. An introduction to zoology, with directions for practical work (invertebrates). xiii MYRIApODA 201 and the whole process of weaving it 'and fllliiig. it with air may be watched. ; 6. Search for spiders of other kinds and for Harvestmen in garden and field, and watch their ways in their natural habitat. Identify them by reference to British Spiders, by E. F. Staveley (1866), or The Spiders of Great Britain and Ireland, by Blackwall (1864). 7. During the summer, look out for lime leaves with nail gaUs on them. Examine them at different times during the summer, and try and trace the life-histor
. An introduction to zoology, with directions for practical work (invertebrates). xiii MYRIApODA 201 and the whole process of weaving it 'and fllliiig. it with air may be watched. ; 6. Search for spiders of other kinds and for Harvestmen in garden and field, and watch their ways in their natural habitat. Identify them by reference to British Spiders, by E. F. Staveley (1866), or The Spiders of Great Britain and Ireland, by Blackwall (1864). 7. During the summer, look out for lime leaves with nail gaUs on them. Examine them at different times during the summer, and try and trace the life-history of the gall-mite inhabiting them. A microscope and some section-cutting wiU. be necessary. Examine also the various pimple-galls due to Mites, to be found on the leaves of sycamore or maple, sallow willow, alder, pear, and blackthorn. Class III.: MYRIAPODA The members of this little group of Arthropods breathe by tracheae like insects (see p. 210), but they differ from them in the form and internal structure of their bodies, and also in the raany pairs of appendages which specially char- acterise them. They live in dark and moist spots, running or wriggling over the ground, or hiding in rotten wood or under a stone. The body of a Myriapod pjg_ 134. _Two seg- is of much the same width throughout, mexiisoi Polydesmus. and there is no marked distinction be- Ventral view to show ,, . J i,j • 1 J. the attachment of the tween thoracic aind abdominal segments, j ^ each of which is covered by an exo- skeleton of chitin, with, in some cases, lime deposited in it. Each segment has, as a rule, one or two pairs of jointed appendages attached to it. The class Myriapoda is conveniently divided into two groups, which contain respectively the Millipedes and the Centipedes. Millipedes (Chilogkatha) Millipedes have cylindrical bodies and short antennae (Fig. 135,. J); they are slow-moving, inoffensive little creatures, with hard scaly skins of chitin and lime forming a ring round each segmen
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherlondo, bookyear1913
