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Post-Larval Teleosteans collected near Plymouth 
during the summer of 1914. 
By 
E. J. Allen, D.Sc., F.R.S., 
Director of the Plymouth Laboratory. 
With 8 Figures in the Text. 
In Volume X, No. 2, of this Journal issued in June, 1914, Mr. R. S. 
Clark published an account of the post-larval fishes collected during 
the years 1906 to 1913 with the Petersen Young-fish Trawl in the neigh- 
bourhood of Plymouth. Similar collections were continued regularly 
under Mr. Clark’s supervision, with the assistance of Mr. E. Ford and 
Mr. F. M. Gossen, from April to July, 1914, and two or three hauls were 
made in August and September of that year. At the beginning of August 
Mr. Clark joined Sir Ernest Shackleton’s expedition to the Antarctic and 
left Plymouth in the “ Endurance.” The young fishes had for the most 
part been picked out from the general material collected by the young- 
fish trawl by Messrs. Ford and Gossen, and it is this collection of voung 
fishes which forms the subject of the present report. 
In drawing up the report I have followed closely the arrangement 
adopted by Mr. Clark for the earlier material, and it should be regarded 
throughout as being supplementary to his paper (1914). For most 
of the important fishes I have given a monthly summary of the number 
of specimens captured during the whole period 1906 to 1914. which 
includes both the figures given by Clark and those now added. The 
average number of specimens taken per haul of the trawl] has also been 
given for each month. For many reasons, however, these averages cannot 
claim any great degree of accuracy, but they are, I think, useful as giving 
a general idea of the relative frequency in the different months. The 
following sources of error must be borne in mind when drawing conclu- 
sions from the averages. The duration of the hauls has been in most 
cases twenty minutes, but there are a few instances where the time was 
fifteen minutes and a few where it was thirty minutes. The error intro- 
duced by regarding all the hauls as of equal duration will be so small 
that it will hardly show in the average figures given. 
