8 
does the entry of the synonyniT in any given case mean that this 
synonymy is necessarily correct; it is simply quoting published syn- 
onymy. The same statement refers to the hosts cited. 
In looking up the literature of any given species, the reader should 
consult the cross reference (pp. 10 to 83) for the various genera 
under which the species has been published, and the synommis given 
in the general entries; by looking up these references in the general 
catalogue (pp. 84 to 383), all or practically all the references to the 
species are obtained. 
Suggestions in publishing new names. — In mdexing literatiue, 
one is impressed with the differences in arrangement of the material 
as published by different authors. S@me vuiters arrange the sys- 
tematic portions of their papers in such a mamier that it is an easy 
matter to obtain the important data. Other authors are less care- 
ful in this respect, and their material is arranged, m some cases, 
m a style which almost defies indexmg. 
As a very convenient style we would suggest the followuig dia- 
grams : 
Genus FASCIOLA Linnaeus, 1758. 
1758: Fasciola Linn., 1758a, 644, 648-649 (hepatica [give here either the tA^pe species 
or all of the species in the order given by the author]). [Give origin of 
name, if desired.] 
[Give here the s\monymy in same style as foregoing entiy.] 
Generic diagnosis. — Fasciolidx, Fasciolinas [It is always veiy useful to give the 
name of the family and subfamily]; [Here give the generic diagnosis.] 
Type species. — [If t^*pe has not been designated, state why the specks in question 
is now selected; as by first species rule, tautonomy. elimination, etc.] 
Species FASCIOLA HEPATICA Linnaeus, 1758. 
1758; Fasciola hepatica Linn., 1758a, 648-649 [add here type host and type locality]. 
[Add sATionymy here, in same style as foregoing entry.] 
Specific diagnosis. — Fasciola (p. — ) [give page where generic diagnosis is printed]: 
[Add here specific diagnosis.] 
Habitat. — [Give hosts and geogi'aphic distribution here.] 
Type specimen.— [Give museum number of type specimen.] 
A list of hosts, together with the parasites found in them, is an 
exceedingly useful adjunct to any paper dealing vdth parasites. 
Several authors have published such lists, but most authors fail to 
do so. If the plan of giving a compendium of hosts with every paper 
were more generally adopted, the papers would be very much more 
valuable. In indexing the hosts, especially in papers by certain 
authors, we have met vdth considerable difficulty, for it is often nec- 
essary to read carefully an entire article in order to avoid overlooldng 
the hosts. And even then it is, unfortunately, not exceptional 
that the reader can not be certain that he is indexing correctly. 
