PREFACE. 
The first duty of the Editor is to thank the Recorders who have 
worked at this thirty-first volume of the Zoological Record. 
This he does most heartily ; for the labour of making a complete 
index to the literature of any division of zoology increases every 
year with the constant augmentation of literature. 
Professor Hickson has found that he would be so fully occupied 
that he could not undertake a record of Ccdenterata for this volume. 
Fortunately a successor to him has appeared in the person of 
Mr. R. T. Gunther, of Magdalen College, Oxford, who will record 
the literature of 1894, in combination with that of 1895, in the 
volume for the latter year. 
Mr. Pocock having not even commenced his records at the time 
they should have been in the hands of the printer, it was found 
necessary at the last moment either to publish the volume with- 
out them, or to delay it for a considerable and uncertain period. 
In conformity with the decision announced in the preface 
to the twenty-eighth volume, the latter alternative has been 
adopted with regret. 
The list of periodicals has been revised, and increased by the 
insertion of the names of some sixty or seventy publications. 
Indications of those now taken in at the Science and Education 
Library of the South Kensington Museum have been added* It , 
may be noticed that nearly all the periodicals in the list are to be 
found at South Kensington, either in the Natural History Museum 
or in the Science and Education Library. 
