ARACHNIDA (The Spicier) 



Take Morphophysiologic Study of the spider. 

 Take Systematic Study for Branch Arthropoda. 



MORPHOPHYSIOLOGIC STUDY OF THE SPIDER. 

 A. External Morphology 



1. The Cephalothorax (head and thorax united). 



(1) Segmented or unsegmented? 



(2) Shape? 



(3) Color? 



(4) Attachment to thorax? 



(5) Its one marked pecuharity? 



(6) Appendages. 



(a) Antennae present or absent? 



(b) Compound eyes present or absent? 



(c) Simple eyes present or absent? 



(1) Number? 



(2) Location? Show by sketch. 



(3) Color? 



(4) Shape? 



(5) Use? 



(d) Mandibles or jaws (chelicerae). 



(1) Shape? 



(2) Number of segments? 



(3) Number of fangs? 



(4) Use? 



(e) Pedipalpi, palpi, maxillae, or second pair of jaws 



present? 



(f) Mouth-parts for biting or sucking? 



(g) The legs. 



(1) Number of pairs? 



(2) Of same size, or do they vary? 



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