20 Echin, 
V. Echinoderma. 
[1915] 
f Ecliinocardium with E. depressum 
sp. n. Cainozoic, U.S. A., Clark & 
Twitohell U.S. Geol. Surv. 54 pp. 213- 
214 pi. xcviii figs. 3a-c. 
•\Echinocidaris Clark & Twitohell 
49. 
■ \Echinocorys vulgaris Brooks 19. 
t Echinocrinus Girty 77. 
Echinocyamus megapetalus Mauritius ; 
elongatus Hawaiian Islands ; platytatus 
Victoria ; ineertus Hawaiian Islands ; 
spp. n., Clark Mem. Mus. Comp. Zool. 
Harvard Coll. 46 pp. 60-64 pis. 127 
figs. 1-6 pi. 128 figs. 1-3 & figs. ; E. 
pusillua Medes 138. 
^Echinocyamus with E. tcxanus , 
vaughani spp. n. Cainozoic, U.S. A., 
Clark & Twitohell U.S. Geol. Surv. 64 
pp. 119-120, 160 pi. lvii figs. 2a-d ; 
Ixxiv figs, la-d ; E. pusillus Couffon 
63. 
Echinodiscus auritus Clark 41. 
^Echinodiscus Lambert 120. 
Echinoidea Clark, 44 & 45 ; Clarke 
& Wheeler, 48 ; Fabiani, 66 ; Hofsten, 
103 ; Montuori, 145 ; Mortensen, 150 ; 
Terni, 206 ; Wester, 216. 
| Echinoidea Lambert, 119; Sciioen- 
dorf, 189. 
Echinolampas Clark 41. 
f Echinolainpas with E. alrichi sp. n. 
Cainozoic, U.S. A., Clark & Twitciiell 
U.S. Geol. Surv. 54 pp. 149, 173 pi. 
lxxxi figs, la-d, 2 ; E. similis 
Lambert, 120 & 117 ; Brown, 20 ; CookE, 
50. 
Echinometra mathcei Clark 41 ; 
Jacobs, 108 
Echinostrephus molarc Clarke 41. 
Echinothrix diadema Clark 41. 
Echinus acutus Gray, 85; Herdman, 
95 ; Echinus esculentus Medes, 138 ; 
Moore, Whitley & Adams, 147 ; Moore, 
Whitley & Webster, 148; Retzius, 
179 ; E. e. var dep'cssus Meyer, 139 ; 
E. microtuberculatus Herbst, 94 ; Runn- 
strom, 183 j E. miliaria Sciimalz, 
186 ; Milligan, 144. 
f Echinus Clark & Twitohell 49. 
| Enallaster Clark & Twitohell 49. 
■\Eucope Clark & Twitohell 49. 
\Eoscutum dubaleni Lambert 120. 
\Eupatagus carolinensis fioridanus 
spp. n. Cainozoic U.S. A., Clark & 
Twitohell U.S. Geol. Surv. 54 pp. 153, 
176 pis. lxxi figs. 3a-d, 4 ; lxxxii figs. 
3a-d ; Ixxxiii figs, la-c, 2a-(l ; E. 
Cooke 50. 
f Euspatangus Spengler 199. 
Fihularia volva Clark 41. 
t Fibidaria atfinis Lambert 120. — F 
Clark & Twitciiell, 49 ; Lambert 117. 
Fibulariidae Clark 45. 
t Gagaria arnerieana sp.n. Cainozoic, 
U.S. A., Clark & Twitohell U.S. Geol. 
Surv. 54 p. 159 pi. lxxiii figs. 8a-b. 
]Oalerite s Clark & Twitohell 49. 
1[Goniopygu8 Clark & Twitohell 49. 
Gymnechinus robillardi Clark 41. 
Heliocidaris Mortensen 149. 
t Hemiaster with II. bexari, comanchei, 
beeclieri spp. n. Mesozoic, U.S. A., 
Clark & Twitohell U.S. Geol. Surv. 54 
pp. 88-98 pi. xlvi figs, la-e, 2a-d, 1 
figs. 2a-c. 
t Hemicidaris bravenderi Odling 
158; II . Clark & Twitohell 49. 
f Bemipatagus argutus, subrostratus 
spp. n. Cainozoic U.S. A., Clark & 
Twitohell U.S. Geol. Surv. 54 pp. 150- 
151 pi. lxix figs, la-d, 2a-b. 
t Hemipedina Clark & Twitciiell 49. 
‘ \IIeterodiadema ornatum sp. n. 
Mesozoic, U.S. A., Clark & Twitohell 
U.S. Geol. Surv. 54 p. 56 pi. xviii figs. 
2a-f. 
Uipponoe ( Tripncusles ) esculcnta 
Tennent 205. 
\IIolaster Clark & Twitohell 49 ; 
Gregory 86. 
f Holectypus with II. pealei , cragini 
spp. n. Mesozoic, U.S.A., Clark & 
Twitohell U.S. Geol. Surv. 54 pp. 33- 
34, 65 pi. v figs. 3a-b, 4; II. depressus 
Petitolero 167. 
Uolopneustes purpurascens Morten- 
sen 149. 
\Ilypodiadema elegans sp. n. 
Mesozoic, U.S.A., Clark & Twitohell 
U.S. Geol. Surv. 54 p. 52 pi. xiv figs. 2a- 
b. 
| Ilypsospatangus meneghini Lambert 
120 . 
■\Lagana tenuissima Lambert 120. 
