INDEX TO PART II. 



ACERVTJLARIA, 476. 



Acervularia davidsoni, 476. 



profunda, 477. 

 ACROCRINUS, 689. 

 Acrocrinus urnseformis, 690. 

 ACTINOCRINUS, 479, 562. 

 Actinocrinus aequalis, 592. 



bi turbinatus, 616. 



brevicornis, 571. 



brevis, 567. 



coelatus, 585. 



corniculus, 566. 



cornigerus, 576. 



discoideus, 594. 

 gouldi, 613. 



longirostris, 589. 

 lowei, 611. 



minor, 573. 



multiradiatus, 579. 



multibrachiatus, 580. 

 nashvillae, 609. 



ornatus, 583. 

 pentagonus, 579. 



pernodosus, 608 & 617- 



proboscidialis, 584. 



pyramidatus, 565. 

 ramulosus, 615. 



sculptus, 582. 



subaculeatus, 570. 



superlatus, 572. 



symmetricus, 574. 



tricornis, 569. 

 trinodus, 575. 



turbinatus, 587- 



turbinatus, v. elegans, 588. 



nmbrosus, 590. 

 unicornis, 568. 



ventricosus, 595. 



verrucosus, 578, 

 Actinocrinus, S. g. Megistocrinus, 479. 



latus, 480. 

 AGAHICOCRINITES, 560. 



SURVEY.] 



AGARICOCRINUS, 562. 

 Agarieocrinus bullatus, 562. 



stellatus, 564. 



tuberosus, 617. 



whitfieldi, 621. 



wortheni, 619. 



AGASSIZOCRIN0S, 684. 



Agassizocrinns conicus, 687. 



constrictus, 687- 

 dactyliformisj 685. 

 gibbosus, 686. 



AGELACRINUS, 696. 

 Agelacrinus kaskaskiensis, 696. 



AHCHjEOCIDARIS, 697. 



Archaeocidaris agassizi, 698. 

 keokuk, 699. 



norwoodi, 701. 

 shumardana, 699. 



wortheni, 700. 

 ARCHIMEDES, 651. 

 Archimedes reversa, 652. 



wortheni, 651. 



ASTARTELLA , 715. 



Astartclla vera, 715. 

 Athyris incrassata, 600. 



sublamellosa, 702. 



subquadrata, 703. 

 Atrypa aspera, w.occidentalis, 515. 



reticularis, 515. 

 Avicula circulus, 522. 

 Bellerophon nodocarinatus, 723. 



sublasvis, 666. 

 Callopora punctata, 653. 

 Capulus acutirostris, 665. 

 Cardiomorpha ovata, 522. 



rhomboidea, 523. 

 Chonetes fischeri, 517. 



logani, 598. 

 CLADOPORA, 478. 

 Cladopora dichotoma, 478' 

 CYATHOCRINTJS, 622. 

 Cyathocrinus bullatus, 624. 



