INDEX. 



Every reference is to the page. In some cases the upper and lower 

 half of the page is indicated by a small [number, l or 2 , placed above the 

 number of the page. Figures in black type refer to the systematic 

 position. 



Abaetinal 1 17. 



Abalius 810 '. 



Abdomen, Crustacea 

 342. 



Abdominal bud 35. 



Abh. Senck. Ges. Frank- 

 furt = Abhandlungen 

 herausgegeben von 

 der Senckenbergischen 

 naturforschemlen Ges- 

 ellschaf t ( Frankfort 

 a -m.) 



Aboral sinus. Asteroids 

 181, Echinoids 231, 

 development of 145, 

 146. 



Abyssascidia 27-. 



Acalyptratae 749 2 . 



Acalvptrate 749 2 . 



Acatithaster 192'-. 

 'mad re] writes of 184. 



Acanthechinus 241 '. 



Acanthephyra 531 -. 



Acanthia, nervous sys- 

 tem 634. 



Acanthocarpus 544 '. 



Acanthocope 488 ! . 



Acanthoctenus 820 -. 



Acanthocyclus 548 2 . 



Acanthodon 819. 



Acantholeberis 381 -. 



Acantholithus 541 -. 



Acantholophns 842 '. 



Acanthomera 747 l . 



Acanthonotus 501 '. 



Acanthophrynus 810 2 . 



Acanthosoma 692 ', stage 

 529 2 . 



Acanthotelson 358 2 , 

 462, 463. 



Acanthotrochus 269 2 . 



Acarina 842. 



Z III 



| Acaromantis 851 2 . 

 I Acartia 405 2 . 

 I Acasta425 2 . 



Areste 247. 



Acetes 529 2 . 



Achaeus 545 2 , parasite 

 of 49 1 1 . 



Achelia 784. 



Acherontia 715. 



Acheta 636, 674 2 . 



Achlyonice 267 2 . 



Achtheres 409 2 , deve- 

 lopment 402. 



Acicle 539 1 . 



Acidostoma 501 l . 



Aoraeinae 712 2 . 



Acridium 672 1 , leg 621, 

 tympanic organ 635. 



Acrocalanus 404. 



Acrocera 748 * 



Acrochordocrinus 298 2 . 



Acrocidaris 240 2 . 



Acron 319, 325, 326, 

 609. 



Acroperus 381 2 . 



Acrosalenia 240 2 . 



Acrothoracica 426, 



affinities of 427 J . 



Actaeomorpha 544 2 . 



Actinal 117. 



Actinocrinus 296 2 . 



Actinocucumis 269 l . 



Actinometra 301 x , am- 

 bulacral groove 271, 

 intestine 285, mouth 

 and anus 270. 



Actinopoda 265. 



Ac tin opus 819. 

 I Aculeata 762. 



Adambulacral ossicles 

 169. 



Adela 707 2 . 



Adephaga 725. 



Adimerus 730 2 . 



Admetus 808, 810 2 . 



Adonea 820 2 . 



Adranesius 406 2 . 



Aebutina 820 1 . 



Aedes 744 2 . 



Aega 489 2 . 



Aegathoa 489 2 . 



Aegialitidae 732 2 . 



Aegina 504 1 . 



Aeglea 541 2 . 



Aenippe 405 2 . 



Aeolothrips 689. 



Aepophilidae 693 2 . 



Aerope 247. 



Aeschna 688, eye of 331 



Aethon 408 2 . 



Aetidius 405 1 . 



Affinities Arthropoda 

 315,Crinoids290,291, 

 Echinoderms 160, 

 Echinoids 235, Holo- 

 thurians 265, Trilo- 

 bita 366, Phyllopoda 

 367. 



Agalia 697 2 . 



Agaricocrinus 296 2 . 



Agaristidae 71 8 2 . 



Agassizia 246 2 . 



Agassizocrinus 295. 



Agaue851 2 . 



Agdistis 720 1 . 



Agelacrinus 310. 



Agelena 825 l . 



Ageronia 712 2 . 



Aglaia 391. 



Aglossa 720 1 . 



Aglycyderes 736 2 



Agnostus 363. 



Agrion 688 2 . 



Agriotes 732 2 . 



3 K 



