List of Plates. Author. To Face Page I. Maskell.—Desmidieæ 10 II. " " 18 III. " " IV. " " 30 V. " " VI. " " VII. Urquhart.—Gasteracantha ocellatum 154 VIII. Hudson.—Micro-Lepidoptera 190 IX. " Declana floccosa 192 X. Chilton.—Freshwater Crayfish 242 XI. Maskell.—Eurytoma, oleariæ 258 XII. " Cecidomyia oleariæ XIII. Thomson.—Crustacea 266 XIV. " " XV. Hutton.—Map of Glynn Wye District 274 XVI. " Map showing Distribution of Earthquake 282 XVII. " Reflection and Refraction of Earth-waves 290 XVIII. De Lautour.—Map of Oamaru District 294 XIX. " Sections 298 XX. " Diatoms, magnified XXI. " Diatoms 306 XXII. " " XXIII. " " 306 XXIV. Hill.—Section of South Pacific Company's Oil-well 322 XXV. Binns.—Striated Rock-surface 336 XXVI. Thomas.—Lake Taupo, showing Volcanic Mountains 342 XXVII. " Cone of Ngauruhoe XXVIII. " Tongariro 346 XXIX. " Map of Tongariro Summit XXX. " North Crater, Tongariro 350 XXXI. " Lakes on Summit of Tongariro XXXII. " Lake Taupo, showing Lake Terrace XXXIII. Williams.—Maps of Poverty Bay and Tolaga Bay. 394 XXXIV. Cussen.—Map of Waikato River Basin 410 XXXV. " Section of Walker's Gully XXXVI. Tregear.—Rafts made of Skins, &c 462