weeks] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1896. Ill 
Chemical analyses — Continued. 
Serpentine, Merrill, No. 500. 
Shonkinite, Weed and Pirsson, Nos. 724, 726. 
Silver ore, Enmions, No. 200. 
Silver ore, Porter, No. 550. 
Sinter, Emmons, No. 200. 
Slate, Kemp, No. 372. 
Soapstone, Kemp, No. 372. 
Socorro tripoli, Herrick, No. 307. 
Soda feldspar dike rock, Turner, No. 675. 
Soda granite porphyry, Turner, No. 676. 
Sperrylite, Walker, No. 712. 
Syenite, Cross, No. 149. 
Syenite, Kemp, No. 372. 
Syenite, Turner, No. 675. 
Syenite, Turner, No. 676. 
Syenite gneiss, Gordon, No. 250. 
Talcose slate, Nitze and Wilkens, No. 522. 
Tetrakedrite, plumbiferous, Hoffmann, No. 
327. 
Thaumasite, Penfield and Forbes, No. 540. 
Tinguaite, Weed and Pirsson, No. 725. 
Trachyte, Cross, No. 149. 
Trachyte, Kemp, No. 372. 
Trachyte, Turner, No. 675. 
Trachyte, Turner, No. 676. 
Tuff, Cross, No. 149. 
Tuff, Turner, No. 675. 
Tuff, Weed and Pirsson, No. 723. 
Uintaite, Eldridge, Nos. 190, 191. 
TJralite diabase, Lindgren, No. 348a. 
Volcanic ash, Barbour, No. 33. 
Wardite, Davison, No. 172. 
Water, Emmons, Nos. 200, 201. 
Water, Hoffmann, No. 327. 
Water, Shephard, Nos. 614, 615. 
Yogoite, Weed and Pirsson, No. 724. 
Colorado. 
Cebolla River deposits, Colorado, Lakes, No. 
428. 
Concretions of chalcedony and opal, Patton, 
No. 528. 
Cripple Creek, Colorado, Lakes, No. 425. 
Cripple Creek region, Lakes, No. 430. 
Eossil plants of the Denver Basin, Knowlton, 
No. 416. 
Further notes on Cripple Creek, Pearce, No. 
532. 
Geology of Cripple. Creek, Colo., Argall, No. 17. 
Geology of Cripple Creek, Colo., Cross, No. 150. 
Geology of Cripple Creek, Colo., Hills, No. 320. 
Geology of Cripple Creek, Colo., Hoover, No. 
341. 
Geology of Cripple Creek, Colo., Moore, No. 
514. 
Geology of Cripple Creek, Colo., Rickard, No. 
576. 
Geology of Sangre de Cristo range, Van 
Diest, No. 689. 
Geology of Silver Cliff and Bosita Hills, Cross, 
No. 149. 
Geology of the Denver Basin, Emmons, Cross, 
and Eldridge, No. 202. 
Gunnison gold belt, Colorado, Lakes, No. 424. 
Igneous rocks of the Telluride district, Colo., 
Cross, No. 151. 
Colorado — Continued. 
Laccolites in Colorado, Gilbert, No. 238. 
Mines of Custer County, Colo., Emmons, No. 
200. 
Mines of Bosita and Silver Cliff, Colo., Emmons, 
No. 201. 
Mode of occurrence of gold at Cripple Creek, 
Pearce, No. 531. 
Natural gas at Manitou, Colo., Strieby, No. 
635. 
New mineral from Cripple Creek, Knight, 
No. 412. 
Occurrence of a silver and gold mineral con- 
taining tellurium, Pearce, No. 534. 
On pearceite, Penfield, No. 538. 
On the nature of igneous intrusions, Bussell, 
No. 588. 
Ore deposits of Cripple Creek, Penrose, No. 
543. 
Ore shoots of Cripple Creek, Skewes, No. 621. 
Peculiar geologic formation, Patton, No. 529. 
Pikes Peak, Colorado, Lakes, No. 429. ■ 
Pine Creek district, Colorado, McCarn, No. 
461. 
San Juan region, Lakes, No. 432. 
San Miguel formation, Cross, No. 152. 
Stratigraphy of Platte series, Cragin, No. 
1436. 
Summit district gold regions, Lakes, No. 431. 
The Cripple Creek gold field, Bickard, No. 
577. 
The Smuggler-Union mines, Porter, Nos. 550, 
551. 
Twin Lakes region, Colorado, Guentherodt, 
No. 263. 
Underground waters of the Arkansas Valley, 
Gilbert, No. 237. 
TJraninite in Colorado, Pearce, No. 533. 
Vertebrate fossils, Marsh, No. 481. 
Victor, Colo., Lakes, No. 433. 
Connecticut. 
Lava beds at Meriden, Conn., Davis, No. 168. 
Limestone quarries of New York, Vermont, 
Massachusetts, and Connecticut, Bies, JSJo. 
578. 
New belodent reptile from the Connecticut 
Biver sandstone, Marsh, No. 476. 
Quartz vein at Mystic, Conn., Kemp, No. 373. 
Correlation. 
Orotaxis; a method of geologic correlation, 
Keyes, No. 395. 
Cretaceous. 
General. 
Analogies in the Lower Cretaceous of Europe 
and North America, Ward, No. 713. 
Age of tho Potomac formation, Gilbert, No. 
241. 
Potomac Biver section of the Eocene, Clark, 
No. 119. 
Nomenclature. 
Choctaw and Grayson terranes of the Arietna, 
Cragin, No. 141. 
Canada. 
Kamloops sheet, British Columbia, Dawson, 
No. 174. 
