Rcz'iciK.' of Recent Ceulogical Literature. 47 
statement, p.x., intruduetion to his catalogue, the collection contained 
then (i8g9) i,2J,^ specimens. Quoting his remarks: 'These figures 
speak for themselves. However numerous may be the specimens of 
Blastoidca in other museums, there can scarcely be any collection so 
representative of the class as a whole or as rich in specimens of the 
highest scientific importance as is that of the British Museum.' This 
is a istrong expression, especially since Mr. Bather has not seen all col- 
lections. Considering that America contains the bulk of the material, 
although admitting that the British Museum has the very valuable col- 
lections of Gilbertson, I. Rofe and L. G. de Koninck of unique speci- 
mens, I venture to say that our American materal is on the whole better 
preserved than that found in Europe, and being confident that the 
American collectors did not send their best specimens across the water, 
it is not very doubtful to say that, for the study of this particular class 
of fossils, the best material is found on this side of the water. Com- 
paring the figures of the British collection with my own, shows at a 
glance on which side the most material is to be found. Aside from this, 
my collection, which was brought together in fifty years, and comprises 
about ten thousand specimens, contains a number of real scientific spec- 
imens (pathologic and abnormal developments and specimens illustrat- 
ing morphology) hardly to be found in any other collection. A student 
could learn more on a dozen or two picked specimens from our material 
than from the whole collection of Gilbertson, Rofe or de Koninck. Be- 
sides' specimens illustrating the morphology, my collection contains 
considerably over one hundred pathologic and abnormal specimens." 
The memoir is admirably illustrated by lithographic plates. 
C. R. K. 
Memoir 6, New York State Museum is entitled The Naples fauna in 
lVestcr)i Nezi< York, pari 2 (part i having been published in the 
T6th ann. rept. N. Y. State Geologist, 1898), quarto, 207 p.. 20 pho- 
togravure plates, by John M. Clarke. 
This work continues and completes the treatment of this remarkable 
fauna which at the commencement of the studies was known by only 
a few species, while as now tabulated its members rise to the respectable 
number of 170 species. The lamellibranchs (upward of 70 species) gas- 
tropods and pteropods are here treated in detail and some notes are 
given on other species of the fauna. 
In the introductory chapter on Ttxc sci af Portage time is brought 
together a general summary of the results in their bearing on the bion- 
omy of the fauna and their interpretation of the marine conditions of 
the period. It is shown that the fauna, invading from the west, en- 
tered the area of western New York or Genesee Province in proces- 
sional succession, the advance penetrating in its integrity not farther 
than Cayuga lake, the rear battalion differing from its antecedent in 
many palpable particulars, entering to. but hardly beyond the meridian 
of the Genesee river. The presence, of these two sub-faunas is shown 
to be in part vertically sequential and partly contemporaneous. With 
the evidence of thc«e differences in faunal composition the entire or 
