(2 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
the hauls were of the same general type and the quantities 
were, 11 most cases, not very different, showing that one 
can get a good general idea of the fauna by such hauls, 
but that one cannot depend upon thei being minutely 
representative. They may show something like double, 
or, on the other hand, perhaps only one-half the quantity 
of organisms obtained in neighbouring hauls. 
For comparison with such gatherings, we may 
examine the similar series taken late in August from 
about the same locality. On August 21st there are 
practically no Diatoms present, only a very few 
individuals of Beddulphia mobilrensis. On the other 
hand, the Copepoda are much more abundant than they 
were in April; for example, take Ovthona semalas, of which 
only tens, amounting at most to a few hundreds, were 
present in April, while thousands (reaching eleven 
thousand in the weighted net) were in the August haul. 
Other interesting differences can be noticed on comparing 
the two lists (given in the Sea-Fisheries Report in full) 
in detail. 
The Copepoda have two maxima in 1907, the first in 
April and the second in September and October. The 
records start in January, with about 2,000 per haul, and 
keep below that level throughout February and most of 
March. During April they rapidly mount up with a 
series of successively higher records, with falls between 
such as April 2nd, 4,500; April 15th, 10,755; April 16th, 
11,600; till the climax is reached on April 27th, with 
29,825. During May the numbers are low, 1,045 to 6,505; 
in June they rise somewhat, 13,610 on the Ilth and 
15,450 on the 27th, falling again in July to numbers 
between 2,895 and 7,950. August shows a series of rises 
with falls between, the tops being 18,200 on the 10th, 
19,400 on the 14th, 14,700 on the 15th, 16,915 on the 
