86 TRANSACTIONS LIVERPOOL BIOLOGICAL SOCIETY. 



friend and instructor Professor Herdman, F.E.S. In 

 much of the earHer collecting and sorting out of specimens 

 I enjoyed the co-operation of Mr. W. S. McMillan, F.L.S., 

 and I am indebted to our colleague Mr. A. 0. Walker, 

 F.L.S., 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.E.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 Eevision 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 

 given are taken from the rostrum or anterior portion of 

 the cephalothorax to the termination of the caudal seg- 

 ments, and do not include anterior or caudal setae. 



Map of L.M.B.C. District. 



