502 



INDEX AND GLOSSARY 



Stenmm (<rripfOy, the breast), 320 _ 

 Stigma {a-riyixa, a spot), the receptive ex- 

 tremity of ttie style, 465 

 Stimulus, various kinds of, a86 

 Stock. See Colony. 

 Stomach, Starfish, 310 : Crayfish, 333 : 



Mussel, 355: Dogfish, 381. 

 Stom'ate ((rro^a, mouth), 421 

 Stomodae'um (a-Toria, mouth : o&aloi, be- 

 longing to a way), an ectodermal pouch 

 which unites with the enteron and forms 

 the anterior end of the enteric canal, its 

 aperture being the permanent mouth, 

 296 

 Stone-canal, Starfish, 314 

 Style {^stylus, a column), the distal solid 

 portion of the female sporophyll or of the 

 entire gyn<ccium in Angiosperms, 467 

 8TTIiOHY0HIA(<rTvAo«, a column : o»T;f, 

 a claw), Figure, 117: occurrence and 

 general characters, 116 : polymorphism 

 of rili.n, 118 

 Sub-aplcal cell. See Segmental cell. 

 Superficial aggregate, 203 

 Supporting lamella. See Mesogloea. 

 Suspensor : Selaginella, 446 : Gymno- 



spcriiis. 450 : Angiospcrms. 475 

 Sweet Wort, composition of, 75 

 Swimming-bell, Diphyes, 348 

 Symbiosis ((rvfi^tua-tf, a living with), an 

 intimate and mutually advantageous 

 association between two organisms, 154 

 Syner'g^dSB ((rvKcp^bt, a fellow worker), 



■♦74 ... . 



Systole ((TvoToXij, a drawing together, 

 contraction), the phase of contraction of 

 a heart, contractile vacuole, &c., iii 



Teetb, Dogfish, 799 



Telson, 320 



Temperature, effects of on protoplasmic 



movements, 20 



Tentacles : — Hydra, 320, 323 : Bougain- 

 villea, 336 ; Polygordius, 368 : Starfish, 

 308 



Tergum {tergum, back), 330 



Term'lnal bud :— Nitella, 206, 308 : Moss, 

 403 



Testis (the Latin word), generally used for 

 the spermary (g.v.) in animals. 



Thermal death-point. See Ultra-maxi- 

 mum temperature. 



Tissues, differentiation of: — Polygordius, 

 288 : Fern, 420 



Tracheldes (rpaxv?, rough : e'Sov, form), 

 417, 452 



Transpiration, the giving off of water 

 from the leaves of plants, 409 



Trloh'ocyst (flpt'f, a hair : kvitth, a bag), 



"3 

 TrlplOblast'lC (jpurAoo?, triple : |3Aa<7T<i«, 

 a bud), three-layered : applied to ani- 



mals in which the body consists of ecto- 

 derm, mesoderm, and endoderm, 236, 



275 



Troch'osphere (Tpoxos,a wheel, in reference 

 to the circlet of cilia : <T<\)alpa, a sphere), 

 the free-swimming larva of Polygordius, 

 &c. :— characters of, 293 (Figure) ; origm 

 of from gastrula, 295 : metamorphosis of, 

 298 



Tube-feet, Starfish, 307, 314 



u 



Ultra-maximum temperature, for amoe- 

 boid movements, 21 : for monads, 40 ; for 

 H.ict>;ri.-i, 93 



IJLVA (iilfa, an aquatic plant), 203 



Umbell ate (imifi^lla, a sunshade, um- 

 brella) applied to branching in which 

 the primary axis is of limited growth and 

 sends off a number of secondary axes 

 from its distal end, 138 



Unicellular, formed of a single cell, 6i : 

 connection of uni- with multi-cellular 

 organisms, 361 



UnlO. See Mussel. 



Ureter (ovpijrqp, the Greek name), the 

 duct of the kidney, 396 



Uropod (ovpa, tail : iruvv, foot), 333 



Vac'uole (-■acuus, empty), contractile, 11, 

 III : non-contractile, 71 



Variability, 147 



Variation, individual, 140, 147 



Variety, an incipient species, 147 



Vascular (vasculum, a small vessel) 

 bundles. 411, 416, 450, 462 



Vascular Dlants, 417 



VAUCHERIA (after I. P. E. Vaucher, a 

 Swiss botanist) :— Figure, 870: occur- 

 rence and general characters, 1 69 : minute 

 structure, 169 : asexual reproduction, 171 : 

 sexual reproduction, 172 : nutrition, 174 



Vegetative cell, 455 



Vegetative nucleus, 474 



Veins, of Crayfish, 338 : of Mussel, 362 : 

 of Dogfish, 387 : of leaves, ^20 



Vel'um (rielum, a veil) of medusa, 240 



Venter (venter, the belly), of ovary of 

 Moss, 404, and Fern, 426 : of the female 

 sporophyll or of the entire gynoecium of 

 Angiosperms (so-called ovary) 465, 473 



Ventral nerve-cord:— Polygordius, 383: 

 development of, 298 : Crayfish, 341 



Ventricle. !>ee Heart. 



Vermes, the 305 



Ver'te^TSil (Ter/eirn, a joint) Centra and 

 column, Dogfish, 376 



Vertebrata, the, 306 



Vessels :— of plants, spiral and .scalariform 

 416, 419 : of animals, see Blood-vessels. 



