818 GENERAL INDEX. 
Agaricocrinus elegans, 500. (Pl. XL, figs. 3a, b.) 
eris, 481. 
excavatus, 489, 491. (Pl. XXXIX, 
figs. 3-9.) 
fiscellus, 512. (Pl. XXXVIII,. figs. 
3a-C.) 
geometricus, 508, 
germanus, 50d. 
— Gorbyi, 495. 
—— gracilis, 513. (Pl. XLI, figs. 3a-c.) 
— helice, 481. 
indianensis, 495. 
— inflatus, 502. (Pl. XLI, figs. 1la-d.) 
— Macadamsi, 498. 
— nodosus, 489, 493. (Pl. XLIII, fig. 9.) 
—— nodulosus, 497. (PI. XL, fig. 2; XLIII, 
figs. 7a, b.) 
var. Macadamsi, 498. (Pl. XX XIX, 
fig. 6.) 
ornotrema, 506. 
—— pentagonus, 493, 495, 509. 
var. convexus, 508. 
—— planoconvexus, 503. (Pl. XXXVIII, 
figs. 6a-c.) 
pyramidatus, 512. (Pl. XX XVIII, figs. 
44-56.) 
Sampsoni, 505. (Pl. XLVI, fig. 5.) 
—— splendens, 495. (Pl. XL, figs. lac.) 
— Springeri, 510. 
stellatus, 508. (Pl. XXXVIII, figs. 
7a-e. ) 
tuberosus, 490. 
—— Whitfieldi, 496. (Pl. XLII, fig. 3; 
XLII, figs. 8a, b.) 
—— Wortheni, 488, 490, 493. (Pl. III, fig. 22; 
XXXIX, fig. 9; XL, figs. 5a-d.) 
Agassizocrinus, 17, 45, 59, 145. 
‘* Albatross” dredgings, 28. 
Allagecrinus, 28, 78, 87, 89, 92, 150, 172. 
——Carpenteri. (Pl. VIII, fig. 11.) 
Allocrinus, 124, 265, 267, 306. 
—— Benedicti, 308. (Pl. XXIV, figs. 8a, b.) 
—— typus, 307. (Pl. XXIV, figs. 7a, b.) 
Alloprosallocrinus, 361, 406, 414, 430. 
—— conicus, 407, 431. (Pl. XLII, figs. 
14a-c.) 
depressus, 407. 
euconus, 407, 430. 
Gurleyt, 407. 
Alternate arrangement of parts below radials, 
60. 
pee 
Ambulacra, 35,99, 100, 104, 120, 155. 
of Camerata, 100, 107, 114. 
of Fistulata, 99. 
of Ichthyocrinide, 101, 123. 
—— of Larviformia, 101. 
of Recent Crinoids, 101. 
Ambulacral canal, 100. | 
Ambulacral plates, 35, 101, 119. 
Ambulacral skeleton. (PI. IV, fig. 9; Pl. V, 
figs. 1 and 10.) 
Ambulacral vessels, 36. 
Americanus group, 686. 
Amphora, 586. 
Amphoracrinus, 85, 454, 483, 486, 550, 554, 
586. 
—— americanus, 488. 
bellatrema, 506. 
concavus, 482. 
—— divergens, 588. (Pl. LXII, figs. 5-10.) 
var. multiramosus, 588, 590. 
excavatus, 491. 
— Gilbertsoni, 587. 
inflatus (Hall, 1860), 591. 
—— inflatus (Hall, 1861), 502. 
Jjerseyensis, 587. 
—— planobasilis, 588. 
-—— planoconvexus, 503. 
quadrispinus, 588. 
—— spinobrachiatus, 591. (Pl. LXII, figs. 
1-4.) 
subturbinatus, 466. 
—— viminalis, 587,.590. (Pl. LIV, fig. 8.) 
Anal plates, 17, 83, 105, 124, 189, 147, 165, 
364. 
development of, 131. 
special or first (Pl. X), 34, 125, 147. 
Anal tube, 35, 134. 
abnormal growths of, 185. (PI.IV, figs. 
9-17.) 
An-ambulacral plates, 35. 
Anchylosis, 37. 
Ancyrocrinus, 45, 50. 
Anisocrinus, 77. 
Anomalocrinus, 41, 57, 67, 71, 78, 116, 130, 
158. 
caponiformis, 746. 
Antedon, 82, 147, 153. 
Pentacrinoid larva of, 152. (PI. VI, figs. 
13-15.) | 
— regalis, 107. 
—— rosacea, 64. (Pl. VI, figs. 18, 19.) . 
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