! i 



INDEX, 



GENERAL INTRODUCTION AND INVERTEBRATA. 



Abyssal clay, 74. 

 Aca7itharia, 145, 146, 147. 

 Acantherpestes , 584. 

 Acanthoceras, 867, 868. 

 Acanthochonia, 173, 1564. 

 Acanthocladia, 628. 

 AcanthocladidcB, 627. 

 Acanthofnetra, 146. 

 Acantlioraphis, 163. 

 Acanthotelsou, 561. 

 Acanthoteuthis, 881. 

 Acarida, 575. 

 Acasta, 499. 

 Acentotremites , 464. 

 Aceruularia, 269, 273, 286, 287. 

 Achatina, 812. 

 Achistrum, 406, 407. 

 Acicula, 786. 

 AciculidcB, 786. 

 Acidaspidce, 540. 

 Acidaspis, 539, 540. 

 Acm<za, 762. 

 Acorn-shells, 496, 497. 

 Acraspeda, 206. 

 AcrididcB, 597. 

 Acrocidaris, 382. 

 Acroculia, 764. 

 Acrosalenia, 380. 

 Acrothele, 652. 

 Aero tret a, 651, 652, 

 Acroura, 403. 

 ActcBon, 801. 

 Actceonella, 801. 

 ActcsonidcB, 800. 

 Actceonina, 801. 

 Actinacis, 310. 

 Actiniaria, 261, 263. 

 Actinidce, 261. 

 Actinoceras, 839, 840. 

 Actinoceratidce , 839. 

 Actinocrinidce, 425. 



Actinocrinns, 426. 

 Actinocystis, 286. 

 Actinodo?ita, 717. 

 Actinometra, 412, 443. 

 Actino?7ima, 149. 

 Actinostoma, 626. 

 Acti?iostroma, 2.^2., 233. 

 Actitiozoa, 240. 

 Adacna, 728. 

 Adelarthrosomata, 577. 

 Adelphoceras, 844. 

 Adesmacea, 744. 

 ALchmina, 508. 

 s£ger, 563. 

 ALgi?iidce, 206. 

 s^gites, 559. 

 sSghna, 536, 537. 

 sEglinidce, 537. 

 sEgoceras, 864. 

 sEgoceratidce, 864. 

 Agaricocrinus , 426. 

 Agassizocrinus, 436, 437. 

 AgelacrinidcB, 452. 

 Agelacri?ius , 452, 453. 

 Agnostidce, 545. 

 Agnoslus, 545. 

 Alaria, 789. 

 Alcyo?iacea, 326. 

 Alcyonaria, 256, 324. 

 Alcyonidce, 326, 327. 

 Alcyonium, 326. 

 Alecto, 6x6. 

 Alectryonia, 695, 696. 

 Allagecrmus, 432. 

 Allionia, 443. 

 Allomorphina, 131. 

 Allopora, 225, 226, 227. 

 Allorisma, 749, 750. 

 Alveolaria, 620. 

 Alveolina, 126. 

 Alveolites, 315, 316. 



