398 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



with sea water continuously pumped up from the sea by 

 the ship's pump. The water was allowed to strain through 

 the net day and night continuously throughout the period, 

 except on one or two occasions. The contents of the net 

 were taken out in the morning and evening of each day, 

 and preserved in separate bottles. Mr. Robinson's collec- 

 tion was contained in twenty bottles, and represented ten 

 day and nine night gatherings. None of the gatherings 

 contained more than one c.c. of solid matter, whilst the 

 majority contained about half a c.c. only. Although the 

 gatherings were small in bulk, many of them were very 

 rich in number of species. As a rule there was a con- 

 siderable difference in the number of species of Copepoda 

 found in the gatherings taken during the day and those 

 taken during the night. The greatest number of species 

 found in anjr day gathering was thirty-three and the 

 lowest ten. On the other hand six out of the nine night 

 gatherings contained over thirty-three species; the 

 greatest number found in a night gathering was forty-two, 

 and the lowest twenty-one. The average number of 

 species for the ten days gatherings was slightly over nine- 

 teen and a half, and for the nine gatherings collected 

 during the night slightly over thirty-two and a half. 



Day 1 



3 



5 



7 



10 



12 



14 



15 



17 



19 



33 



17 



19 



31 



10 



17 



16 



12 



17 



24 



Night 2 



4 



6 



8 



9 



11 



13 



16 



18 





21 38 36 36 37 22 25 36 42 species. 



In addition to well-known oceanic Copepoda contained in 

 the gatherings, the following new species were observed : — 

 Candacia bradyi, Calanopia minor, Stenlieliairrasa, Stenhelia 

 erythrcea, Delavcdia inopinata, Delavalia minuta, Laophonte 

 inornata, Laophonte herdmani, Dactylopvs robinsonii, Liclio- 

 molgas minor. The total number of species of Copepoda 



