166 MARIE V. LEBOUR. 
(22) Thaumaleus longispinosus Brown. Once only in September, 1915, 
with eggs. 
(23) Caligus rapax M. Edw. Free in the tow nettings in September, 
December and March. On one occasion a female with eggs was 
present ; an unusual occurrence in the free state. 
Copepod naupli are common on and off for most of the year. 
At the end of January they were very abundant, also at the 
end of May and beginning of July. Calanus and Temora are the 
commonest forms identified. 
CIRRIPEDIA. 
** Nordisches Plankton,” Vol. 11. 
Balanus nauplii occur in the beginning of February, are very common 
in the middle of February and continue till the beginning of May, when 
they dwindle and disappear except for a straggler or two in June. In 
the end of July they reappear and stay till the beginning of October. 
Cypris stages begin in the end of April and continue until the end of May, 
are rarer in June and disappear in July. A few were seen in September 
and February. The fact that there are two seasons for these larve 
(which is borne out by other Plymouth records) probably means that the 
July forms are a different species, as at Port Erin only the spring larvee 
occur. 
CLADOCERA. 
*“Nordisches Plankton,”’ Vol. 1. 
(1) Evadne Nordmanni Lovén. Begins in the end of April and grows | 
very common in May, is common through the summer until the 
middle of September when it disappears. 
(2) Podon intermedius Lill]. Very similar in occurrence to Evadne, but 
is more frequent in August and September. 
AMPHIPODA. 
Sars, G. O., “ Crustacea of Norway, Amphipoda.” 
(1) Apherusa bispinosa (Bate). Occurred once in October and once in 
January. 
(2) A. Clevii Sars. A few specimens once in August and twice in 
June. 
(3) Caprella sp. Once at the end of August. 
Amphipoda indet. Rarely in April and September. 
