1881.] Geology and Palecntology. 589 
rupedal animal yet found in a Paleozoic formation. The size of 
the specimens readily permits study of the curious scales formed 
like spines, which cover the belly in this species, the Euchirosau- 
rus and the Actinodon. When these animals turned upon their 
backs, they presented these scales, and a strong entosternum and 
episterna, all supported by strong ribs, and were unassailable. 
Ditier’s FELsires oF THE ReGion oF Boston.—A Geological 
Series of the Bulletin of the Museum of Comparative Zodlogy of 
Harvard University has been commenced, the second number of 
the volume being an essay on the felsites and the associated rocks 
north of Boston, by J. S. Diller. 
Grotocicat News.—The Journal of the Geological Society of 
London for January, 1881, contains several articles of unusual 
interest. First is a paper on the structure of the spiral arms in 
several families of the Brachiopoda, by Thos. Davidson, which is 
largely based on specimens worked out very beautifully by the 
ev. Norman Glass. Secondly, Descriptions of some specimens 
of pterodactyles of the genus Ornithochirrus from the Cambridge 
pper Greensand, by Professor H. G. Seeley. Third, The rela- 
tion of the Escharoid forms of Oélitic Polyzoa, by F. D. Longe, 
F.G.S. Fourth, New species of fossil fishes from the Black band 
iron stone near Edinburgh, by Dr. Traquair. In the number 
of the Proceedings of the American Philosophical Society for 
January—June, 1881, Professor J. J. Stevenson gives an account of 
the geology of the south-western counties of Virginia. Professor 
Cope publishes a systematic analysis of the families and genera 
of the Perissodactyla, and of the species of Zriplopide ; also a 
note on the structure of the hind foot of Zexodon, which he finds 
to refer the Zoxodontide near to or among the Proboscidea.- 
Miss Agnes Crane, of Brighton, England, author of various 
palzontological papers, is at present traveling in this country 
accompanied by her father. Professor Weatherby, of Cin- 
cinnati, has recently discovered, in Kentucky, some huge crinoids 
fclspathic granite of very coarse texture in the Laurentian forma- 
ion, : : 
Wagon loads. The sheets sometimes measure three or four feet in 
diameter, ; 
