INDEX. 



1577 



Cyclostoma, 786. 

 Cyclostomidce , 786. 

 Cyclus, 550. 

 Cylichna, 8oi, 802. 

 Cylindrites, 801. 

 Cylindrophyma, 167. 

 Cymbulia, 804, 806. 

 Cymbuliidce, 806. 

 Cypellia, 174. 

 Cyphaspis, 542. 

 Cyphosoma, 382. 

 Cyprcea, 790, 791. 

 Cy presides, 790. 

 Cyprella, 508. 

 Cypricardella, 725. 

 Cypricardia, 736. 

 Cypricardinia, 736. 

 Cyprides, 508. 

 Cypridella, 508. 

 Cypridellina, 508. 

 Cypridina, 507, 508. 

 Cypridinides, 507. 

 Cyprina, 736. 

 Cyprinides, 736. 

 Cypris, 507, 508. 

 Cyrena, 738. 

 Cyrenides, 738. 

 Cyrtia, 665, 666. 

 Cyrtina, 665, 666. 

 Cyrtoceratides, 843. 

 Cyrtoceras, 843. 

 Cyrtocerina, 839. 

 Cyrtodaria, 743. 

 Cyrtodonta, 714, 715. 

 Cyrtograptus, 215. 

 Cyrtolites, 769. 

 Cystiphy Hides, 298. 

 Cystiphy lloidea, 298. 

 Cystiphy Hum, 299. 

 Cystocidarides, 373, 374. 

 Cystocidaris, 373, 374. 

 Cystodictya, 631. 

 Cystodictyo?iid<z, 631. 

 Cystoidea, 447, 1566. 

 Cy there, 507, 509. 

 Cytherea, yyj. 

 Cythereis, 509. 

 Cytherella, 508. 

 Cytherellides, 508. 

 Cytherellina, 508. 

 Cytherides, 509. 

 Cytheridea, 509. 



Dakota Beds of North America, 45. 



Dalmania, 542. 



Dalmanites, 541, 542. 



Daonella, 706, 707. 



Dasmia, 266. 



Davidsonella, 678. 



Davidsonia, 663. 



Dawsonella, 778. 



Dawsonia, 214. 



Day ia, 669. 



Decapoda (Crustacea), 562 ; {Cephalopoda), 



874. 

 Deep-sea Muds, 74. 



Defrancia, 619. 



Deiphon, 537, 538. 



Dekayia, 349, 356. 



Delphinula, 775. 



Dendrocrinus, 435. 



Dendrograptzis, 203, 204. 



Deftdrophyllia, 306, 308. 



Dendropupa, 813. 



Dentaliidce, 819. 



De?itali?ia, 131. 



Dentalium, 819. 



Derivative rocks, 13. 



Deshayesia, 779. 



Desmoceras, 865. 



Diadema, 381. 



Diadematidce, 381. 



Dianulites, 356. 



Diastoma, 781. 



Diastopora, 617, 618. 



Diastoporella, 618. 



Diastoporidce, 617. 



Diatom-earth, 33, 1490. 



Diblasus, 267. 



Dibranchiate Cephalopods, 871. 



Dibunophylhim, 291, 292. 



Dicellograptus, 217. 



Dicer as, 731. 



Dichocrinus, 428. 



Dichograptidce, 216. 



Dichograptus , 217, 218. 



Dicranograptidce , 217. 



Dicranograptus , 217, 219. 



Dictyocha, 147, 148. 



Dictyomitra, 148, 149. 



Dictyoiiema, 204, 205. 



Dictyo7ieura, 594. 



Dictyonina, 168. 



Dictyophyton, 173. 



Didymocyrtis, 149. 



Didymograptus, 2.16. 



Dikellocephalus , 521, 530, 531. 



Dimerella, 670. 



Pimorphograptus, 211, 219. 



Dimyary Bivalves, 688. 



Dindymene, 539. 



Dindymenidcs, 539. 



Dinobolus, 655. 



Dionide, 544. 



Diphyphyllum, 287. 



Diplocidaris , 379. 



Diplodonta, 746, 747. 



DiplograptidcE, 218. 



Diplograptus , 218, 220. 



Diploria, 272. 



Diplostylus, 562. 



Diplotrypa, 355. 



Diprionidian Graptolites, 214, 21S 



Diptera, 599. 



Discina, 652, 653. 



Disci7iid<z, 652. 



Discinisca, 653. 



Discites, 846. 



Discinocaris, 513, 515. 



Discoceras, 844. 



Discodermia, 165, 168. 



Discohelix, jj2,. 



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