Reviews— Quarterly Journal of Sciences 555 
tation of species in time and space, and illustrates his article with 
a plate of various species of Trigonie, Olive, Volute, Eburna, 
Argonauta, &c., which he cites as evidence of the migration of 
species in an Easterly and South-easterly direction that may pro- 
bably have been going on, with intervals of recurrent variations, 
since the commencement of the Secondary epoch. 
‘Lhe author believes, ‘that as the distance between the forma- 
tions becomes greater, so does, ceteris paribus, the difference in age 
increase. In other words, Geographical Space and Geological 
Time have the same sort of correlation as Electricity and Mag- 
netism; with apparently contemporaneous strata, a certain distance 
means a certain lapse of time, and as one varies so does the other.’ 
Dr. P. Martin Duncan and Mr. Harry Seeley are cited as Geologists 
holding these advanced views; and we may add Mr. E. C. H. Day, of 
Charmouth, had prepared an able paper upon this subject, which 
was cut short in its reading and too briefly noticed, before the 
British Association this year at Birmingham. 
We have seldom read a paper with the greater part of which we 
more cordially agree, and the subject of which we think is more 
deserving the attention alike of Geologists and Paleontologists. 
VI.—Muskte Tryter. CATALOGUE SYSTEMATIQUE DE LA COLLEC- 
TION PALEONTOLOGIQUE PAR T. C. WINKLER, HAARLEM, 1863—65. 
aes Teyler Museum at Haarlem is a well-known institution, and, 
besides other interesting objects of study, contains a remark- 
able and valuable collection of fossils. Among the latter may be 
found numerous examples of the genus Ichthyosaurus described by 
M. Bronn ; many species of Pterodactyle noticed and studied by 
M. Herman von Meyer; a fine head and other bones of the Mosa- 
saurus, and also of a turtle, both from the Cretaceous strata of Maes- 
tricht, as well as the great fossil salamander long ago described 
as the Homo diluvii testis by Scheuchzer ; besides there are some 
species of fossil fish described by Dr. Winkler in the “ Memoirs 
of the Scientific Society of Haarlem. ” 
The general collection of fossils, which consists of about 12,000 
specimens, was for some time unarranged, the geological position and 
locality of many of them being unknown. During the last few 
years, however, owing to the zeal and industry of Dr. T. C. Winkler, 
this valuable accumulation of fossil forms belonging to the dif- 
ferent geological periods, has been more systematically arranged, 
and the present catalogue is the result. It is published in three 
parts, forming an octavo work of 380 pages, well and carefully 
printed, and including the determination of the fossil species in the 
collection of the Paleozoic and Mesozoic periods. ‘The author has 
availed himself of the recent works on Paleontology, and in a great 
number of instances has added synonyms to the species indicated. 
The catalogues of the two periods are systematically arranged. 
After noticing the plant-remains, the fossil animals are catalogued 
zoologically, commencing with the lower forms of Invertebrata and 
