514 



MOLLUSCA — BRACHIOPODA 



Ampelita, 335, 442 



Amphibola, 10, 18, 4S9 ; breathing, 

 151; radula, 236 



Amphihulimus, 352, 44^', radula, 233 



Amphidoxa, 358 



Amphidromus, 301, 305, 317, 310, 359, 

 442 ; radula, 233 



Ainphineura, 8, 40O ; breathing organs, 

 154, 168 ; nervous system, 303 ; geni- 

 talia, 145 



Amphipeplea, 4^9 



Amphiperas, 419 



Amphisphyra^ 430 



A^nphissa, 42S 



Amphitretus^ 383 



Ampullaria, 17, 4I6 ; self-burial, 42 ; 

 spawn, 125 ; breathing organs, 151, 

 158 ; jaws, 212; shell, 249, 263 ; oper- 

 culum, 268 ; distribution, 294, 320, 

 322, 343, 359 



Ampullarina, 302, 439 



Ampullina, 4II 



Ainussium, 450 



Amijcla, 423 



Anahathron, 415 



Anachis, 423 



Anadenus, 24, 44I 



Anal glands, 241 



Anal siphon, 164, 173 



Anastomopsis, 442 



Anatiiia, 274, 275, 459 



Anatinacea, 458 ; gills, 167 



Anaulus, 414 



AncMstoma, 293, 296 



Ancilla, 267, 426 



Ancillina, 426 



Ancistrochirus, 391 



Ancistromesus, 405 



Ancistroteuthis, 391 



Ancula, 434 ; radula, 229, 230 ; warn- 

 ing coloration, 72 



Anculotus, 417 



Ancyloceras, 247, 399 



Ancylus, 19, 439 ; breathing, 162 ; 

 hibernating, 27 ; radula, 235 



Aneitea, 325, 443 



Angitrema, 340, 417 



Anisocardia, 451 



Anodonta, 259, 341, 452 ; shower of, 47; 

 variation, 92 ; Glochidium, 147 ; gill, 

 167 ; otocyst, 197 ; nervous system, 

 206 ; hinge, 274 ; A. anatina, 24 ; dis- 

 tribution, 282 



Anodontopsis, 451 



Anoglypta, 325, 44I 



Anomia, 257, 448, 464 ; intestine, 241 ; 

 byssus hole, 262 ; hearing, 196 



Anomiacea, 44s 



Anoplophora, 451 



Anostoma, 248, 266, 356, 358, 442] 

 aperture, 63 



Anthracosia, 451 



Anura, 424 



Anus, 209, 241 



Apera, 334, 440 



Aperostoma, 344, 414 



Aphanotrochus, 4O8 



Aphelodoris, radula, 230 



Apicalia, 422 



Aplacophora, 9, 404 ; radula. 228 



Aplecta, 354, 439 



Aplustrum, 245, 428, 430 ; radula, 230 



Aplysia, 245, 428, 431 ; stomach, 239 ; 

 purple fluid, 65 



Aplysioidea, 430 



Aporrhais, 4I8 ; radula, 215 



Apricardia^ 455 



Aptychus, 397 



Aptyxiella, ^i7 



Aptyxis, 424 



Aral Sea, Limnaea from near, 84 ; 

 Cardium from, 91 



Area, 14, 171, 273, 448; eyes, 191 



Arcacea, 448 



Arcachon, oyster-parks at, 105 



Arcestes, 397 



Archidoris, 434, 434 ; protective colora- 

 tion, 73 



Architeuthis, 378, 390, 390 ; sucker, 381 



Arcomya, 458 



Arconaia, 307, 452 



Arctic shells, colour of, 86 



Arcuella, 422 



Argiope, 470, 472, 479, 487; parasite 

 of, 485 ; distribution, 486 ; fossil, 

 501, 506, 508 



Argiopidae, 506, 508 



Argohuccinum, 4^0 



Argonauta, 383, 383 ; egg-laying, 127; 

 hectocotylised arm, 137; radula, 236 



Arinia, 413 



Ariolimax, 44I, 341, radula, 233 



Arion, 440 ; shell, 175, 245, 246 ; hardier 

 than Helix, 24 ; voracity, 30 f.; egg- 

 laying, 42 f.; protective coloration, 

 70 ; pulmonary orifice, 160 ; food, 

 179 ; smell, 193 f. ; radula, 233 ; dis- 

 tribution, 285 



Arionta, 341, 353, 441 



Ariophanta, 301, 308, 309, 316, 44O; 

 protective coloration, 70 



Aristotle, on modified arm of polypus, 

 138 



Artemis, 454 



Arthur ia, 403 



Asaphis, 456 



Ascoceras, 394 



Ascoglossa, 11 n., 431 



Ashford, C, on pulsations of heart in 

 Helix, 26 ; on homing of Helix, 35 ; 

 on dart-sac, 143 



Asoleiie, 4I6 



Aspergillum, 202, 459 



Aspidelus, 329, 440 



