Bibliographical Notice. 475 Fig. 3. Araneus Woodfordi, sp. a. Dorsal surface of cephalothorax and abdomen. Fig. 3 a. Ditto. Vulva. Fig. 4. Pasilobus mammatus, sp. n. Dorsal view. Fig. 5. Actinaccmtha metallica, sp. n. Dorsal view. Fig. 6. Gasteracantha signifer, sp. n. Dorsal view. Fig. 7. Dolomedes laticeps, sp. u. Eight palpal organ from below. Fig. 8. Palgstes speciosus, sp. n. Vulva. Fig. 8 a. Ditto. Right palpal organ from below. Figs. 9, 9 a, Heteropoda {Parhedrus) mecistopus, sp. n. Right palpal organ from below. Fig. 10. Bathippus macroprotopus, sp. n. Dorsal view. Fig. 11. Fustirognuthus oscitans, gen. et sp. n. Anterior view of head and mandibles. Fig. 11 «. Ditto. Side view of carapace. Fig. 116. Ditto. Labium and maxilla. BIBLIOGEAPHICAL NOTICE. Fossil Plants : for Students of Botany and Geology. By A. C. Seward, M.A., F.G.S., &c. Vol. I. With Frontispiece and 111 other Illustrations. Pages xviii and 452. 8vo. University Press, Cambridge. 1898. This volume is one of the Biological series of the Cambridge Xatural Science Manuals. The mutual bearings of Geology and Botany are well considered by the author in his preface, and clearly elucidated throughout his work. He intimates, with good reason, that both of these branches of science are rarely sufficiently well understood by one and the same naturalist ; for a botanist will probably with ease get enough knowledge of geology, without working its deeper and more complicated problems, to be assured of its value in palceobotany ; whilst, on the other hand, a geologist, taking up the subject intently, would require an intimate knowledge of the ad-vanced and manifold researches of recent botany. In the third place, students having a general knowledge of natural science can find interest and instruction in such an earnest, clear, and compre-hensive exposition of the principles and facts concerning petrified plants as this manual now before us. The difficulty of clearing away the physical obscurities from fossil plant-remains, due to their imbedment, mineralization, and im-perfections, doubtlessly delayed botanists from attempting to co-relate them with living forms to any great extent ; and when they knew of the relative age and successional occurrence of these fossils, they co\ild not feel sufficient interest to study their geological history in detail. Fossil-collectors, applying a limited knowledge of recent plants to the desired explanation of fossil leaves, fruits, and wood, made very slow advance ; but they obtained some good results with careful use of the hand-lens. "With the compound microscope, however, and the acquired art of making more or less transparent
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