658 



INDEX OF SUBJECTS. 



gonotheca, 86 

 green-gland, 383 

 gymnoblastic, 87 



Haemocyanin, 278, 377, 439 



haemoglobin, 377, 538 



haemolymph, 206 



halteres, 520 



head-kidney, 214, 223 



heart — Amphlneura, 289; Arachnida, 

 437; Cephalopoda, 346; Crustacea, 

 376; Gasteropoda, 298; Pelecypoda, 

 332 ; Pycnogonida, 465; Tracheata, 

 470 ; Urochorda, 621 ; Xiphosura, 

 429 



Hectocotylus, 356 



hemimetabolic insects, 500 



hermaphroditism, 44 



heterogony, 60, 148, 498 



histolysis, 456 



holometabolic insects, 500 



hook-gland, 462 



hydranth. 79 



hydrocaulus, 79 



hydrocoel, 535 



hydrorhiza, 79 



hydrotheca, 79 



hypermetamorphosis, 513 



hypodermis, 174 



hypophysis cerebri, 615, 623 



hypostome, 79 



Imago, 500 

 immigration, 55 

 individuality, 41 

 ink-bag, 349 



intertentacular organ, 260 

 invagination, 54 



Karyokinesis, 9 

 Keber's organ, 337 



Lacunar system, 538 



languets, 622 



lateral -line organs, 210, 233 



Laurer's canal, 146 



lemnisci, 181 



Leucon, 71 



linin, 6 

 liver, 614 



lophophore, 247, 254 

 lung- books, 436, 457 



Madreporiform tubercle, 536 



madreporite, 536 ' 



malpighian tubules — Amphipoda, 

 417; Arachnida, 437; Tracheata, 

 474 



mantle, 268, 376, 621 



manubrium, 81 



mastax, 191 



Medusa, 77, 80; Craspedote, 81; 

 Gymuophthalmatous, 83 ; Ocel- 

 late, 83, 89; Vesiculate, 83 



megaloesthetes, 393 



Megalopa, 433 



mesendoderm, 68, 132 



mesenterial filaments, 99, 105 



mesentery, 57, 104, 179, 187, 306, 270 



mesoblasts, 57, 214, 235, 237 



mesoderm, 56 



mesoglcea, 68 



mesopodium, 296 



mesothorax, 488 



metagenesis, 60 



metamere, 41 



metamerism, 43 



metamorphosis of insects, 499 



Meianauplius, 418 



metapodium, 296 



metathorax, 488 



Metazoea, 421 



micrsesthetes, 292 



micronucleus, 35, 37 



microsomes, 4 



mitosis, 9 



Morren's gland, 220 



Milller's larva, 141 



muscular system — Acanthocephala, 

 180; Amphineura, 286, 389; Antho- 

 zoa, 166; Brachiopoda, 370; Cepha- 

 lochorda, 610 ; Cephalopoda, 348; 

 Cestoda, 154 ; Chsetognatha, 187 ; 

 Chaetopoda, 305, 219; Crustacea, 

 375; DinopMlus, 198 ; Echinodera, 

 185; Echinoderma, 535; Gasteropo- 



