MADE AT THE PLYMOUTH LABORATORY. 275 
known as Tinside. The Laboratory fisherman, watching the hauling 
of a seine in Barnpool, saw eight shad caught with the mackerel, 
and these, together with some of the “ britt’’? which escaped from 
the net, he secured and brought to the Laboratory. I made a careful 
examination of these fish, and found that they belonged to the 
species Clupea alosa, having the slender numerous gill-rakers of that 
species. But in most of the specimens there was a row of dark 
spots on the side behind the shoulder-spot. Such spots are constant 
in the other species, C. jfinta, but, according to Day, have been 
recorded especially in the young of CO. alosa. My notes on the 
specimens are as follows: 
(1) Male: 144 inches long ; single row of nine rather large spots. 
Gill-rakers in first arch about 107, seventy on the horizontal portion. 
(2) Male: length 13% inches; gill-rakers on horizontal portion 
of first arch, seventy. Nine spots on side in single row. 
(3) Male: 134 inches; spots in single row, not very distinct ; 
counted six behind the shoulder-spot. 
(4) Female : 13} inches ; double row of spots on each side, counted 
twenty-one altogether ; spots of one row opposite spaces of the 
other. 
(5) Female: a double row of spots; nine in the upper row, two 
in lower. 
(6) Female: counted seven spots. 
(7) Female: five spots. 
(8) Female: no spots. 
In some cases the spots were symmetrical on the two sides, but 
in others they were scarcely to be distinguished on one side of the 
body, although well marked on the other. 
In the stomach of one specimen were three half-digested britt, 
doubtless from the shoals, some of which were taken by the seine 
and brought up with the shad. These were young sprats, and it 
was for the sake of feeding on these that both the shad and mackerel 
were in the Sound. 
The weight of the largest shad was 1 Ib. 14 oz.; of the smallest, 
95 oz. As far as I could judge the specimens had previously 
spawned : the breeding season is stated to be May and June, and it 
probably spawns in the Tamar. 
On September 8th four more specimens of the same species were 
brought up, taken in a seine on the west side of the Hamoaze. 
Auwis Rochei, Giinther.—A specimen of this species was obtained 
on August 13, having been taken with mackerel in a seine at 
Mount Batten. It was 16 inches long, sex female. The stomach 
was empty, the ovaries small. Under the microscope the eggs 
were found to be small, transparent, and yolkless ; probably the fish 
