224 INDEX 



Sars, Prof., on encrinites, 174. Spines of sea-urchins, 36, 40. 



Sciopticon Company, the, 17. Spirorbis, 170. 



Scoresby, Dr., on snow-crys- Sponges, fossil, 67. 



tals, 194. Stone lilies, 173. 

 Scraper, 211. 



Sea-eggs, 39. Teeth, fossil, 209. 



Sea-urchin, 35 ; spikes of, 36, Telescope, the, 31. 



40; cilia of, 40 ; pedicel- Tertiary rocks, 84. 



larias of, 42. Thaumantias, 51. 



Selenite, 210. ' Thunderbolts,' 213. 



Silica, sources of, 65. Triceratium Favus, 113. 



Slack, Mr., on Floscule, 184. Twin pendulum, 116. 



Smith, Mr. T., 17, Tuscarora, 100. 



on fossil-sponge, 218. 



Somerville, Mrs. M., on phos- Ventriculites, 67. 



phorescence, 48. * Venus's flower basket,' 56. 



Snow, 191. Volvox globator, 185. 

 Snow-water, 194. 



Spear pyrites, 213. Water beetle, eye of, 199. 



Sphagnum, 143. Wood, fossil, 212. 



Butler & Tanner, The Selwood Printing Works, Frome, and London. 



