7 
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Mineralogy and Geology. 117 
logic Tan, peci 
~ the bibliography of the — Mr. Woodward has also published 
arterly Journal of mh Geological spose for February, 1867, an 
iustrated paper on some points in the structure of the Xiphosura, 
| ; i solen reference to their rdlsticbabin with the Eurypteride. 
ations on the Glacial Phenomena of Labrador and Maine, 
with a view mae the recent Invertebrate Fauna of Labrador ; by A. S, Pacx- 
Anp, Jr, M.D. Mem. Boston Soc. N. H., Vol. I. Published May, 1867. 
92 pages quarto, with two Fe reed this important memoir the author 
together the evidence and materials bearing upon the — of 
the marine deposits of the Posttertiary. or Drift period in Eastern North 
America. In the first part a description is given of the shvaenl and 
Recs which the author has observed there, and a catalogue of the 
| fossils collected. in the “ Leda oe of Labrador and New Brunswick. 
This is followed by an account of the Glacial and Drift action in New 
Nein a lista of the Leda Clay fossils fromthe various localities 
nh ex my 8 
The = ae recognizes four epoch h hysical conditions 
pochs or changes in physical con 
during the ae or rQuateraary Period. rie a period of eleva- 
er than an at present, while the climate vay become warmer, alin a 
northward migration of animals. Fourth, the Terrace epoch, duri which 
Was again elevated, causin g the drai drainage of extensive pote n 
and bays, and the formation - terraces, 
From th ossils of the Leda Clays at various localities 
inte that during this aa the marine animals of the coast were 
‘irginian fauna even extended north of mau i ite a limit,— 
in Maine, er had a marine fauna manlins that now oe 
in Labrador and Newfoundland. The evidence is entire’y a 
speci : Ls 
sensei rye ge warmer eek No cine 
