weeks.] PALEONTOLOGY, PETROLOGY, AND MINERALOGY, 1898. 155 
Paleontology— Continued. 
Genera and species described— Continued. 
Solen sp., Harris, No. 334. 
Solenopleura arenosa Bill, sp., Matthew, No. 
535. 
var. angilimbata n. var., Matthew, No. 
535. 
robbii Hartt. mut. parva, Matthew, No. 
535. 
Sphserella sp., Harris, No. 334. 
Sphagiopora, Simpson, No. 702. 
Sphenia Turton, Dall, No. 184. 
attenuata n. sp., Dall, No. 184. 
Sphenopteris corrugata Newb., Newberry, No. 
573a. 
Spirifer cameratus Morton, Beede, No. 62. 
canandaiguse, Hall and Clarke, No. 327. 
crispatus, Hall and Clarke, No. 327. 
disjunctus Sowerby, var. sulcifer, Hall 
and Clarke, No. 327. 
keokuk Hall, Weller, No. 860. 
mucronatus Conrad, var. posterus, Hall 
and Clarke, No. 327. 
newberryi, Hall and Clarke, No. 327. 
williamsi, Hall and Clarke, No. 327. 
Spirillina orbicularis, n. sp., Bagg, No. 27. 
Spiroloculina planulata, Bagg, No. 27. 
Spiroplecta clarki, Bagg, No. 27. 
Spirophyton, Udden, No. 789. 
Spisula Gray, Dall, No. 184. 
(Hemimactra) Swainson, Dall, No. 184. 
curtidens n. sp., Dall, No. 184. 
delumbis Conrad, Dall, No. 184. 
densa n. sp., Dall, No. 184. 
dodona n. sp., Dall, No. 184. 
duplinensis n. sp., Dall, No. 184. 
magnoliana n. sp., Dall, No. 184. 
marylandica n. sp., Dall, No. 184. 
subponderosa Orbingy, Dall, No. 184. 
(Cymbophora) Gabb, Dall, No. 184. 
(Leptospisula) Dall, Dall, No. 184. 
(Schizodesma) Gray, Dall, No. 184. 
Spondylus bostrychites Guppy, Dall, No. 184. 
dumosis Morton, Dall, No. 184. 
echinatus Martyn, Dall, No. 184. 
rotundatus Heilprin, Dall, No. 184. 
sp., Harris, No. 334. 
Sporangites huronensis Dawson (?), Girty, 
No. 299. 
Squama, Logan, No. 498. 
lata Logan, Logan, No. 498. 
spissa Logan, Logan, No. 498. 
Standella Gray, Dall, No. 184. 
(Eastonia) Gray, Dall, No. 184. 
Stegosaurus, Case, No. 135. 
Stenognathus n. gen., Newberry, No. 573. 
Stenopora, Simpson, No. 702. 
Sterculia engleri n. sp., Kirchner, No. 442. 
snowii Lesq. (?), Hollick, No. 368. 
sp. ?, Hollick, Nos. 368, 370. 
Stethacantbus compressus n. sp., Newberry, 
No. 573. 
productus n. sp., Newberry, No. 573. 
Stictocella, Simpson, No. 702. 
Stictopora, Simpson, No. 702. 
Stictoporella n. gen., Simpson, No. 702. 
Paleontology — Continued. 
Genera and species desciibed — Continued. 
Stictoporina n. gen., Simpson, No. 702. 
Stomatopora, Simpson, No. 702. 
Stramenturn, Logan, No. 498. 
hawarthii Williston, Logan, No. 498. 
tabulatum, Logan, No. 498. 
Streblotrypa, Simpson, No. 702. 
Streptelasma, Hall, No. 325. 
strictum Hall, Girty, No. 300. 
Streptorhynchus ulrichi, Hall and Clarke, 
No. 327. 
williamsi n. sp., Weller, No. 860. 
Strobilites inquirendus n. sp., Hollick, No. 
370. 
Strophalosia cymbula, Hall and Clarke, No. 
327. 
rockfordensis, Hall and Clarke, No. 327. 
Strophomena conradi, Hall and Clarke, No. 
327. 
winchelli, Hall and Clarke, No. 327. 
Strophonella costatula, Hall and Clarke, No. 
327. 
Stropora, Simpson, No. 702. 
Synocladia, Simpson, No. 702. 
Synconodon n. gen., Osborn, No. 589. 
sexicuspis n. sp., Osborn, No. 589. 
Syringostoma barretti, n. sp., Girty, No. 300. 
centrotum, n. sp., Girty, No. 300. 
consimile, n. sp., Girty, No. 300. 
foveolatum, n. sp., Girty, No. 300. 
microporum, n. sp., Girty, No. 300. 
Syringothyris missouri, Hall and Clarke, No. 
327. 
Taenodictya, Simpson, No. 702. 
Taeniopora, Simpson, No. 702. 
Taxodium distichum miocenum Heer, New- 
berry, No. 573a. 
occidentale Newb., Newberry, No. 573a. 
Tectulipora, Simpson, No. 702. 
Tectuliporella, Simpson, No. 702. 
Teleoceras fossiger, Osborn, No. 586. 
Teleos tomes, Case, No. 133. 
Tellina, greggi, Harris, No. 334. 
subtriangularis, Harris, No. 334. 
(Arcopagia) trumani n. sp., Harris, No. 
334. 
Teredina Lamarck, Dall, No. 184. 
bowdeniana n. sp., Dall, No. 184. 
Teredo Linne, Dall, No. 184. 
Tetradium celiulosum Hall sp., Ruedemann, 
No. 674. 
Textularia abbreviata, Bagg, No. 27. 
agglutinans d'Orbigny, Bagg, No. 27. 
var. porrecta Brady, Bagg, No. 27. 
articulata, Bagg, No. 27. 
gibbosa d'Orbigny, Bagg, No. 27. 
globuloaa Ehrenberg, Bagg, No. 27. 
globulosa, McClung, No. 514. 
gramen d'Orbigny, Bagg, No. 27. 
sagittula Defrance, Bagg, No. 27. 
subangulata, Bagg, No. 27. 
turris d'Orbigny, Bagg, No. 27. 
Thamniscus, Simpson, No. 702. 
Thamnocella n. gen., Simpson, No. 702. 
Thamnotrypa, Simpson, No. 702. 
