of the Fishery Board for Scotland. 185 
that the station with the highest number of records of Temora and 
Calanus is the same—viz., Station V. But the Table shows a slight 
diversity in the distribution of Temora throughout the different months 
of the year as compared with that of Calanus. Thus, the maxima of 
“monthly records are found in April and May, that for May being dis- 
tinctly higher than that for April, and the minima in January, February, 
March, and December ; while in regard to Calanus the maximum number 
is that for April, while the number for February is smaller than the maxi- 
mum by only five records. These points are more clearly indicated in 
the annexed formule. 
Formula (1) shows the total number of records of Zemora for each 
station for all the seven years :— 
(a) Inner Stations. (6) Outer Stations. 
Numbers of the Stations, - - - <a PERE, LV sae Wis EE Dl xX. 
Total number of Records for each Station, - 48 44 38 49 43 43 
Formula (2) shows the total number of records of Temora for each of 
the twelve months, (a) for the inner stations, (0) for the outer stations, 
and (c) for all the six stations :— 
Names of the Months,- — - cis sete Re 2 ee sie Be Bt Beeb Boe ee) 
? Lal 2, 8 i=} * o) 
See 2 eGsS = 2 6 22 
(az) the Inner Stations, - a tO. ee 287 arg AO ee 
Ren gtmber of | (6) the Outer Stations, - 0 4 8212613101916 10 6 2 
Month, for {(¢) all'‘the Six Stations,- - 110 12 48 54 28 17 27 202215 6 
In the distribution of Calanus the month that shows the smallest 
number of records is September, but in the case of- Temora the smallest 
number is that for January, and the proportional difference between the 
lowest and highest number of records is considerably greater for Temora, 
than for Calanus. 
Formula (3) shows the total number of records of Yemora for each of 
the seven years, (a) for the inner stations, I, III., and IV.; (0) for the 
outer stations, V., VILI., and IX. ; and (c) for all the six stations :— 
Numbers of the Years,- - - - 1889. 1890, 1891. 1892, 1893, 1894, 1895. 
((a) the Inner Stations, - 7 23 28 2 17 6 19 
ee ee of { (0) the Outer Stations, -13 36 81 2 17 5 9 
Year, for ((c) alll the Six Stations, -20 59 59 49 34 Il 28 
There seems to be a greater variation in the total numbers for the years 
in the distribution of Zemora than is the case with Calanus. The above 
formula shows that in the case of Zemora the highest total number of 
yearly records is fully five times greater than the lowest, but in Calanus 
the difference is less than three times ; and further, the yearly maxima for _— 
Temora occur in 1890 and 1891, and in 1891 and 1892 for Calanus. 
The total number of records for Temora for the six stations during the 
seven years is two hundred and sixty. 
‘ ACARTIA SP. 
The next Table shows the distribution of Acartza sp.,* in a manner 
similar to that of Calanus and Temora. 
* Careful examination is necessary in order to distinguish the species of Acartia, and 
for various reasons it was not always possible to carry out a minute and sufficiently careful 
examination of doubtful species on board ship; therefore the specimens of <Acartia 
observed were frequently recorded merely under their generic name. 
