PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1894. 137 
Paleontology— Continued. 
Genera and species described — Continued. 
Vitulina Hall, Hall and Clarke, 236. 
Vola humphreyso, Whitfield, 628. 
Volutalithes lyroidea n. sp., Aldrich, 5. 
Whitellaohioensis n. sp. or var., Ulrich, 570. 
"Wliitfieldella Hall, Hall and Clarke, 236. 
Williamsonia texana n. sp., Fontaine, 200. 
Wilsonia (Quenstedt) Kayser, Hall and Clarke, 
236. 
Yoldia limatula, Whitfield, 628. 
Zearinus mooresi, Whitfield, 629. 
Zellani Moore, Hall and Clarke, 236. 
Zemites tenuinervis Font., Fontaine, 200. 
Zephrentis cliffordana, Whitfield, 629. 
Zizyphus elegans n. sp., Hollick, 280. 
Zygospira Hall, Hall and Clarke, 236. 
putilla n. sp., Hall and Clarke, 235. 
(Catazyga) Hall, Hall and Clarke, 236. 
(Orthononuea) Hall, Hall and Clarke, 236. 
Pennsylvania. 
Cambrian rocks of Pennsylvania, Walcott, 
600. 
Continuity of the Glacial period, Wright, 673. 
Cone-in-cone, Gresley, 227. 
Devonian of eastern Pennsylvania and New 
York, Prosser, 465. 
Devonian plants from New York and Penn- 
sylvania, Penhallow, 451. 
Drainage features of Tipper Ohio basin, 
Chamberlin and Leverett, 63. 
Extra-inorainic drift, Williams, E. H., 633. 
Extra-morainic fringe, Williams, E. H., 634. 
Harrisburg terraces, Bashore, 16. 
Microscopic structure«of oolite, Hovey, 290. 
Origin of the Pennsylvania anthracite, Ste- 
venson, 546. 
Paleozoic intraformational conglomerates, 
Walcott, 607. 
Potomac and Roaring Creek coal fields, 
Weeks, 618. 
Sadsbury steatite, Rand, 469, 
Slate binders of the Pittsburg coal bed, 
Gresley, 228. 
Some new red horizons, Lyman, 370. 
South Mountain glaciation, Williams, E. H., 
632. 
Petrology. 
Arizona. 
Petrographical character of the lavas, Id- 
dings, 306. 
A rkansas. 
[Novaculites of Arkansas], Hinde, 275. 
Origin of novaculites, Rutley, 482. 
California. 
Eruptive rocks of Point Bonito, Ransome, 
471. 
Geological notes on the Sierra Nevada, 
Turner, 564. 
Geology of Angel Island, Ransome, 472. 
Geology of Carmelo Bay, Lawson, 352. 
Gold-silver veins of Ophir, Cal., Lindgren, 
363. 
Lherzolite-serpentine and associated rocks, 
Palache, 436. 
Sacramento folio, Lindgren, 362. 
Petrology — Continued. 
California — Continue 
Soda-rhyolite north of Berkeley, Palache, 435. 
Canada. 
[Beaver Creek meteorite], Merrill, G. P., 412. 
Crystalline rocks near St. John, Matthew, 
W. D., 408. 
Diabase dikes in the Thousand Islands, 
Smyth, C.H., jr., 525. 
Intrusive i ocks near St. John, Matthew, W. D., 
407. 
Multiple diabase dike, Lawson, 355. 
Nephcline syenite from Ontario, Adams, 1. 
Colorado. 
Description of igneous formations, Cross, 109. 
Intrusive sandstone dikes in granite, Cross, 
110. 
Pikes Peak folio, Cross, 108. 
Guatemala. 
Kenntniss der jungen Eruptivgesteine der 
Guatemala, Bergeat, 24. 
Maryland . 
Granites of Cecil County, Grimsley, 229. 
Harpers Ferry folio, Keith, 321. 
Massachusetts. 
Mount Greylock, Dale, 122. 
The structure of Monument Mountain, Dale, 
121. 
Michigan. 
Microscopic study of Michigan rocks, Patton, 
438. 
Quartzite tongue at Republic, Smyth, H. L., 
529. 
Rocks and minerals from Michigan, Lane, 350. 
Minnesota. 
Basic massive rocks of Lake Superior region, 
Bay ley, 17. 
Field work in Minnesota, Elftman, 169. 
Geology of Itasca County, Culver, 115. 
Geology of Kekequabic Lake, Grant, 223. 
Iron-bearing rocks of the Mesabi range, 
Spurr, 540. 
Volcanic rocks in the Keewatin, Grant, 225. 
Missouri. 
Cherts of Missouri, Hovey, 291. 
Montana. 
Livingston folio, Iddings and Weed, 307. 
New Jersey. 
Age of the crystalline limestones of New 
Jersey, Westgate, 620. 
Leucite in Sussex County, N. J., Kemp, 328. 
• Microscopic structure of oolite, Hovey, 290. 
Mineralogical character of New Jersey lime- 
stones, Westgate, 619. 
New York. 
Basic rock derived from granite, Smyth, C. H., 
jr., 527. 
Gabbros in the Adirondack region, Smyth, 
C. H, jr., 524. 
Gabbros on western shore of Lake Cham- 
plain, Kemp, 325. 
Rhode Island. 
An orbicular granite from Rhode Island, 
Kemp, 327. 
South Dakota. 
Phonolite rocks from the Black Hills, Pirsson, 
456. 
