Pinacopus, 476, 479, 480, 481. 
P. gelasimus, 477. 
P. gonoplax, 477. 
P. sesamini, 481. 
Placodermic Ganoids, 528. 
PraciostoMaTA, 329, 330, 331, 528. 
Platycanthus isosceles, 525, 526, 527, 529. 
Pleuracanthus, 355, 359. 
Prevrovvus, 401, 458. 
P. woodi, 458. 
PrLevrocompPHus, 471. 
P. auriculatus, 472. 
Pnigacanthus, 529. 
Pascitopus, 410, 413, 415, 417, 427, 432, 441, 447. 
P. aliformis, 413, 431, 441. 
P. angustus, 414, 441, 449. 
P. corrugatus, 444. 
P. foveolatus, 413, 445. 
P. gibbus, 445, 446. 
P. jonesii, 413, 414, 441, 442, 443, 444, 445, 446. 
P, obliquus, 413, 414, 441, 443, 444, 446. 
P. parallelus, 413, 414, 427, 428, 430, 441. 
P. sublevis, 413, 414, 427, 428, 441. 
P. transversus, 413, 414, 441, 442, 443. 
PoLyRHIzovus, 415, 484, 485, 495, 496, 499, 508. 
. attenuatus, 503, 505. 
. colei, 500. 
. constrictus, 506. 
. elongatus, 500, 503, 504, 506. 
. mflecus, 500. 
. hittoni, 504. 
. magnus, 483, 484, 499, 500, 503. 
P. piasensis, 506. 
P. porous, 500. 
P. pusillus, 499. 
P. radicans, 500. 
P. sinuosus, 503, 504. 
P. truncatus, 500. 
PRISTICLADODUS, 382, 383, 384, 386. 
P. concinnus, 385. 
P. dentatus, 382, 383, 384, 389, 390. 
P. goughi, 382, 385, 389. 
P. springeri, 383. 
Pristopus, 519, 520, 521, 522. 
P. acuminatus, 520. 
P. falcatus, 519. 
PSAMMODONTIDA, 331, 332, 459. 
PsamMopus, 331, 352, 411, 412, 415, 420, 438, 451, 
459, 463, 518. 
P. canaliculatus, 459, 460. 
. conctus, 453. 
. contortus, 411, 421, 
. cornutus, 463. 
gibberulus, 405, 411. 
inflexus, 460. 
levissimus, 404. 
. linearis, 411, 508. 
. longrdens, 411. 
. magnus, £11. 
P. porosus, 411, 459, 460. 
Phy hy toto td td 
NS Ie) Ei) Ins} Fas) bs) Ens) Pas) as 
600 
. reticulatus, 411, 460. 
. rugosus, 411, 459, 460. 
. rugosus, var. porosus, 459, 460, 461. 
. subteres, 399, 400, 411. 
. tenurs, 411. 
PsEpnHopus, 403, 410, 415, 416, 419, 420, 428, 438, 
P. magnus, 403, 414, 416, 439, 453. 
Piychodus, 411, 412, 415. 
is) hs} ne) [nel Ia 
RuampPuonus, 389, 401, 408. 
R. dispar, 402. 
Rhinoptera, 490. 
Rhizodus, 524. 
Ruynmonpus, 473, 476. 
R. oblongus, 473, 474. 
R. transversus, 473, 474, 477. 
Lthynchodus, 330. 
ob 
SanpaLopus, 410, 436, 437. 
S. morrisi, 437, 438. 
Scotland, Limestone series of the west of, 544. 
Selachoider, 329. 
Sphenonchus, 378. 
S. conicus, 378. 
Squalides, 381. 
Squaloraja polyspondyla, 401. 
STICHACANTHUS, 371, 531. 
S. coemansi, 532. 
S. tortworthensis, 532. 
Srresiopus, 410, 415, 422, 423, 425, 428, 436, 437. 
S. colei, 425, 427. 
S. egertoni, 426. 
8S. olongus, 414, 422, 424, 426, 427. 
Strophodus, 411, 415, 451. 
S. longidens, 411. 
S. magnus, 411. 
S. reticulatus, 411. 
S. tenwis, 411. 
Teleoster, 328. 
Thecodus, 415. 
Tomopus, 410, 446. 
T. convexus, 414, 446, 447. 
Venustodus lerdyt, 402. 
Waterford, Limestone at, 539. 
Aystracanthus, 370. 
Xystrovus, 410, 415, 428, 447. 
X. angustus, 414, 449. 
X. egertoni, 450. 
X. pulchellus, 450. 
X. striatus, 414, 448, 449. 
Yorkshire, Mountain Limestone of, 543. 
Zygobates, 490, 491, 492 
Z. marginata, 488. 
