This major reference is a republication in one volume of the 10 part CIH Keys to the Nematode Parasites of Vetebrates, first published between 1974 and 1983. For many years the 'Keys have provided a working tool to those within the field and laboratory needing to know "What is this worm?" They have also helped to establish a classificaton, using associations of characters, that gives real insight into nematode relationships across the group and their lines of evolution. The separate parts are now presented as one volume, refreshed and reformatted with the additional covenience of reordering into superfamily. The Supplementary Volume includes revissed and redescribed taxa and draws attention to new taxa, to the generic level. As an indispensable guide the 'Keys' shall continue to be an essential resource to those working within medical, veterinary and biological departments worldwide for many more years to come. Book jacket.