Geology and Natural History. 435 



under Tuolumne Table Mountain, Cal., and notes on the early Cre- 

 taceous of California and Oregon ; R. Purnpelly, on the relation 

 of Secular rock-disintegration to certain transitional crystal- 

 line Schists ; A. Winslow, on the geotectonic and physiographic 

 geology of Western Arkansas ; W. Upham, on Glacial lakes in 

 Canada; C. R. Keyes, stratigraphy of the Carboniferous in Cen- 

 tral Iowa; E. Brainerd, on the Chazy in Charnplain valley; G. H. 

 Williams, on the petrography and structure of the Piedmont 

 Plateau in Maryland, with a supplement by C. R. Keyes ; J. Le 

 Conte, on the Tertiary and Post-tertiary changes of the Atlantic 

 and Pacific Coasts; J. E. Wolff, on the Lower Cambrian age of 

 the Stockbridge limestone ; H. D. Campbell and W. G. Brown, 

 composition of Mesozoic igneous Rocks of Virginia; W. H. 

 Weed, on the Cinnabar deposits and Bozeman coal fields of Mon- 

 tana; H. W. Turner, on the Geology of Mount Diablo, Cal., with 

 a supplement on the chemistry of the rocks by W. H. Melville. 



3. Cambrian fossils in the Stockbridge limestone of Vermont. 

 — J. E. Wolff, in his paper in vol. ii of the Bulletin of the 

 Geological Society of America (page 331), mentions the very 

 important discovery of Lower Cambrian fossils in the great 

 central limestone belt of Vermont, at several localities in the 

 vicinity of Rutland. The fossils are a species of Kutorgina, and 

 a Salterella, much like S. currata of the Olenellus Cambrian of 

 North Attleboro, Mass. The limestone belt has, on its east side, 

 with conformable bedding, the Green Mountain quartzyte, which 

 Walcott proved, by the discovery of fossils, to be Lower Cam- 

 brian. West of the Limestone belt and dipping beneath it there 

 is a second quartzite, that of Pine Hill, which also is referred to 

 the Olenellus Cambrian. West of this there is a Center Rutland 

 belt of limestone which was proved by fossils to be of Lower 

 Silurian age, like that of the West Rutland limestone. Dr. 

 Foerste was associated with Mr. Wolff in the discoveries. 



4. Geological Survey of Kentucky. — This survey under John 

 R. Procter, Director, has recently issued a report on the Geology 

 of Clinton County, by R. H. Loughridge, M.D., and another on 

 Whitley County and a part of Pulaski, by A. R. Crandall, assist- 

 ant. Each is illustrated by a colored geological map, and the 

 latter also by several plates. 



5. Geological Survey of Missouri. — Bulletin No. 4 of this Sur- 

 vey contains descriptions of a large number of new species of 

 Crinoids, from the Subcarboniferous beds of Missouri, by S. A. 

 Miller, with figures illustrating them on four plates. A Bien- 

 nial report by Mr. Winslow, the State Geologist, has recently 

 been issued, which gives a sketch of former geological surveys in 

 Missouri, and an account of the work now going forward. 



6. Geological Survey of Arkansas. — J. C. Brannee, State Geol- 

 ogist. The annual report for I 889, vol. ii, covering 283 pages, is 

 devoted to an excellent detailed account of the geological struc- 

 ture and the resources of Crowley's Ridge, by R. Ellsworth 

 Call. Crowley's Ridge, the only marked prominence in the 



