502 



INDEX AND GLOSSARY 



Sternum (crrepvov, the breast), 320 



Stigma (ori'-yua, a spot), the receptive ex- 

 tremity of the style, 465 



Stimulus, various kinds of, 286 



Stock. See Colony. 



Stomach, Starfish, 310 : Crayfish, 332 : 

 Mussel, 355 : Dogfish, 381. 



Stom'ate (erro/na, mouth), 421 



Stomodae um (aTo/u.a, mouth : ofiatos, 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 gynoecium in Angiosperms, 467 



STYLONYCH'IA(o-TvAos, a column : owl;, 

 a claw), Figure, 117 : occurrence and 

 general characters, i ID : polymorphism 

 of cilia, 118 



Sub-apical cell. See Segmental cell. 



Superficial aggregate, 202 



Supporting lamella. See Mesogloea. 



Suspensor : Selagiriella, 446 : Gymno- 

 spenns, 459 : Angiosperms. 475 



Sweet Wort, composition of, 75 



Swimming-bell, Diphyes, 248 



Symbio'siS (o-v/u/Buocris, a living with), an 

 intimate and mutually advantageous 

 association between two organisms, 154 



Syner'gid.86 (o-uvepyos, a fellow worker), 



Sys'tole (<rv<TToATj, a drawing together, 

 contraction), the phase of contraction of 

 a heart, contractile vacuole, &c., in 



Teeth, Dogfish, 799 



Telson, 320 



Temperature, effects of on protoplasmic 



movements, 20 

 Tentacles : Hydra, 220, 222 : Bougain- 



villea, 236 ; Polygordius, 268 : Starfish, 



308 



Tergum (tergum, back), 320 

 Term'inal bud : Nitella, 206, 208 : Moss, 



403 

 TestiS (the Latin word), generally used for 



thespermary (q.v.) in animals. 



Thermal death-point. See Ultra-maxi 



mum temperature. 

 Tissues, differentiation of: Polygordius, 



288 : Fern, 420 

 Tracheides (rpaxus, rough : eifios, form), 



417. 452 



Transpiration, the giving off of water 



from the leaves of plants, 409 

 Trich'ocyst (0pt', a hair : KVOTI?, a bag), 



Triploblast'iC (rpinkoos, triple : /SAaffTos, 

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



mals in which the body consists of ecto- 

 derm, mesoderm, and endoderm, 236, 

 2 75 



Troch'OSphere(Tpoxo5,awheel,in reference 

 to the circlet of cilia : cr<J>aipa, a sphere), 

 the free-swimming larva of Polygordius, 

 &c. : characters of, 293 (Figure) : origin 

 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 

 Bacteria, 93 



ULVA (ulva, an aquatic plant), 203 



Umbell'ate (umbella, a sun-shade, 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 



Unicell'ular, formed of a single cell, 61 : 

 connection of uni- with multi-cellular 

 organisms, 261 



UniO. See Mussel. 



Ureter (ovprjTrjp, the Greek name), the 

 duct of the kidney, 396 



Uropod (ovpa, tail : TTOVS, foot), 323 



Vac'uole (vacuus, empty), contractile, n, 

 in : non-contractile, 71 



Variability, 147 



Variation, individual, 140, 147 



Variety, an incipient species, 147 



Vasc'ular (vasculum, a small vessel) 

 bundles. 413, 416, 450, 462 



Vascular plants, 417 



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

 Swiss botanist) : Figure, 870 : occur- 

 rence and general characters, 169 : 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, 420 



Vel'um (velum, 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, 283 : 

 development of, 298 : Crayfish, 341 



Ventricle. J-ee Heart. 



Vennes. the 305 



Ver'tebral (vertebra, a joint) centra and 

 column. Dogfish, 376 



Vertebrata, the, 306 



Vessels : of plants spiral and scalariform 

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



