GENERAL INDEX. 831 
Paleozoic Crinoids, 166. 
Palmars (Palmaria), 15, 34, 71, 73. 
Parabasalia, 53. 
Parisocrinus, 45, 77, 1382, 159, 161. 
Parasitic growths. (Pl. IV, figs. 18-20.) 
Patelliocrinus, 79, 124, 265, 307. 
-——. chiastodactylus, 265. 
duplicatus, 265. 
—— fulminatus, 265. 
pinnulatus, 265. 
Pelmatozoa, 27, 144. 
Pelvis, 13. 
Pentacrinacea, 30. 
Pentacrinide, 41, 59, 65, 117, 152. 
Pentacrinus, 13, 88, 45, 49, 60, 65, 69, 81, 
141, 152. 
—— asterias, 65. (Pl. VI, fig. 8.) 
—— caput-medusa, 11, 14, 28. 
—— europeus, 14. 
—— naresianus, 51. 
—— Wyville-Thomsoni, 49. 
Pentagonal base, 165. 
Pentamera, 31. 
Pentamerous symmetry, 147, 165. 
Pentaphyllum, 145. 
Pentremites, 14. 
Periechocrinites, 46, 86, 362, 366, 519. 
Periechocrinus, 46, 362, 365, 519, 520, 554. 
amplus, 530. 
—— COhristyt, 522. 
—— Howardi, 529. 
—— infelix, 525. (PI. L, figs. 2a-d.) 
—— marcouanus, 523. (PI. L, figs. 7a, b; 
LI, fig. 5.) 
—— moniliformis, 520. 
—— necis, 524, (PI. L, figs. 1a, b.) 
ornatus, 527. (Pl. L, figs. 38a, b; LI, 
Cee dee) 
—- pyriformis, 526. 
—— Sspeciosus, 521, 528. (PI. L, figs. 6a, b.) 
—— tennesseensis, 528. (Pl. L, fig. 4.) 
—— tenuidiscus, 531. (Pl. XLVI, fig. 4; 
LI, fig. 6.) 
—— urniformis, 526. (Pl. L, figs. 5a, b.) 
— Whitei, 530, 626. (Pl. XLVI, figs. 1-3; 
LI, figs. 9, 10.) 
Whitfieldi, 522, 526. (Pl. LI, figs. 1-4.) 
Periglyptocrinus, 80, 198, 264, 277. 
Billingsi, 277. (Pl. XXI, figs. 1a, b.) 
priscus, 278. (Pl. XXT, fig. 2.) 
Perisomic plates, 36, 118. 
Phialocrinus, 80. 
Phillipsocrinus, 294. 
Phylogenetic history represented in individual 
growth, 104, 166. 
Physetocrinus, 85, 109, 122, 548, 550, 554, 
593, 637. 
inner floor o1, 120; 
—— asper, 596. (Pl. LXIII, figs. 7a, b.) 
—— Copei, 598. (Pl. LXIII, fig. 5.) 
dilatatus, 595. (Pl. LXIV, figs. 9, 10.) 
—— lobatus, 599. (Pl. LXIII, figs. 8a, b.) 
——ormatus, 997. < (Gel Vehicle NOn ele 
figs. 1-4.) 
subventricosus, 598. 
ventricosus, 593. (Pl. IV, fig.2; LXIII, 
fig. 6; LXIV, figs. 1-8b.) 
Pinnastella, 16. 
Pinnata, 152, 155, 169. 
Pinnules, 34, 78, 80, 85, 155, 160. 
Pisocrinus, 57, 70, 72, 186, 157, 172, 205. 
(Pl. XII, fig. 10.) 
pilula, 90. 
Planus group, 668. 
Platyceras attached to Crinoids, 240, 566, 793, 
800. 
Platycrinide, 17, 83, 106, 124, 163, 166, 
170, 642, 743, 808. 
distribution of, 643. 
Platycrinites, 647. 
Platycrinus, 13, 41, 46, 48, 57, 77, 79, 83, 91, 
94, (96, 1025 1115, 113, 135,14. o mig euiles: 
642, 644, 647, 719, 730, 738, 744, 750, 753. 
(Els JONV, aise, Ga) 
absentivus, 650. 
—— acclivus, 663. 
—— equalis, 674. (Pl. LXXI, figs. 4a—5.) 
—— equiternus, 658, 659. (Pl. LXXI, fig. 
12.) 
—— eternalis, 650, 688. 
—— Agassizi, 656, 669. (Pl. LXIX, fig. 4.) 
—— alabamensis, 650, 678, 680. 
—— allophylus, 685. (Pl. LXXI, fig. 17.) 
amabilis, 650. 
americanus, 686. (Pl. LXXV, figs. 10- 
13¢.) 
annosus, 650. 
altidorsatus, 650. 
asper (Goldf.), 690. 
asper (M. and W.), 690. (Pl. LXVIII, 
figs. 9a, b.) 
batiola, 650, 674. 
