INDEX 



669 



of Schizotricha socialis, 152 ; of Stentor, 

 154; ofVorticellidae, 158 ; fertilising in 

 Chlamydomonas, 125 



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

 of Echinus esculentus, 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 parvia, 545, 546, 547 ; of 

 Palaeodiscus, 557 ; of Holothuria nigra, 

 561 



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

 338, 343 



Tubiporidae, 344 



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

 parasitica, 268 



Tubulariidae, 271 



Tumour, malignant, associated with Ley- 

 denia, 91 



Tunicata, 621 



Tuning-fork, 192, 193 



Turbellaria, fresh-water, distribution of, 48 ; 

 symbiotic with Zoochlorella, 126 



Turbinaria, 396 



Turln&olia, 399 



Turbinoliidae, 398 



Turritopsis, 273, 295 



Tuscarora, 79, 85 



Tylostyle (a style in which a knob sur- 



' rounds the origin), 224 



Tylote, 183, 224 



Tylotoxea (a rhabdus of which one actine 

 is tylote or knobbed, the other oxeate, 

 the latter directed towards the surface of 

 the Sponge), 224 



Ty rosin, 15 



Uexkull, on function of pedicellariae of 

 Echinus, 508 ; on physiology of nervous 

 system of Echinoidea, 519 ; on vision of 

 Echinoidea, 522 ; on respiratory function 

 of Aristotle's lantern, 527 ; on pedi- 

 cellariae of Sphaer echinus, 541 



Uintacrinus, 588 



Ulmaridae, 324 



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

 324 



Umbellula, 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 Crinoidea see Infra- 

 basal plate 



Undulating membrane, of Flagellata, 111, 

 115, 123 ; of Trypanosoma, 121 ; of 

 Dinenympha, 123 ; of Stylonychia my- 

 tilus, 139 f. ; of Ciliata Trichostomata, 

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

 Pleuronema chrysalis, 153, 154 ; of 



Caenomorpha uniserialis, 155 ; of Vorti- 



cella, 156, 157 

 Unequal fission in Spirochona, 147 

 Upper arm -plate, of Ophiuroidea, 491 ; of 



Ophioteresis, 491 ; absent in Clado- 



phiurae, 491, 500 

 Urechinidae, 55 If. n. 

 Urine, 13 



Urocentrum, 137, 141 n. 

 Uronema, 137, 141 n. 

 Vrticina, 379, 382 ; U. crassicornis, 379, 



382 

 Ussov, 257 n. 

 Ute, 189, 190, 192, 221 



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

 Oikomo7ias, 112 ; contractile or pulsatile, 

 14 f. see Contractile vacuole ; forma- 

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

 Formative vacuole, Ingestion, vacuole of 



Vaginicola, 138, 158 



Valvata, 461, 471 f. 



Valvate, pedicellariae, of Antheneidae, 

 456, 471 



Vampyrella, 89 



Vaney, 292 n. 



Variation in character of Foraminiferal 

 shell at different stages of growth, 66 



Vegetative, growth, in coloured Flagellates, 

 115 ; rest, 37 



Velata, 46 1, 464 t, 466 



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



Veley, Lilian, on Pelomyxa, 53 n. 



Ventriculites, 208, 208 



Venus's Flower - basket ( = Euplcctdla 

 aspergillum), 197 



Venus's girdle, 420 



Veretilleae, 364 



Veretillum, 364 



Vermicles, of Gaule, a name for Lankester- 

 ella, 102 



Verrucae, 331 



Verrucella, 357 ; V. guadaloupeusis, 357 



Vertebra, of Ophiuroidea, 481, 491 ; of 

 Streptophiurae, 491, 494 ; of Ophio- 

 teresis, 481, 491 ; of Ophiohclus, 491, 

 493 ; of Zygophiurae, 491 ; of Ophiothrix 

 fragilis, 480 ; of Cpkunuchna, 481 ; of 

 Cladophiurae, 491, 500; of A strosc/w ma, 

 481 ; of Gorgonocephalus, 491 ; of . 

 phyton, 491 ; of fossil Ophiuroidea, 501, 

 502 



Vertebrates, cold-blooded, hosts of Haeino- 

 sporidae, 102 



Verticilladeae, 363 



Verworn, on general physiology and proto- 

 plasm, 3 11. ; on protoplasmic movements, 

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

 Tludassicolla nucleata, 79 n. 



Vesicular nucleus, 25 



Vestibule, of Peritrichaceae, 145 ; . 

 chesium, 146 ; of Yorticella, 156, 157 



