(79) ZITTEL, K. A. von: _Textbook of Palæontology_. English Translation 1900, p. 668. INDEX. Abdomen, 2, =2= Aegidae, 2 Air cavities, in abdominal appendages, 31 Air tubes, 1, 6, 31, 33, 34, 35, 36, 37, 39 _albidus, Trichoniscoides_, description of, 25 Alcohol, 16 Antennae, large, 2, =3= " smaller, 2, =3= Alimentary canal, 6, =7= Ants, 31 " wood, 14 Anus, 31, inset facing =10= Appendages, 2 " abdominal, 5, =6= _Archaeoniscus brodiei_, 2 Armadillidæ, 17 " characters of, 18, 40 _Armadillidium_, 15, 38 " _commutatum_, 41 " _depressum_, 44 " " description of, 43 " " flagellum of, =43= _Armadillidium nasatum_, 41, 44, Plate xxii. " " description of, 40 " " flagellum of, =40= _Armadillidium pictum_, 42 " _pulchellum_, 43, 44, 45, Plate xxxiv. " " description of, 42 " " flagellum of, =42= _Armadillidium vulgare_, 15, 40, 43, 44, Plate xxiii. " " description of, 41 " " flagellum of, =41= " " moulting of, 12, 13 " _zenckeri_, 41 _Armadillo ater_, 41 " _maculatus_, 41, 42 " _pillularis_, 41 " _pustulosus_, 41 " _trivialis_, 41 " _variegatus_, 41 " _vulgaris_, 41 Arthropoda, 1 Arteries, 7, =7= _asellus, Oniscus_, description of, 27 Avebury, Lord, 31 Baden, Miocene of, 2 Bate and Westwood, 17, 19, 30 Blastoderm, 10 Body cavity, 11, inset facing =10= Brady, Professor C. S., 45 Branchial nephrocytes, 8 British Association, 19 Brood pouch, 4, =5=, 9 Budde-Lund, 28 Calman, Dr., 45 Carpenter, 15 Cells, nucleated, 10, inset facing =10= Cephalic nephrocytes, 8 Cheslip, 15 Chiselbob, 15 Church louse, 16 Cicatricula, 10, inset facing =10= _cingendus, Metoponorthus_, description of, 38 Circulatory system, 6, 7 Classification, 17 Coal measures, 1 Collection of Woodlice, methods of, 16 Commissures, 8, =8= Conclusion, 43 _convexus, Cylisticus_, description of,39 _couchii, Philoscia_, description of, 30 Crabs, land, 1 Crustacea, 1 Cud worm, 15, 16 _Cylisticus_, 40 " characters of, 17, 18, 38 _Cylisticus convexus_, 44, Plate xxi. " " description of, 39 " " flagellum of, =39= " _laevis_, 35, 39 _Cymothoa oceanica_, 20 _danicus, Haplophthalmus_, description of, 27 _depressum, Armadillidium_, description of, 43 Development, 9 Digestive glands, 6, =7= _dilatatus, Porcellio_, description of, 33 Distribution of species, 43 Dollfus, Adrian, 45 Economic considerations, 12