642 INDEX 



Subchelate limbs, 350, 359, 372, 443, 

 458 



Subdermal cavities, 113 



Subgenital pits, 152 



Subimago, 420 



Subneural gland of Timicata, 592 



Suboesophageal ganglion, see Gan- 

 glion, Suboesophageal 



Subtentacular canals, 580 



Subumbral pit, 152 



Subumbrellar cavity, 135, 138 



Subumbrellar ectoderm, of Medusa, 

 135 ; of trochosphere, 250 



Subumbrellar musculature, 135 



Suctoria, 107; 4, 15 



Sulcus, 48 



Summer eggs of Cladocera, 329; of 

 Mesostomum, 188 



Superlinguae, 407 



Supero-marginal ossicles, 558 



Superposition image, 278 



Supraoesophageal ganglia, see Gan- 

 glion, Cerebral 



Surface, of Ciliata, 98 ; of Protozoa, 

 8, 16. See also Ectoplasm 



Suture line of ammonoid shell, 



529 



Swarm spores, 33 



Swarming of Polychaeta, 246 



Sycon, 117; 112, 113 



S. raphanus, 119 



Sycon grade, 113 



53;///^?, 235; 231, 233, 245 



S. ramosa, 246 ; 245 



Symbiosis, 38, 42, 46, 48, 104, 170, 

 188,413 



Symmetry, 123, 557; of Actinozoa, 

 159; of Echinodermata, 547, 548, 

 557; of Metazoa, 124; of Protozoa, 

 4. See also Bilateral symmetry, 

 Radial symmetry 



Sympathetic system, of Crustacea, 

 305; of Insecta, 398 



Symplasts, 6 



Synagoga, 347 



S. mira, 347 



Synalpheus, 346 



Synapta, sii; 573, 57^ 



Synaptida, 577 



Syncarida, 351 ; 349 



Syncytia, 6, 93, 95. See also Plas- 

 modia 



Syngamy, 26; 32; of Ciliophora*, 

 26 n., 28, 29, 30, 100, 107, 108; 



of Dinoflagellata, 49 ; of Mastigo- 

 phora, 40; of Sarcodina*, 68, 75 

 78, 79, 82; of Sporozoa*, 83, 85, 

 86, 88, 89, 90, 93 ; of Volvocina*, 

 26, 40, 50, 52 ; of Zoomastigina, 56 



Syracosphaera, 46 



S. pulchra, 45 



Syringopora, 163 



Syzygy, 83 and n.; 85, 88, 89, 90 



Tahanus, 436 



Tachardia lacca, 420 



Tactile organs, see Sense organs 



Taenia, 198, 204 



T. coenurus, 202 



T. echinococcus, 202 



T. serrata, 202 



T. solium, 200, 201 



Taenioglossa, 490 



Tae?iiothrips inconsequens, 424 



Tagmata, 271; of Crustacea, 296, 

 333, 349- 'S'ee also Abdomen, 

 Cephalothorax, Head, Mesosoma, 

 Metasoma,Opisthosoma,Prosoma, ■ 

 Pygidium, Thorax, Trunk 1 



Tail, 585 ; 545 ; of Chaetognatha, 542, 

 544, 545 ; of Chordata, 585 ; of 

 Tunicata, 597, 598, 600, 606 



Tail fan, 348; 351, 352, 357, 362 



Tanaidacea, 354 



Tanais, 354 



Tardigrada, 467 



Tarsus, 385 ; 408, 424, 441 



Tealia, 170 



Tectibranchiata, 494 



Teeth, of Echinoidea, 567 ; of Ophiu- 

 roidea, 564 



Tegenaria guyonii, 460 



Tegmen, 579 



Tegmentum, 475 



Tegmina, 409 



Telosporidia, 82 ; Reduction division 

 of, 23, 32 



Telson, 295 ; 290, 292-3 ; of Arach- 

 nida, 445, 452 ; of Crustacea*, 295, 

 320, 324, 332, 347, 351, 355, 358; 

 oi Lithobius, 378 



Teninocephala , 190 



T. nii?ior, 191 | 



Temnocephalea, 190 1 



Tentacles, of Actinozoa, 157, 158, 

 163; of Ciona, 592; of Coelen- 

 terate polyp and medusa, 129, 

 130, 131, see also Tentaculocysts ; 



