Reviews—Hudleston and Wilson’s Jurassic Gasteropoda. 389 
In glancing over the pages of this work, we are glad to find that 
comparatively few changes in nomenclature are introduced. We 
have been prepared for the abolition of the Jurassic Phasianella— 
the species are now included under Bourguetia; and also for the 
abandonment of Hucyclus in favour of Amberleya. Chemnitzia (so 
far as Jurassic species are concerned) remains almost wholly a Liassic 
genus; one species is retained for a Corallian form, but the Great 
Oolite species are queried, and others are mostly assigned to 
Pseudomelania. Monodonta levigata becomes an Ataphrus. Hulima, 
Pterocera, Scalaria aud some other genera are no longer recognized 
as Jurassic. Where subgenera have, for biological purposes, been 
introduced, they are placed in a subordinate position; as with 
Ptygmatis and Nerinella, which are arranged under the genus 
Nerinea. EHuspira likewise is included under Natica. This plan 
is eminently satisfactory to the geologist. 
No attempt is made to indicate the zones in which species occur, 
and this would have been quite impossible, except in the cases of 
certain species obtained and described by the authors themselves, or 
enumerated by other authorities in recent years. Attention was not 
paid in old times to minute horizons, and even now-a-days the col- 
lector will find difficulty in obtaining in situ specimens that would 
satisfy the quite legitimate demands of the paleontologist. Sowerby 
described some of his species from Drift specimens; and we are glad 
to find that the authors, in assiguing a lovality to each species, have, 
so far as possible, given the first place to the type locality, or to 
the locality where a foreign species has first been noted in Britain. 
In future works of the kind it would be useful if the type locality 
were printed in italics. 
With regard to questions of dates and priority the authors remark, 
“ A person might spend the greater part of his life in hunting up 
such evidence as would be required to satisfy a court of law upon 
these points, which ought to be relegated to an international com- 
mittee whose decision should be final.” 
The census given by the authors curiously enough records exactly 
1000 species of Gasteropods from the Lias and Oolites, to which 15 
may be added for the Rhetic species. About 150 doubtful forms 
are rejected. 
The volume, printed as it is on thick paper, almost equals in bulk 
that of Morris’ Catalogue, of which the second edition was published 
nearly forty years ago. Hence it may be judged that a complete 
Catalogue of British Fossils will now occupy many volumes. It is 
most satisfactory to note that the present work is brought out 
uniform in size and binding with the Catalogue of British Fossil 
Vertebrata. 
We sincerely hope that others may now be stirred up to continue 
the good work which has been commenced, and so far carried out 
with such excellent results. Great labour, and a certain amount of 
drudgery, must always be incurred in preparing catalogues of this 
description. These however are not the most serious obstacles to 
the continuance of the work. Not every working paleontologist, 
