of the Fishery Board for Scotland. 197 
the inner stations, Ccelenterata were more numerous. ‘This difference 
does not seem be merely accidental; it is too general and persistent 
for that being the case, and is possibly due rather to a difference in the 
habits of the two kinds of organisms, but the reason, whatever it is, does 
not appear to be very obvious, An examination of the total numbers of 
the monthly records of Coelenterata for each station, as well as for all the 
six stations, shows one or two other points of difference between the 
distribution of these organisms and that of Sagitta. In the case of these 
Ceelenterates the lowest numbers of records for any of the six stations are 
those for March and April, whereas, in the case of Sagitta, the lowest 
numbers are, with one exception, those for June and July. It will be 
further observed that, if the numbers of the monthly records are separated 
to correspond with the inner and the outer stations, ten of the monthly 
numbers for the inner stations are greater, and some of them considerably 
greater, than the corresponding numbers for the outer stations, while one 
of the other two numbers is equal to, and the second only slightly less 
than, the numbers for the same months for the outer stations, which 
emphasises still further the difference in the distribution of these 
Ceelenterates between the inner and outer stations. This is more clearly 
shown by the Formula (2). 
Formula (2) shows the total number of records of Ctenophora and 
Hydromeduse for each of the twelve months, for (a) the inner stations, 
I., III., and IV.; (0) the outer stations, V., VIII., and IX. ; and (c) for 
all the six stations :— 
Names of the Months, - do 5 b g i bp 2, eee 
of gee eine 28 
. ((a) the Inner Stations, - - 1818 38 4101619 24 8 21 20 20 
Rows number of | (3) the Outer Stations, - 8.10 2 1 946 1p 12.1044, 810 
Month, for (c) all the Six Stations, - - 26 28 5 5 19 32 34 36 18 85 28 30 
That Coelenterates were more numerous at the inner than at the outer 
stations is still further shown by separating the yearly total numbers so 
as to correspond with the two groups of stations as in Formula (3). 
Formula (3) shows the total number of records of Ctenophora and 
Hydromedusz for each of the seven years, for (a) the inner stations, L., 
III., and IV.; (6) the outer stations, V., VIII., and IX.; and (c) for all 
the six stations :— 
Numbers of the Years, - - - - 1889. 1890. 1891. 1892, 1893. 1894, 1895, 
r (a) the Inner Stations 26 4S) 21 34 39 15 ii 
Pe ho! | (O}the Outer Stations, 18° 9°18 95 Bn lan!) we! ke 
Year, for ((c) all the Six Stations, 44 42 36 66 60 238° 25 
This formula shows that the number of yearly records forthe outer 
stations is considerably lower for every year except 1892, when the 
respective numbers more nearly approximate. The highest number for 
the inner stations is that for 1893, and for the outer stations the highest 
uumber is that for 1892, while the lowest numbers for both are in 1894 
and 1895. 
(5.) LarvaL and YounG Crustacea. 
The next group of organisms described in the tow-net records which 
are of numerical importance are the young of various species of Crustacea 
belonging to the Decapoda, Schizopoda, -and Cirripedia. Young and 
larval Crustacea are generally more or less frequent during the summer 
months, and sometimes they occur in great abundance, and because of 
