INDEX TO PART II. 



Cyathocrinus divaricatus, 554. 



intermedius, 627. 



magister, 628. 



malvaceus, 554. 



pentalobus, 687. 



protuberans, 626. 



rotundatus, 555. 



spuriusj 625. 

 stellatus, 623. 

 tumidus, 624. 



Cypricardella subelliptica, 664. 



nucleata, 663. 

 Cyrtia triquetra, 513. 



umbonata, 512. 

 Dentalium primarium, 666. 



obsoletum, 724. 

 Dichocrinus protuberans, 689. 



simplex, 664. 

 Dolabra? alpina, 716. 

 ECHINOCRINUS, 697- 

 Edmondia? radiata, 716. 

 Euomphalus cyclostomus, 516. 



latus, 605. 



obtusus, 523. 



rugosus, 722. 

 FENESTELLA, S. g. Archimedes, 651. 

 FORBESIOCRINUS, 628. 

 Forbesiocrinus agassizi, 630. 



giddingei, 633. 

 meeki, 631. 



shumardianus, 671. 

 whitfieldi, 632. 



wortheni, 632. 

 GRAPHIOCRINUS, 551. 

 ICHTHYOCRINT;S, 557. 

 Ichthyocrinus burlingtonensis, 557. 



tiaraeformis, 558. 

 Leda bellastriata, 717. 

 Lithostrotion mamillare, 667. 



proliferum, 668. 

 Macrocheilus fusiformis, 718. 



newberryi, 719. 



paludinaeformis, 720. 

 primogenius, 720. 

 yentricosus, 719. 



MEGISTOCRINUS, 479. 



latus (see Actinocrinus, 480. 

 Nucula ventricosa, 716. 

 Orthis inequalis, 490. 



iowensis, 488. 



iowensis, v . furnariug, 489. 



keokuk, 640. 



michelina, v .burlingtonensis, 596. 



pravus, 490. 



robusta, 713. 



Orthis suborbicularis, 486. 



swallovi, 597. 



vanuxemi, 487. 

 PAL^EOCIDARIS, 697. 

 Pentamerus occidentalis, 514. 

 PENTREMITES, 484. 

 Pentremites bipyramidalis, 607. 



cervinus, 690. 



cherokeeus, 691. 



conoideus, 655. 

 globosus, 695. 

 godoni, 692. 



koninckana, 656. 



obesus, 695. 



pyriformis, 693. 



subtruncatus, 485. 



symmetricus, 694. 



wortheni, 606. 

 PLATYCRINUS, 525. 

 Platycrinus canaliculatus, 539. 



cavus, 527. 



discoideus, 535. 



exsertus, 539. 



nodobrachiatus, 542. 

 nodulosus, 541. 



nucleiformis, 540. 



pileiformis, 529. 



planus, 533. 

 pocilliformis, 528. 

 saffordi, 634. 

 sarae, 673. 



sculptus, 536. 

 shumardianus, 532. 



subspinosus, 536. 



tuberosus, 534. 



truncatulus, 528. 



truncatus, 537. 

 wortheni, 530. 



Pleurotomaria sphaerulata, 722. 

 tabula ta, 721. 



wortheni, 664. 

 POTERIOCRINUS, S.g.Scaphiocrinus,549. 

 Poteriocrinus calyculus, 553. 



missouriensis, 669. 

 Productus arcuatus, 518. 



concentricus, 517. 



costatus, 712. 



dissimilis, 497. 



flemingi, v, burlingtonensis, 598, 



marginicinctus, 674. 

 mesialis, 636. 

 ovatus, 674. 

 pyxidatus, 498. 



semireticulatus, 637. 



setigerus, 638. 



