704 



INDEX 



Head, 144; of Arthropoda, 308, 309; 

 of Chaetopoda, 263 ; of Crustacea*, 

 308, 309, 332, 334, 356, 360, 362, 

 364, 368, 370, 372, 377, 387, 389, 

 395> 400; of Insecta*, 308, 425, 

 463; of Mollusca*, 544, 549, 550, 

 555, 559, 567, 572, 589; of Myria- 

 poda*, 308, 418, 420, 422; of 

 Onychophora, 308, 309, 318; of 

 Trilobita, 323, 324 



Head cavity of Chordata, 660 



Head foot, 555, 589, 603 



Head kidney, 284 



Heart, 132; of Arachnida*, 520, 522, 

 530, 534, 539; of Arthropoda, 314; 

 of Balanoglossus , 667 ; of Brachio- 

 poda, 616; of Ciona, 674, 677; of 

 Crustacea*, 348, 363, 364, 370, 



373, 390, 391, 392, 397, 401; of 

 Insecta, 437; of Mollusca*, 544, 

 550, 551, 553, 554, 556, 572, 579, 

 593 



Hearts, Branchial, 594; oi Arenicola, 

 275 ; of Chaetopoda, 263 ; of 

 Oligochaeta, 291 



Heat, 4 



Hectocotylus, 598 



Heliolites, 186 



Heliopora, 186, 186 



Heliosphaera, 81 ; inermis, 81 



Heliozoa, 83 



Helix, 554; 559, 599; aspersa, 554; 

 pomatia, 554, 557, 558, 559, 560 



Helkesimastix, 59 n. 



Hemiaspis, 517; 529; limuloides, 525 



Hemichorda, 662; 628, 660, 661 



Hemimetabola, 454 



Hemimyaria, see Salpida 



Hemimysis, 394 



Hemiptera, 474; 454, 475, 477, 478 



Hepatic caeca, diverticula, see Mesen- 

 teric caeca 



Hepatopancreas, see Digestive gland 



Hepialidae, 490 



Hepialus huniuli, 490 



Heptagenia, Nymphal instars of, 482 



Hermaea, 569 



Hermaphrodite duct, 560 



Hermaphroditism, of Chaetognatha, 

 619-20; of Crustacea*, 351, 376, 

 379, 381, 382, 398; of Ctenophora, 

 196 ; of Gastrotricha, 243 ; of Hiru- 

 dinea, 296 ; of Icerya, 446 ; of 

 Mollusca*, 555, 567, 582, 585; of 



Nematoda, 250; of Oligochaeta, 

 286; of Platyhelminthes, 208; of 

 Polyzoa, 606 ; of Protodrilus, 295 ; 

 of Protozoa, 33 ; of Tunicata*, 674, 

 679, See also Mutual fertilization 



Herpetomonas, 64 



Herpyllobius, 376 



Heterocotylea, 218 



Heterodera, 253 ; 256 



Heterometabola, see Exopterygota 



Heteronemertini, 237 



Heteronereis, 268 ; 265, 280, 280 



Heteroneura, 491 



Heteropoda, 566 



Heteroptera, 475 



Heterotricha, 109 



Hexactinellida, 126; 123 



Hexactinian, 187 



Hexamitus, 66; 10; intestinalis, il 



Hexapoda, see Insecta 



Hind gut, see Proctodaeum 



Hinge of Lamellibranchiata, 573 



Hippospongia, 127 



Hirudinea, 296; 260 



Hirudo, 301 ; 297, 297, 298, 299, 300 



Histriobdella, 296 ; 295 



Holectypoida, 647 



Hologametes, 31 



Hologamy, 3 1 ; 6 



Holomastigina, 60 



Plolometabola, see Endopterygota 



Holophytic nutrition (Photosyn- 

 thesis), 18-19 n.; I, 44, 45 5 of 

 Phytomastigina*, 18, 40, 46, 48, 

 49, 52, 54; of Protozoa, i, 18, 44 



Holophytic Protozoa, see Holophytic 

 nutrition 



Holothuria, 648, 652, 653; tubulosa, 

 651 



Holothuroidea, 648; 623, 649, 653 



Holotricha, 106 



Holozoic nutrition, T8-i9n.; of 

 Phytomastigina*, 46, 49, 52, 54; 

 of Protozoa, 18, 42; of Zoomasti- 

 gina, 46. See also Digestion, 

 Feeding 



Holozoic Protozoa, see Holozoic nu- 

 trition 



Homarus, 415 



Homoneura, 490 



Homoptera, 475 ; 431, 476 



Hood of Tetrabranchiata, 603 



Hoplocampa testudinea, 497 



Hoplocarida, see Stomatopoda 



