196 
INDEX TO NORTH AMERICAN GEOLOGY, 
[bull. 27m 
Paleontology— Continued. 
(,'( nera and spt ties described— Continued. 
Desmograptusintricatus n. sp., Ruedemann, 1. 
Diacranodus texensis Cope, Broili, 2. 
Dichograptus Salter, Ruedemann, 1. 
octobraehiatus Hall (sp.), Ruedemann, 1. 
Dictyocoryne profunda Ehrenberg, Martin, 6. 
Dictyonema Hall, Ruedemann, 1. 
flabelliforme Eichwald (sp.), Ruede- 
mann, 1. 
furciferum n. sp., Ruedemann, 1. 
murrayi Hall, Ruedemann, 1. 
rectilineatum n. sp., Ruedemann, 1. 
Dictyoretmon n. gen., Whitfield, 1. 
burlingtonense n. sp., Whitfield, 1. 
Didyrnograptus McCoy, Ruedemann. 1. 
acutidens Lapworth ms., Elles and Wood 
em., Ruedemann, 1. 
bifidus Hall sp., Ruedemann. 1. 
(Isograptus) caduceus Salter em. Ruede- 
mann, Ruedemann, 1. 
caduceus Salter nanus n. niut., Ruede- 
mann. 1. 
cuspidatus n. sp., Ruedemann, 1. 
ellesi n. sp., Ruedemann, 1. 
extensua Hall sp., Ruedemann, 1. 
gracilis Tornquist, Ruedemann, 1. 
filiformis Tullberg, Ruedemann, l. 
Eorcipiformis n. sp., Ruedemann, 1. 
incertus n. sp., Ruedemann, l. 
nanus Lapworth, Ruedemann, 1. 
nicholsoni Lapworth var. planus Elles 
and Wood, Ruedemann, 1. 
nitidus Hall sp., Ruedemann, l. 
patulus Hall sp.. Ruedemann, 1. 
similis Hall sp., Ruedemann, 1. 
spinosus ii. sp., Ruedemann, 1. 
tornquisti n. sp.. Ruedemann, 1. 
Distepnanus crux (Ehrenberg), Martin, 6. 
speculum (Ehrenberg), Martin, 6. 
Dimetrodon, case, 2, 3. 
gigas, Case, 2. 
incisivus, < !ase, 2. 
incisivus Cope, Broili. 1. 
Dinobolusconradi Hall, Kindle and Breger,l 
Diphyphyllum dilatuni n. sp., Greene, 4. 
Diplocaulus Cope, Broili, 1. 
Diplocaulus Cope, Case, 1. 
copei n. sp., Broili, 1. 
magnicornis Cope, Broili, l. 
piisillus n. sp., Broili, 1. 
Diplodocus longus, Osborn, 7. 
Diplodonta acclinis Conrad, Glenn, •">. 
shilohensis Hall, Glenn, •">. 
subvexa (Conrad), Glenn, 5. 
sp., Dall, 1. 
Diplograptus McCoy, Ruedemann, 1. 
dentatus Brongniart sp., Reudemann, 1. 
inutilis Hall, Ruedemann, 1. 
laxus n. -]»., Ruedemann, 1. 
longicaudatus n. sp., Ruedemann, 1. 
Diploneis microtatos var. christianii Cleve, 
Hover, 1. 
Dipoides Jager, Matthew and Gidley, l. 
tortus (Leidy), Matthew and Gidley, 1. 
Discinisca lugubris (Conrad), Martin, 4. 
Discorbina Parker and Jones, Bagg, 3. 
Paleontology — Continued. 
Genera and species described — Continued. 
Discorbina orbicularis (Terquem), Bagg, 3. 
Dissacus saurognathus Wortman, Osborn, 11. ' 
Divaricellaquadrisulcata (d'Orbigny), Glenn,* 
5. 
Dolatocrinus Lyon, Wood (Elvira), 1. 
asterias n. sp., Wood (Elvira), 1. 
charlestownensis Miller and Gurley, Wood 
(Elvira), 1. 
costatus n. sp., Wood (Elvira), 1. 
exea-\ atus \V. and sp.. Rowley, Greene, 3,8 
excavatus Wachsmuth and Springer, 
Wood (Elvira), 1. 
greenei Miller ami Gurley, Wood ( Elvira )■ 
1. 
hammelli Miller and Gurlev, Wood (El- 
vira),l. 
major Wachsmuth ami Springer, Wooi 
(Elvira), 1. 
ornatus Meek, Wood (Elvira), 1. 
salebrosus Miller and Gurley, Wood (E 
vira),l. 
triadactylus Barris, Wood (Elvira), 1. 
sp., Wood ( Elvira), 1. 
wachsmuthi n. noni., Wood (Elvira), 1. I 
Dolichobrachium gracilen. gen. and sp., Wii 
listen, 5. 
Dosinia acetabulum Conrad, Glenn, 5. 
'.' alaskana n. sp., Dall.l. 
Drillia calvertensis n. sp., Martin, 3. 
incilifera (Conrad), Martin, 3. 
incilifera var. angulata n. var., Martin, 3, 
incilifera var. distans (Conrad i, Martin, 3. 
limatula Conrad, Martin, :;. 
limatula var. dissimilis Conrad, Martin, 3. 
limatula var. pyramidalis n. var., Martin, 
3. 
pseudeburnea (Whitfield), Martin, 3. 
whitfieldi n.sp., Martin, :;. 
Dromopus a^ilis Marsh, Matthew (G. F.),l. 
Drupa rhabdosperma Lx., Perkins,*;. 
Dryptosaurus incrassatus (Cope),Lambe,l. 
Eatonia goodlandensis n. sp., Kindle anc 
Breger, 1. 
Echinocardiumorthonotum Conrad, Clark, 3 
Ecphora Conrad, Martin, 3. 
quadricostata (Say), Martin, 3. 
quadricostata var. umbilicata (Wagner) 
Martin, 3. 
tampaensis (Dall), Martin, 3. 
tricostata n. sp., Martin, 3. 
Edestus, Eastman, l. 
Emarginula marylandica n. sp., Martin, 3. 
Embolophorus (?) Cope, Case, 1. 
dollovianus Cope, em. Case, Broili, 1. 
Encrinurus indianensis n. sp., Kindle an 
Breger, 1. 
Engonoceras Neumayr, Lasswitz, 1. 
ambiguum Hyatt, Lasswitz, 1. 
duinbli Cragin sp., em. Lasswitz, Las 
witz, 1. 
G. Stolleyi Boehm, em. Lasswitz, L&i 
witz, 1. 
hilli Boehm, em. Lasswitz, Lasswitz, 1 
Ensis directus (Conrad), Glenn, 5. 
ensiformis Conrad, Glenn, 5. 
1- 
