of the Fishery Board for Scotland. 201 
—viz., twice for Station I. in July, and once for Stations V. and VIII. 
in September. They are described as abundant in four of the records for 
1891—-viz., once for Station VIII. in May, once for Stations IIT. and IX. 
in July, and once for Station I. in August. They are recorded as abun- 
dant three times in 1892—once for each of the three Stations V., VIIL., 
and IX. in September. Young Crustacea are described as abundant five 
times in 1893, once for Station I. and twice for Station III. in July, 
and also twice for Station V. in June. In 1894 there are over twenty 
records of young Crustacea, but in none are they described as abundant 
unless the three April records of young Balani (for Stations I., II1., and 
IV.) be counted. On the contrary, in 1895 young Crustacea are described 
as abundant no fewer than twelve times, once at each of the three outer 
stations (V., VIII., and. IX.) in April, once at Stations III. and V. in 
August, once at Stations I., III., and VIII. in September, and once at 
Stations I., IIL, and IV. in October—thus indicating that, notwithstand- 
ing the difference in the number of records when compared with those 
for 1891, 1892, or 1893, young Crustacea were locally more plentiful in 
the estuary and its vicinity in 1895 than during the other three years 
referred to. 
The number of separate records of young Schizopoda is thirty-two for 
the seven years, and their distribution is indicated by the following three 
formule :— 
Formula (1) shows the total number of records of Schizopoda for each 
of the stations :— 
Number of the Stations, = : Peers Ves We AUIS IDK 
Total number of Records for Sah Sta om = = 12 4 0 3 7 6 
Formula (2) shows the total number of records of Schizopoda for each 
of the twelve months :— 
Names of the Months, as 5 5 = be ep =I re S 3 
; Seed 54a S2480 
Total number of Records for each Month, eNO Ray Gye voter as Aa lela i 
Formula (3) shows the total number of records of Schizopoda for each 
of the seven years :— 
Numbers of the Years, - - 1889. 1890. 1891. 1892. 1893. 1894. 1895. 
Total number of Records for uals Year Span) 16 6 1 4 0 0 
The separate records of young Balani number lifty-eight. These larval 
Crustaceans are described as abundant in 1891 at Station I. in April, and 
in 1892 at Station III. in April. In 1893 they appear to have been 
plentiful at the inner stations, and are described as abundant in a surface 
tow-net gathering at Station I. in April, in the bottom tow-net at 
Station III. in June, and in a surface tow-net gathering at Station IV. in 
April. In 1894 young Balan are described as abundant in the bottom 
tow-net gatherings collected at Stations I., III., and LV. in April. In all 
the other records of these immature Crustaceans they are either described 
as common or few. ‘Theirdistribution is indicated by the following three 
formule :—— 
Formula (1) shows the total number of records of young Lalani for 
each of the six stations :— 
Numbers of the Stations, - - | iegdives Std OA Vie VEU? EX: 
Total number of Records for seh Sieieeny 2 “ U2 We U7 3 8 6 
This formula shows that young Balani were, as might be expected, more 
numerous at the three inner stations, and that the highest number of 
