74 BIBLIOGRAPHY. 



they have appeared in the same journal, in which case the 

 sequence is that in which they are printed." 



" The principal divisions of a work, mostly called volumes 

 or the equivalent if in a foreign language, are . . 

 numbered in large Roman capitals unaccompanied by vol., 

 tome, or Band, etc. ; separately paged parts similarly in small 

 Roman capitals, and parts not separately paged in Arabic 

 type. ... A series is indicated in parentheses preceding 

 the volume." 



"The number of pages, etc., of independent publications 

 is only given when it is so small that they may be considered 

 pamphlets." 



This, it may be added, is also given when the work treats 

 exclusively or nearly so of the Freshwater Rhizopoda. 



In confining this Bibliography to works made use of in the 

 preparation of the synonymies there is one disadvantage. 

 In few cases the whole and in some cases only a few out of 

 many of an author's works on the Freshwater Rhizopoda can 

 be given ; an inadequate idea of their number may therefore 

 be formed. This is particularly the case with the works of, 

 Greeff, Gruber, Maggi, and especially with those of Penard, 

 who is by far our greatest authority and most prolific writer 

 on the Freshwater Rhizopoda and Heliozoa. Should the 

 complete Bibliography ever be published this defect will be 

 remedied. 



JOHN HOPKINSON. 



