INDEX AND GLOSSARY. 433 



Urates, 313. 



Ureters, 212. 



Urea, 301. 



Uriniferous Tubes, 211. Glandular tubes of kidney. 



Unstriped Muscle, 198. Involuntary fibres. 



Unipolar Nerve-cell, 199. Cells with one fibre. 



Umbilical Vesicle, 203. An appendage of the vertebrate 

 foetus. 



Ulvacese, 151. A family of Confervoid Algae. 



Varieties of bioplasm, 123. 



Vascular tissue, 201. 



Valentin's knife, 62. 



Vacuoles, 162. Spaces or watery vesicles in the bodies of 

 Infusoria, etc. 



Vaginal Discharges, 319. 



Vernier, 43. A short graduated scale, sliding on a larger 

 scale, so as to show fractions of divisions. 



Vegetable cells, 128, 134. 



Velella, 167. A genus of animals now referred to the Hy- 

 drozoa. 



Ventral Laminse of Embryo, 203. Parts of the blastoderm of 

 the ovum. 



Vegetative Organs, 206. Pertaining to nutrition, etc. 



Vesicles, 254. Products of inflammation of the skin. 



Vtbriones, 135. See Vibrio. 



Vinegar Eels, 171. A kind of Xematoid worms. 



Vine Disease, 136. A species of fungus. 



Vibrio, 327. A genus of filamentous Bacteria. 



Vibracula, 169. Appendages of Polyzoa, from which vibra- 

 tile filaments project. 



Vitellus, 201. The yolk of the ovum. 



Vitelline Membrane, 201. The membrane surrounding the 

 yolk in the ovum. 



Visual organs, 219. 



Vitreous humor, 220. 



Vorticella, 161. A genus of Infusoria. Bell-shaped animal- 

 cules. 



Volatile oil, 133. 



Volvox, 140. A genus of Confervoid Algoe. 



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