604 



COMPARATIVE ANATOMY 



Aiiqihiuridce, 300 

 ^iinpJwracrimts, 307 

 Ampullae, madreporic, 420 



,, tentacle, 430 

 Amjinllaria, 100 



,, [Lunistes), Boltemana, shell, 



161 

 (C'eratodes), chiquitensis, 161 

 ,, crocistotiui, 161 



Grirana, 161 

 ,, pi/rijurect, 161 



,, (Ceratodes), mtvla, 161 



,, '^irainsmii, 161 



Ampi'/lorida:, 6 

 Aiicnchf/fidif:, 293 

 Aiwpta, 466 

 Anaspldw, 10 

 A )ia.fi)w., 21 

 AnafinidiC, 21 

 Anchylosis {Crin. ), 378 

 Aiicida, 13 

 Aiicyloceras stage, 68 

 Ancylus, S 

 Aiikyrodenna, 237 

 Anuulus, 126 

 Anochanus^ 503 



Aiwdonta, 17; circulation, 207; gills, 

 95 ; larva, 264 ; section, 221 

 ,, cijgncm, 34 



Aiiomic, 15; shell, 63 

 Anomiidce, 14- 

 Antedon, 313; embryo and larva, 510, 



534-543 

 Antedon incisa^' 312 ; larva, apical system, 

 318 

 ,, phalanffiinn, young stage, 375 

 ,, rosaceus, 378 

 ,, tuberculosa, 297 

 Antedonidce, 373 

 A/ifhi'iiea, 290 

 Anfheneida; 296 

 Antispadix, 116 

 Aorta, 198, 202 

 Ajiefala, 293 

 Apwci'ijiida^, 310 

 Apiocrinus, 310 

 Aplacoplwra, 3 

 Aplastridce, 110 



Ajjlysia, 10, 78 ; nervous system, 140 

 Aplysidla, 181 

 Aphjsiidce, 10 



Apophyses (Chiton), 39 ; (Echin.), 350 

 Aptychi (Ceph. ), 71 

 Arachnoides, 293 

 Arbacia, 290, 291 

 Arbuciidce, 290 

 Arm, 15 

 ,, barbata, eye, 175 

 ,, N'om, 206 

 Archceocidaridce, 289 

 Archceocidaris { = Jichinocnnns), 2S9 

 Archaster, 296 

 Arckasteridce, 200 



Archiacia, 295 

 Archidoris, 13 

 Architcenioglossa, 5 

 Arcidce, 15 



Arcus (Echinoid. ), 400 

 Argentea (Ceph.), 197 

 Argnnantri, 24, 24 ; gonads, female, 230 ; 

 nervous system, 148 

 ,, argo, male, 243 



Arimi, S 



„ ater, 9 

 Anophanta, 8 

 AHstocystu, 313 

 Aristotle, lantern of, 400-403 

 Articulamentum, 39 

 Articidata, 309 

 Ascocystis, 313 

 Ascoglossa, 11 

 Asiphouiata, 4-^ 

 As^jergUhim (Brechites), 21, 20 



,, dichotoiiium, 66 



Aspidobranchia, 4 



Aspidochirota; 285 ; organisation, 477 

 Aspiidodmdeimi, 290 

 Aspidodiadematidce, 290 

 Aspidosmiia, 295 

 Astartidce, 50 



Asteracanthion glacialis, pedicellariEe, 395 

 ridxiis, madreporic plate, 

 421 

 ,, „ pedicellariffi, 395 



Asterias, 299 



acutispina, 506 

 atlantica, 506 

 ,. calcihiaria, 506 

 capensis, 421 

 micrudiscifs, 506 

 ,, polyplax, 421 

 rubens, 507 

 spirabUis, 503 

 ., sticantha, arm, 396 

 ,, [Stollasterias), volsellata, arm, 



396 

 ,, tenuispina, 421 

 ,, vulgaris, 507 

 Asteriidcc, 299 

 Asterina, S97 



, , gibbosa, circular canal, etc., 425 ; 

 ontogeny, 525-531 

 Wega, 506 

 Asterinidce, 297 

 Asterodiscus, 297 



Asteroidea, 295 - 299 ; alimentary canal, 

 etc., 484; arm, section, 411 ; oj^tic cushion 

 section, 468 ; oral skeleton, 352 ; pedi 

 cellarias, 395 ; stone canal, section, 421 

 ■water vascular system. 463 

 Aster opsis, 297 

 Asthenosovut, 290 



,, urens, spine, 390 ; test, 472 



viscera, 443 

 Astroc/iele, 301 

 Astroclon, 301 



