( uj-apprrion S TO THE FAUNA OF THE FIRTH OF 
FORTH. 
Part VI. By Tomas Scort, F.L.S. (Plates V.-X.) 
In my paper—‘ Additions to the Fauna of the Firth of Forth,’ Part V.. 
_~ published in the Eleventh Annual Report of the Fishery Board for 
| Scotland (1893), it is stated that some of the species that are there 
_ described for the first time had been known for some years previously, 
- but had been allowed to stand over for want of sufficient information 
' - concerning them ; the same statement may be made now, as not a few 
of the species recorded in the sequel have been in my possession since 
1889, 1890, and 1891. There is nothing unusual in this, because an 
accurate knowledge of such small organisms, as many of the Copepoda 
are, and even of larger forms, can only be acquired by careful study 
extending over a lengthened period. Though much has now been done 
to throw light on the distribution of the Crustacean fauna of the Firth of 
Forth, my experience leads me to believe that much still remains to be . 
done ere our knowledge of this group—a group that forms an important 
part of fish-food—attains to anything approaching completeness. In the 
present paper, the additions to the Forth fauna include 43 species of 
Copepoda, 1 species of Ostracoda, 10 species of Amphipoda, 1 species 
of Annelida, and 1 species of MMollusca,—in other words, 56 species of 
invertebrates, of which, so far as I know, no previous records of their 
occurrence in the Forth have been published, now fall to be added to 
those recorded in preceding papers. I again find it necessary to leave 
' __ over several species of Copepoda for further study; the Amphipoda also 
' _ require further investigation ; and, thanks to the excellent work of Pro- 
| fessor G. O. Sars of Norway, the study of this difficult group will, ere long, 
become comparatively easy. Very much, also, still remains to be done 
among the Annelida of the Forth. One interesting group—the Nemertians 
—has scarcely yet been touched ; but the sea is a boundless storehouse 
whose treasures will never be exhausted. 
Seventeen species of the Copepoda now recorded are described and 
figured here for the first time ; preliminary descriptions of other 7 species 
new to science, and 1 new to Britain, have been published in the 
Annals and Magazine of Natural History for October 1893, and February 
1894, and 1 species, new to Britain, is recorded here. A few of the others 
are new to the East Coast.* In my paper ‘ Additions to the Forth Fauna,’ 
Part III. (Ninth Annual Report of the Fishery Board for Scotland, 
1891), the following statement occurs:—‘ I venture to predict that when 
‘the Firth of Forth becomes more thoroughly and systematically worked 
‘up, the number of Crustacea will be little, if at all, short of 500 species.’ 
In connection with this statement it may be of interest to mention that 
the number of species of Forth Crustacea, including those recorded i in the 
present paper, now amounts to over 480. 
My son, Mr Andrew Scott, has prepared all the drawings, and a large 
part of the necessary dissections required in the preparation of this 
paper. I may also say that, as in former years, the great interest taken 
in all our work, by Dr Fulton, has been a source of much encouragement. 
By his assistance, ever willingly given, I have been enabled to have the 
* Several rare and new species have also recently been added to the British fauna 
‘from the Moray Firth District (see the parts of the Annals and pela & : 
Natural History already referred to). Ne = 
