veeks.J PETROLOGY, AND MLN PARALOGY FOR 1892-1900. 
169 
'aleontology— Continued. 
Genera and species described— Continued. 
Aceratherium platycephalum n. sp., Osborn 
and Wortman, 4189. 
propectum n. sp., Matthew, 3804. 
tridactylum Osborn, Osborn and Wort- 
man, 4189. 
tridactylum, n. sp., Osborn, 4182. 
trigonodum n. sp., Osborn and Wortman, 
4189. 
(Ccenopus) mite Cope, Osborn and Wort- 
man, 4189. 
Acerites multiformis n. sp., Lesquereux, 3470. 
sp., Newberry, 4080. 
Acervularia davidsoni Edwards and Haime, 
Keyes, 3061. 
davidsoni Edwards and Haime, Calvin, 
683. 
gracilis Billings sp., Lambe, 3375. 
profunda Hall, Calvin, 683. 
Acberontemys heckmani n. sp., Hay, 2382. 
Achtheres percarum, Beecher, 366. 
Acidaspis, Beecher, 354. 
Acidaspis, Clarke, 934. 
brevispinosa n. sp., Foerste, 1835. 
halli Shumard, Keyes, 3061. 
ortoni, Foerste, 1836, 
tuberculata, Beecher, 366. 
tuberculata Conrad, Clarke, 971 . 
Acila subgen. H.aml A. Adams, Dall, 1272. 
Aclis acuminata n.sp.,Guppy and Dall, 2214. 
prominensn. sp.,£ruppy and Dall, 221 1. 
(?) (Amblyspira) teres n.sp.,Guppy and 
Dall, 2214. 
Aclisina bellilineata n.sp., Miller, 3992. 
Acloiodictya n. gen., Hall and Clarke, 2269, 
2271. 
(?) eccentrica Hall (sp.), Hall and Clarke, 
2269,2271. 
niarsipus n. sp., Hall and Clarke, 2269, 
2271. 
Aconthens, Beecher, 366. 
Acraspedites antiquus Haeckel, Walcott, 5811. 
Acrocrinus W. and Sp. (n. sp.), Wachsmuth 
and Springer, 5765a. 
amphora W. and Sp. (n.sp.), Wachsmuth 
and Springer, 5765a. 
canaliculatus (M. and W.), Wachsmuth 
and Springer, 5765a. 
cassedayi (Lyon), Wachsmuth and 
Springer, 5765a. 
concavus (Meek and Worthen), Wachs- 
muth and Springer, 5765a. 
elegans (S. A. Miller), Wachsmuth and 
Springer, 5765a. 
helice (Hall), Wachsmuth and Springer, 
5765a. 
immatarus W. and Sp., Wachsmuth and 
Springer, 5765a. 
parvibasis W. and Sp., Wachsmuth and 
Springer, 5765a. 
parvus (Shum), Wachsmuth and Springer, 
5765a. 
radiatus W. and Sp., Wachsmuth and 
Springer, 5765a. 
shumardi Yandell, Wachsmuth and 
Springer, 5765a. 
Paleontology— Continued. 
(?< m ra and sprcies drscribed— Continued. 
Acrocrinus spinosulus (Hall), Wachsmuth 
and Springer, 5765a. 
subaculeatus (Hall), Wachsmuth and 
Springer, 5765a. 
wortheni Wachsmuth, Wachsmuth and 
Springer, 5765a. 
Acrogenia, Simpson, 4983. 
Acrogenia Hall, Grabau, 2086. 
prolifera Hall, Grabau, 2086. 
Acrostichites linseaefolius (Bunbury) Fon- 
taine, Ward, 5857. 
tenuifolius (Emmons) Fontaine, Ward, 
5857. 
Acrostichum hesperium, Newberry, 4083. 
simulatum n. sp., Knowlton, 3262. 
Acrothele Linnarsson, Hall and Clarke, 2260. 
bellulan. sp., Walcott,. 5808. 
decipiens n. sp., Walcott, 5808. 
gamagei (Hobbs), Grabau, 2092. 
matthewi Hartt, Matthew, 3761. 
var. costata n. var., Matthew, 3761. 
Acrotreta Kutorga, Hall and Clarke, 2260. 
gemma Billings, Walcott, 5816. 
gemmula n. sp., Matthew, 3751,3761. 
Actaeon chipolanusn. sp., Dall, 1269. 
cossmanni n. sp., Aldrich, 74. 
cossmanni Aid., Harris, 2316. 
cretacea, Whitfield, 6097. 
forbesiana n. sp., Whitfield, 6097. 
gabbana n. sp., Whitfield, 6097. 
galvestonensis n. sp., Harris, 2309. 
idoneus Con., Harris, 2316. 
myakkanus n. sp., Dall, 1269. 
prisca, Whitfield, 6097. 
propinquus Stanton, Berrick and John- 
son, 2465. 
propinquus U. sp., Stanton, 5191. 
quercollis n. sp., Han-is, 2310. 
shilohensis q. sp., Whitfield, 610. 
subovoides n. sp., Whitfield, 6097. 
traskiin. sp., Stearns, 5208,5209. 
Ristaxis) fusulus n. sp., Dall, 1269. 
(Tornatellaea) bella, Harris, 2310. 
Actinoceras, Hyatt, 2820. 
allumettense Billings, Whiteaves, 6087. 
beloitense Whitfield, 1877, Clarke, 953. 
bigshyi ? Bronn, Whiteaves, 6087. 
bigsbyi Stokes, 1840, Clarke, 953. 
remotiseptum Hall, 1850, Clarke, 953. 
richardsonii Stokes, Whiteaves, 6087. 
( Sactoceras ? ) canadense Whiteaves, Whit- 
eaves, 6087. 
Actinoconchus, see Athyris (Actinoconchus) 
McCoy, Hall and Clarke, 2261. 
Actinocrinus Miller, Keyes, 3061. 
Aetinocrinus J. S. Miller, Wachsmuth and 
Springer, 5765a. 
albersi n. sp., Miller and Gurley, 3998. 
arrosus n. sp., Miller and Gurley, 3997a. 
arrosus (S. A. Miller), Wachsmuth and 
Springer, 5765a. 
asperrimus (M. and W.), Wachsmuth and 
Springer, 5765a. 
augustatus n. sp., Miller and Gurley, 
3997a. 
