WEEKS.] 
PETROLOGY, AND MINERALOGY FOR 1892-1900. 
235 
Paleontology— Continued. 
(it ncm and species <h scribal — Continued. 
Lyropora goldfussi Billings(sp.),Lambe, 3374. 
retrosa Meek and Worthen, Keyes, 8062. 
Lyroporella, Simpson, 4983. 
Lyroporidra n. gen., Simpson, 4983. 
Lyroporina n. gen., Simpson, 49.su. 
Lyrosoma Conrad, Whitfield, 0101. 
sulcosa, Whitfield, 6101. 
Lyrtoceras batesi (Trask |, Stanton, 5199. 
jukesii Sharpe, Whiteaves, 6085. 
Lysactinella n. gen., Girty, 2034. 
hwactinella Girty, Hall and Clarke, 2269, 
2270. 
gebhardi n. sp., Girty, 2034. 
perelegans n. sp., Girty, 2034. 
Lysorophus triearinatus Cope, Case, 773. 
Lytoeeras Suess, Smith, 5052. 
alamedense n. sp., Smith, 5052. 
Lyttonia Waagen, Hall and Clarke, 2261a, 
2264. 
Macandrevia King, Hall and Clarke, 2261. 
(Antiptychina Zittel), Hall and Clarke, 
2264. 
(Aulacothyris Douville), Hall and Clarke, 
2264. 
(CamerothyrisBittner), Hall and Clarke, 
2264. 
(Epieyrta Deslongchamps), Hall and 
Clarke, 2264. 
(Eudesia King), Hall and Clarke, 2261. 
(Fimbriothyris Deslongchamps), Hall 
and Clarke, 2261. 
(Microthyris Deslongchamps), Hall and 
Clarke, 2264. 
(Orthotoma Quenstedl i, Hall and Clarke, 
2261. 
(Plesiothyris Douville), Hall and Clarke, 
2264. 
(Zeilleria Bayle), Hall and Clarke, 2264. 
Macclintockia cretacea Beer, Lesquereux, 
3470. 
trinervis Heer, Dawson, 3470. 
Machaerodus Kaupp, Cope, L104. 
erassidens Cragin, Williston, 6228. 
graeilis Cope, Cope, 1104. 
Maclurea (Leuseur) Woodward, Ulrich and 
Scofield, 5541. 
affinisBill., Whitfield, 6106. 
bigsbyi Hall, Clrieh and Scofield, 5511. 
var. dixonensis n. var., Ulrich ami 
Scofield, 5541. 
bigsbyi, Whit Held, 6102. 
crassa n. sp., Ulrich and Scofield, 5541. 
var. macra n. var., Clrieh and Sco- 
field, 5541. 
depressa n. sp., Clrieh and Scofield, 5541. 
knoxvillensis n. sp., Clrieh and Scofield, 
5541. 
magna (Le Sueur) , Keyes, 3062. 
manitobensis, Whiteaves, 6076. 
nitida n. sp., Ulrich and Scofield, 5541. 
Macluria (Maclurina) manitobensis Whit- 
eaves, Whiteaves, 6087. 
Maclurina n. gen., Ulrich and Scofield, 5541. 
cuneata Whitfield, Ulrich and Scofield, 
5541. 
Paleontology— Continued. 
Genera and species described— Continued. 
Maclurina manitobensis Whiteaves, Ulrich 
and Scofield, 5541. 
subrotunda Whitfield, Ulrichand Scofield, 
5541. 
Macoma Leach, Dall, 1281. 
alumensis n. sp., Dall, 1281. 
balthica Linne, Dall, 1281. 
calcarea Gmelin, Dall, 1281. 
(?) calhounensis n. sp., Dall, 1281. 
conradi n. sp., Dall, 1281. 
constricta Bruguiere, Dall, 1281. 
irma n. sp., Dall, 1281. 
kelseyi n. sp.,Dall, 1281. 
laxa n. sp., Dall, 1281. 
lenis Conrad, Dall, 1281. 
lyelli Dall, 1281. 
tentaSay, Dall, 1281. 
virginiana Conrad, Dall, 1281. 
(Cymatoica) Vendryesi n. sp., Dall, 1281. 
(Psammacoma) aurora Hanley, Dall, 1281. 
brevifrons Say, Dall, 1281. 
? holmesii n. sp., Dall, 1281. 
olivella n. sp., Dall, 1281. 
? producta Conrad, Dall, 1281. 
tageliformis n. sp., Dall, 1281. 
tracta n. sp., Dall, 1281. 
(Rexithaerus) secta Conrad, Dall, 1281. 
Macrepistins arenatus n. gen. et sp., Cope, 
1093. 
Macrocaris n. gen., Miller, 3995. 
gorbyi n. sp., Miller. 3995. 
Macrochilina blairi n. sp., Miller, 3992. 
pulchellan. sp., Whiteaves, 6074. 
Macrocrinus W. and Sp. (nov. gen.), Wachs- 
mnth and Springer, 5765a. 
carica (Hall), Wachsmuth and Springer, 
5765a. 
gemmiformis (Hall), Wachsmuth and 
Springer, 576."). 
jucundus i.M. and G.), Wachsmuth and 
Springer, 5765a. 
konincki (Shuiii.i, Wachsmuth and 
Springer, 5765a. 
lagunculus (Hall), Wachsmuth and 
Springer, 5765a. 
verneuilianus (Shum. i, Wachsmuth and 
Springer, 5765a. 
Macrodon Lycett, Grabau, 2086. 
Macrodon Lycett, Woods, 6431. 
blairi n. sp., Miller and Gurley, 4002. 
cochlearis Win., Weller, 6006. 
facetus n. sp., Miller and Gurley, 4002. 
hamiltonke Hall, Grabau, 2086. 
modesta (Win.), Weller, 6006. 
obsoletus Meek, Keyes, 3062. 
pettisensis n. sp., Miller and Gurley, 4002. 
pygmseus n. sp., Whiteaves, 6074. 
sangamonensis? Worthen, Keyes, 3062. 
tenuistriatus Meek and Worthen, Keyes, 
3062. 
sp., Weller, 5994. 
Macroheilus priscus, Whitfield, 6099. 
regularis, Whitfield, 6099. 
subcorpulentus, Whitfield, 6099. 
Macrochilina keyesi n. sp., Rowley, 4677a. 
