INDEX 



669 



of Schizotncha socialis, 152 ; of Stentor, 

 154; of Vorticellidae, 158 ; fertilising iu 

 Chlamydomonas, 125 



Tube-foot, 428 ; of Asterias rubens, 441 f . ; 

 oi Hchinus esculentiis, 517 f. ; of Endo- 

 cyclica, 532 ; of Arbaciidae, 532 ; of 

 Cidaridae, 532 ; of Diadematidae, 532 ; 

 of Echinothuriidae, 532 ; of Echino- 

 cardium cordatum, 551 ; of Echina- 

 rachnius parma, 545, 546, 547 ; of 

 Palaeodiscus, 557 ; of Holothuria nigra, 

 561 



Tubipora, 329, 336, 343, 344 ; T. musica, 

 338, 343 



Tubiporidae, 344 



Tnbularia, 268, 271 ; T. larynx, 263 ; T. 

 2)arasitica, 268 



Tubulariidae, 271 



Tumour, malignant, associated with Ley- 

 denia, 91 



Tunicata, 621 



Tuning-fork, 192, 193 



Turbellaria, fresh-water, distribution of, 48 ; 

 symbiotic with Zoocklovdla, 126 



Turhinaria, 396 



Turhinolia, 399 



Turbinoliidae, 39S 



Tumtopsis, 273, 295 



Tuscarora, 79, 85 



Tylostyle (a style iu which a knob sur- 

 rounds the origiu), 224 



Tylote, 183, 224 



Tylotoxea (a rhabdus of which one actiue 

 is tylote or knobbed, the other oxeate, 

 the latter directed towards the surface of 

 the Sponge), 224 



Tyrosin, 15 



Uexkiill, on function of pedicellariae of 

 Echinus, 508 ; on physiology of nervous 

 system of Echinoidea, 519 ; on vision of 

 Echiuoidea, 522 ; on resjjiratory function 

 of Aristotle's lantern, 527 ; on pedi- 

 cellariae of Sjjhaerechinus, 541 



Uintacrinus, 588 



Ulmaridae, 324 



Ulmaris, 314, 324 ; U. prototypus, 315, 

 324 



Umbdlula, 331, 359, 360, 363 ; U. gracilis, 

 359 



Umbellulidae, 362 



Umbrella of Medusae, 251 



Uncinataria, 203 

 •Under arm-plate of Ophiuroidea, 491 



Under basal-plate of Criuoidea — see Infra- 

 basal jdate 



Undulating membrane, of Flagellata, 111, 

 115, 123 ; of Trypanosoma, 121 ; of 

 JJinenyiiipha, 123 ; of S/.i/lonychia my- 

 tilus, 139 f. ; of Ciliata Trichostomata, 

 137 f., 145; of Glaucoma, 153; of 

 Fleuronema chrysalis, 153, 154 ; of 



Caenomorpha v.niserialis, 165 ; of Vorti- 



cella, 156, 157 

 Unequal fission in Sjnrochona, 147 

 Upper arm-plate, of Ophiuroidea, 491 ; of 



Ophiutercsis, 491 ; absent in C'lado- 



phiurae, 491, 500 

 Urechinidae, 554 n. 

 Urine, 13 



Urocodrum, 137, 141 n. 

 Uronema, 137, 141 n. 

 Urticina, 379, 3S2 ; U. crnssicornis, 379, 



382 

 Ussov, 257 11. 

 Utc, 189, 190, 192, 221 



Vacuole, 5 f. ; of Collozonm inerme, 76 ; of 

 Oikomonas, 112 ; contractile or pulsatile, 

 14 f. — see Contractile vacuole ; forma- 

 tive, 14 f. — see Alveole, Food-vacuole, 

 Formative vacuole, Iuge>tion, vacuole of 



Vaginicola, 138, 158 



Valvata, 461, 471 f. 



Valvate, pedicellariae, of Antheneidae, 

 456, 471 



Vawpyrella, 89 



Vaney, 292 n. 



Variatiou in character of Foraminiferal 

 shell at different stages of growtli, 66 



Vegetative, growth, in coloured Flagellates, 

 115 ; rest, 37 



Velata, 46I, 464 f., 466 



Velella, 301, 302, 309 ; V. spiraas, 304 



Veley, Lilian, on Pelomyxa, 53 u. 



Ventriculites, 208, 208 



Venus's Flower - basket ( = Euplectella 

 asjjergillum), 197 



Venus's girdle, 420 



Veretilleae, S64 



Veretillum, 364 



Vermicles, of GauJe, a name for Lankester- 

 ella, 102 



Verrucae, 331 



Verrucella, 357 ; V. gundcdoupensis, 357 



Vertebra, of Ophiuroidea, 481, 491 ; of 

 Streptophiurae, 491, 494 ; of Ophio- 

 tertsis, 481, 491 ; of Ophiohdus, 491, 

 493 ; of Zygophiurae, 491 ; oi Oph iothrix 

 frugilis, 480 ; of Ojihiarachna, 481 ; of 

 Cladophiurae, 491, 500 ; of Astroschema, 

 481 ; of Gorgonocephal us, 491 ; of Astro- 

 phyton, 491 ; of fossil Ophiuroidea, 501, 

 502 



Vertebrates, cold-blooded, hosts of Haemo- 

 sporidae, 102 



Verticilladeae, "363 



Verworn, on general physiology and proto- 

 plasm, 3 n. ; on protoplasmic movements, 

 16 n., 17 ; on regeneration, 35 n. ; of 

 Thalassicolla nudeata, 79 n. 



Vesicular nucleus, 25 



Vestilmle, of Peritrichaceae, 145 ; of Car- 

 chesium, 146; of Vor/icdla, 156, 167 



