups. The British Stalk-eyed Crustacea, by 

 Professor Bell, the Popular History of British Crustacea, by "White, and 

 other works, have also been consulted. 1 wish also to acknowledge 



* Proc. Roy. Phys. Soc. Edin., vol. vi. pp. 215, 313 (1880-81). 

 + Proc. Roy. Phys. Soc. Edin., vol. viii. p. 307 (1883-85). 

 X British Copepoda, 1878-80. 



