weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1901. 77 
087 Seeley (Henry M.). The geology of Vermont. 
The Vermonter, vol. 5, pp. 53-67, Feb., 1901. (Not seen.) 
688 Sellards (E. EL). Permian plants. Taeniopteris of the Permian 
of Kansas. 
Kan. Univ. Quart., vol. 10, pp. 1-12, pis. 1-4, 1901. 
B89 — — Fossil plants in the Permian of Kansas. 
Kan. Acad. Sci., Trans., vol. 17, pp. 208-209, 1901. 
Describes occurrence of the plant remains at various localities. 
690 Shaaf (Albert), Price (J. A.) and. Spy Run and Poinsett lake 
bottoms. 
See Price (J. A.) and Shaaf (A.), 627. 
691 Abandoned meanders of Spy Run Creek [Indiana]. 
See Price (J. A.) and Shaaf (A.), 628. 
692 Shaler (N. S.). Broad valleys of the Cordilleras. 
Geol. Soc. Am., Bull., vol. 12, pp. 271-300, 1901. 
Discusses the origin and development of these valleys and the bear- 
ing of the evidence on the orographic features of the region. 
693 Shattuck (George Burbank). The Pleistocene problem of the 
North Atlantic Coastal plain. 
John Hopkins Univ., Circular No. 152, pp. 69-75, 1901. 
Am. Geol., vol. 28, pp. 87-107, 1901. 
Reviews the opinions of various writers on these problems and gives 
the author's conclusions. 
69-1 Apparent unconformities during periods of continuous 
sedimentation. 
Abstract: Science, new ser., vol. 13, pp. 99-100, 1901. 
695 Sheldon (J. M. Arms). Concretions from the Champlain clays 
of the Connecticut valley. 
45 pp., 1900. (Not seen.) Boston, Mass. 
Abstract: Am. Jour. Sci., 4th ser., vol. 11, p. 397 (J p.), 1901. 
696 Shimek (B.). Recent decline in the level of Lake Nicaragua. 
Am. Geol., vol. 28, pp. 396-398, 1901. 
Refers to a paper published in 1896 on the .same subject. 
697 The loess of Iowa City and vicinity [Iowa]. 
Iowa State Univ., Lab. Nat. Hist,, Bull., vol. 5, pp. 195-212, 1901. 
Am. Geol., vol. 28, pp. 344-358, 1901. 
Gives list of loess and recent fossils with notes on some of the 
species. 
698 Siebenthal (C. E.). On the use of the term Bedford limestone. 
Jour. Geol., vol. 9, pp. 234-235, 1901. 
Discusses the use of the name in Ohio and Indiana and considers the 
Bedford of Indiana has priority. 
