292 INDEX TO NORTH AMERICAN GEOLOGY, PALEONTOLOGY, [bull. 189. 
Paleontology— Continued. 
Genera and species described — Continued. 
Triforis distincta O. Meyer, Dall, 1259. 
mitellan. sp., Dall, 1259. 
modesta C. B. Adams, Dall, 1259. 
perversa Linne\ var. nigrocincta Adams, 
Dall, 1259. 
terrebrata Heilprin, Dall, 1259. 
terebrata, Whitfield, 6101. 
sp.?, Guppy and Dall, 2214. 
Triga cceni n. sp., Scudder, 4900. 
Trigeria Bayle, Grabau, 2086. 
Bayle, Hall and Clarke, 2261a, 2264. 
(?) lepida Hall, Grabau, 2086. 
Trigonarca pulchra var., Harris, 2313. 
depressa (White), Stanton, 5191. 
obliqua Meek, Stanton, 5191. 
Trigonia clavigera n. sp., Cragin, 1115. 
concentrica n. sp., Cragin, 1115. 
diversicostata Whiteaves, 6095a. 
elegantissima Meek, Stanton, 5206. 
emoryi, Stanton, 5197. 
eufaulensis, Harris, 2315. 
montanaensis Meek, Stanton, 5206. 
securiformis n. sp., Cragin, 1115. 
stolleyi n. sp., Hill, 2539. 
taffi n. sp., Cragin, 1115. 
vyschetzkii n. sp., Cragin, 1115. 
Trigonocarpum ampulla^forme Lx., White, 
6052. 
dawsonianum n. sp., White, 6052. 
helenee n. sp., White, 6052. 
Trigonodictya n. gen., Ulrieh, 5737. 
conciliatrix Ulrieh, Ulrieh, 5537. 
Trigonoscuta inventa, Scudder, 4840. 
Trigonosemus Koenig, Hall and Clarke, 2264. 
Trigonostoma subthornasia" n. sp., Dall., 1259. 
Triisodon Cope, Matthew, 3801. 
biculminatus Cope, Osborn and Earle, 
4191. 
gaudrianus (Cope), Matthew, 3801. 
heilprianus Cope, Matthew, 3801. 
Trimerella Billings, Hall and Clarke, 2260. 
grandis Billings, Whiteaves, 6080. 
ohioensis Meek, Whiteaves, 6080. 
Trinacria C. Mayer, Dall, 1272. 
meekii n. sp., Dall, 1272. 
Trinucleus concentricus, Beecher, 367. 
ornatus, Beecher, 366. 
Trionyx virginiana n. sp., Clark, 904, 906. 
Triplecia Hall, Hall and Clarke, 2260. 
Triplecia Hall, Winchell and Schuchert, 6318. 
niagarensis, Hall and Clarke, 2268. 
ortoni, Foerste, 1835. 
ulrichi n. sp., Winchell and Schuchert, 
6318. 
Tripleuroceras robsoni n. sp., Whiteaves, 6089. 
Triplicosta n. subgen., Cooper, 1072. 
Tripioceras, Hyatt, 2819. 
Triplophyllum, n. gen., Simpson, 4984. 
Tripocalpis Matthew, G. F,, 3760. 
Tripodiscium, Matthew, G. F., 3760. 
Tripteroceras lambii, Whiteaves, 6087, 6089. 
Iambi Whiteaves, 1891, Clarke, 953. 
oweni n. sp., Clarke, 953. 
planoconvexum Hall, 1861, Clarke, 953. 
planodorsatum, Whitfield, 1882, Clarke, 
953. 
Paleontology— Continued. 
Genera and species described — Continued. 
Tripteroceras semiplanatum Whiteaves, Whit- 
eaves, 6087. 
, sp.?, Clarke, 953. 
Trirachodon, Case, 768. 
Tritaxia tortilis (Reuss) , Bagg, 150. 
tricarinata (Reuss), Bagg, 150. 
Tritia bidentata, Whitfield, 6101. 
trivittatoides n. sp., Whitfield, 6101. 
trivittatoides var. elongata n. var., Whit- 
field, 6101. 
Triton eocense n. sp., Whitfield, 6097. 
tuomeyi Aid., Harris, 2316. 
(Epidromus) otopsis Con., Harris, 2316. 
prsecedens n. sp., Whitfield, 6097. 
(Ranularia) eocensis, Harris, 2315, 2316. 
Aid., Harris, 2311. 
(Simpulum) showalteri, Harris, 2310. 
Tritonidea huerfanensis n. sp., Stanton, 5191. 
? huerfanensis, Stanton, Herrick, and 
Johnson, 2465. 
johnsoni, Aid., Harris, 2316. 
obesa n. sp., Whitfield, 6097. 
pachecoi n. sp., Harris, 2315. 
pauper n. sp., Dall, 1259. 
Tritonium kanabense, Stanton, Herrick, and 
Johnson, 2465. 
kanabense n. sp., Stanton, 5191. 
Tritylodon, Case, 768. 
Triumphis hatchetigbeensis Aid., Harris, 2316. 
Trochacreon cylindraceus ? Stoliczks, Whit- 
eaves, 6095a. 
Trochammina inflata (Montagu), Bagg, 150. 
inflata Montagu sp., Woodward and 
Thomas, 6433. 
Trochita perarmata, Whitfield, 6101. 
Trochoceras, Hyatt, 2819. 
desplainense McChesney,Whiteaves, 6080. 
insigne n. sp., Whiteaves, 6089. 
(?) mccharlesii Whiteaves, Whiteaves, 
6087. 
Trochocyathus californianus, n. sp.,Vaughan, 
5735. 
cingulatus n. sp., Vaughan, 5735. 
clarkeanus (Vaughan), Vaughan, 5735. 
conoides (Gabb and Horn), Vaughan, 5735. 
depressus n. sp., Vaughan, 5735. 
hyatti n. sp., Vaughan, 5735. 
lunulitiformis (Conrad), Vaughan, 5735. 
var. montgomeriensis n. var., 
Vaughan, 5735. 
stantoni n. sp., Vaughan, 5735. 
striatus (oabb), Vaughan, 5735. 
woolmani n. sp., Vaughan, 5736. 
zitelli Merriam, Vaughan, 5735. 
Trocholites, Hyatt, 2819. 
ammonius Hall, Hyatt, 2819. 
anguiformis, Hyatt, 2819. 
blakei Hyatt, 2819. 
canadensis, Hyatt, 2819. 
depressus, Hyatt, 2819. 
dyerin. sp., Hyatt, 2819. 
hospes, Hyatt, 2819. 
internastriata, Hyatt, 2819. 
incongruus Ang. et Lindst., Hyatt, 2819. 
Trocholitoceras n. gen., Hyatt, 2819. 
eichwaldi, Hyatt, 2819. 
