180 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 
friend and instructor Professor Herdman, F.R.S. In 
much of the earlier collecting and sorting out of specimens 
T enjoyed the co-operation of Mr. W. 8. McMillan, F.L.5., 
and I am indebted to our colleague Mr. A. O. Walker, 
F.L.8., of Colwyn Bay and to others for material and 
specimens collected. Lastly my sincere thanks are due to 
my friend Dr. G. S. Brady, F.R.S., of Sunderland, for 
frequent help in the examination and confirmation of 
specimens and whose distinguished work on British Cope- 
poda has formed the chief basis for my classification. 
Since completing the manuscript of this Revision the 
very beautiful and comprehensive work of Dr. Giesbrecht, 
of Naples, ‘‘ Pelagische Copepoden,” (Fauna und Flora 
des Golfes Von Neapel, 1892) has appeared, and in a few 
instances I have adapted the nomenclature in accordance 
with the results of his important researches. In the 
following enumeration of species all the measurements 
siven are taken from the rostrum or anterior portion of 
the cephalothorax to the termination of the caudal see- 
ments, and do not include anterior or caudal seta. 
Map of L.M.B.C. District. 
