Aunt LVIVT 
V.—ON THE DISTRIBUTION OF PELAGIC INVERTEBRATE 
FAUNA OF THE FIRTH OF FORTH AND ITS VICINITY 
during the Seven Years from 1889 to 1895, both inclusive. By 
THomas Scort, F.L.S., Mem. Soc. Zool. de France. (Plates IV., 
V1, Vil.) 
CONTENTS. 
PAGE. 
Introductory, ; 5 : : ° . . 158 
Invertebrates Captur ed by the Tow- nets, : : , : : : we LBD 
(1.) The Mollusca, ; 4 , ; : ; ‘ 2 oeekad 
(2.) The Crustacea—(a a) Decapoda, ' : : ‘ : : Syl Loo 
(b) Schizopoda, ‘ - : : - me TOS 
(z.) Lhe Euphausiidee, : : . : - 160 
(7z.) The M ‘sera : : és - - a OhGO 
(c) Cumacea, . ; 5 : : : sv fahGZ 
(d) Isopoda, . 2 é : , . . REPLIES 
(e) Amphipoda, . : . . : - e170 
(f) Cladocera, . : : ; ; ; : abel yA 
(g) Copepoda, . : : 3 : : Sa east as SARA 
(3.) The Vermes—Sagitta, etc., . : : : fy 98 
(4.) The Ccelenterata—Ctenophora and Hydvomeduse, ; ; : sug 194 
(5.) Larval and Young Crustacea, . : : 4 Sime rs 
(6.) Pelagic Fish Ova, ; : , 5 : : . : . 203 
(7.) Explanation of the Charts, : < : : 2 207 
(8.) List of named species of Mollusca, Crustacea, ete. as : - (209 
INTRODUCTORY. 
The scientific investigations that have until recently been carried on in 
the Firth of Forth, and also outside the limits of the estuary, included 
among other things the examination of the various groups of pelagic in- 
vertebrates that form so important a part of the food of fishes. The 
examinatiop. was carried on chiefly in connection with the trawling opera- 
tions of the Garland, the steam cruiser set apart specially for scientific 
work. ‘The trawling experiments of the Garland were made over certain 
fixed portions of the estuary and neighbourhood which were denominated 
“stations.” The method adopted for the examination of the pelagic in- 
vertebrates was somewhat as follows :—During the time that each station 
was being trawled two tow-nets were kept constantly at work. One of 
these was towed at about half a fathom below the surface of the water, 
and was distinguished as the surface tow-net ; the other was fastened to 
the end of the beam of the trawl in such a way as just to clear the 
bottom, and was distinguished as the bottom tow-net. Sometimes other 
nets were used at intermediate depths, but not with the same regularity 
as the first two, The gatherings collected with these mid-water nets are 
therefore not specially referred to in this paper. The tow-nets at first in 
use were comparatively of small size, but subsequently a larger kind, 
somewhat similar to those that had been used on board the Challenger, 
were adopted, and are still used in connection with the Board’s scientific 
work. 
At first nine experimental stations were selected for the carrying out of 
special scientific work, but this number was afterwards increased toten. It 
has no$, however, been considered necessary for the purposes of this paper 
to tak¢ note of the published statistics for all these stations, and therefore 
