INDEX 625 



Hamitermes silvestri, 413 



Hamula, 408 



Haplosporidia, 95 



Haplosporidium, 95 ; 20 



H. limnodrili, 21 



Hatschek's pit, 584 



Head, 124; of Arthropoda, 271; of 

 Chaetopoda, 230; of Crustacea*, 

 271, 296, 297, 318, 322, 325, 329, 

 331, 334> 338, 347, 349, 355, 358; 

 of Insecta*, 271, 382, 383, 384, 

 407, 408, 423 ; of Mollusca*, 417, 



476, 477, 481, 485, 494, 498, 513 ; 

 of Myriapoda*, 271 ; 375, 377, 

 379; of Onychophora, 271, 282; 

 of Trilobita, 287, 288 



Head cavity of Chordata, 583 



Head foot, 481 



Head kidney, 251 



Heart, 122; of Arachnida*, 448, 

 450, 458, 462, 467 ; of Arthropoda, 

 279; of Balajioglossus, 588; of 

 Brachiopoda, 540; of Ciona, 596, 

 598; of Crustacea*^, 311, 325, 331, 

 334, 349, 350, 351, 355, 359; of 

 Insecta, 370; of Mollusca*, 471, 



477, 478, 479, 481, 482, 499, 505, 

 518 



Hearts, Branchial, 519; oi Arenicola, 



240 ; of Chaetopoda, 230 ; of Oligo- 



chaeta, 257 

 Heliolites, 163 

 Heliopora, 162, 163 

 Heliosphaera, 76 

 H. inermis, 76 

 Heliozoa, 78 

 Helix, 481 ; 485, 486, 492, 495, 496, 



523 

 H. aspersa, 481 



H. pomatia, 481, 483, 484, 485, 487 

 Helkesimastix, 56 n. 

 Hemiaspis, 445 ; 457 

 H. limuloides, 453 

 Hemichorda, see Enteropneusta 

 Hemimetabola, see Exopterygota 

 Hemimyaria, see Salpida 

 Hefnhnysis, 353 

 Hemiptera, 417 



Hepatic caeca, see Mesenteric caeca 

 Hepatic diverticula, see Mesenteric 



caeca 

 Hepatopancreas, see Digestive gland 

 Heptagonia, Nymphal instars of, 422 

 Hermaea, 495 



Hermaphrodite duct, 486 



Hermaphroditism, of Chaetognatha, 

 544; of Crustacea*, 314, 337, 340, 

 341,343, 357; of Ctenophora, 172; 

 of Hirudinea, 263 ; of Icerya, 394 ; 

 of Mollusca*, 481, 493, 494, 495, 

 507, 510; of Nematoda, 220; of 

 Oligochaeta, 253 ; of Platyhel- 

 minthes, 183; of Polyzoa, 530; of 

 Protodrilus, 261; of Protozoa, 28; 

 of Tunicata*, 596, 600 



Herpetomonas, 58 



Herpyllohius, 337 



Heterocotylea, 191 



Heterodera, 225 ; 226 



Heteronemertini, 209 



Heteronereis, 235; 232, 247 



Heteropoda, 492 



Heteroptera, 418 ; 419 



Heterotricha, 102 



Hexactinellida, 118; 113 



Hexactinian, 164 



Hexamitus, 61 ; 6, 62 



H. intestinalis, 7 



Hexapoda, see Insecta 



Hind gut, see Proctodaeum 



Hinge of Lamellibranchiata, 499 



Hippospongia, 119 



Hirudinea, 263 ; 228 



Hirudo, 267; 263, 264, 265, 266 



Histriobdella, 263 ; 262 



Holectypoida, 571 



Hologametes, 26 



Hologamy, 26 



Holomastigina, 56 



Holometabola, see Endopterygota 



Holophytic nutrition (Photosynthe- 

 sis), 14 n.; I, 39, 40; of Phyto- 

 mastigina*, 14, 36, 40, 41, 43, 44, 

 46, 49; of Protozoa, i, 14 



Holophytic Protozoa, see Holophytic 

 nutrition 



Holothiiria, 572, 573, 575, 576 



H. tiibidosa, 574 



Holothuroidea, 572; 547 



Holotricha, 99 



Holozoic nutrition, 14 n. ; of Phyto- 

 mastigina*, 41, 44, 46, 48, 49; of 

 Protozoa, 14, 37. See also Diges- 

 tion, Feeding 



Holozoic Protozoa, see Holozoic 

 nutrition 



Homarus, 373 



Homoptera, 418; 387, 419 



40 



