116 Chronicles of Science. [Jan., 



Both these Memoirs are well illustrated with sections and dia- 

 grams. The authors give due credit to other observers who have 

 previously described these districts. They will be found of the 

 greatest service to all who may need to consult them, either for 

 professional purposes or as amateur geologists. 



In November, 1867, the Kev. Thomas Wiltshire, M.A., F.G.S., 

 read a highly interesting paper before the Geologists' Association, 

 " On the Chief Groups of the Cephalopoda" This has just been 

 published, and will be found very useful by the student. The 

 author touches upon the structure and habits of these animals, and 

 gives schedules of the recent and fossil Cephalopods, wherein are 

 analyses of the families and genera ; he also gives an appendix on 

 the range of the genera in geological time. 



Mr. E. D. Cope has published the first part of an elaborate 

 1 Synopsis of the extinct Batrachia and Beptilia of North America.' 

 He has thought it best to describe only those species and types 

 which are new, and those portions of imperfectly known forms which 

 will throw additional light on their relations and affinities. 



In the course of his investigations, prosecuted during the past 

 six years, with reference to the structure and relations of the extinct 

 Reptilia, the following general conclusions have been arrived at, 

 besides many of lesser significance : — 



1 . That the Dinosauria present a graduated series of approxi- 

 mations to the birds, and possess some peculiarities in common with 

 that class, standing between it and the Crocodilia. 



2. That serpents exist in the Eocene formations of this country. 



3. That the Chelydra type was greatly developed during the 

 American Cretaceous period; and that all the supposed marine- 

 turtles described from it are really of the first-named group. 



4. That the Beptilia of the American Triassic period are of the 

 Belodon type. 



5. The discovery of the characters of the order Pythonomorjoha. 



6. The discovery of the characters of the order Streptosauria. 



7. The development of the characters of numerous members of 

 the Batrachian sub -order Microsauria in the United States. 



The Memoir is illustrated with eleven plates and numerous 

 woodcuts. Mr. Cope's work is peculiarly interesting, as bearing 

 upon the researches of Professor Huxley on the affinities of the 

 Dinosauria with the class Aves independently carried on in this 

 country. 



' The Geology and Mineral Yeins of the Country around Shelve, 

 Shropshire, with a Notice of the Breidden Hills,' by G. H. Morton, 

 F.G.S., F.B.G.S.I., President of the Liverpool Geological Society 

 (extracted from the Proceedings of the Society), Liverpool, 8vo, 

 pp41. 



This work treats of both the Geology and the Archaeology of 



