66 



Lessons in Zoology. 



The eara are in the lower joint of the small antennse, which ia 

 flattened on the npper side and sorronnded by hairs. If these are 

 pushed apart, a small, clear, oval space ie seen, which is the enter 

 ooyering of the ear. 



Pupils who thinh a lobster needs eyes in the back of bii head, 

 since he takes his flying leaps backwards, see how this need is met 

 by the movable eyestalks, which enable him to tnrn hia eyes in 

 any direction. 



Lesson III. 



Ssview of Lessons I. and II. 

 The following list of the lobster's appendages is pnt on the 

 blackboard, and the children are asked to tell all that they can 

 abont each pair : — 



1 pair of eyeatalka. 



2 pairs of antennae. 



1 pair of mandibles. 



2 pairs of little jaws. 



3 pairs of jaw-feet. 

 5 pairs of walking-legs. 



Abdomen. { 6 pairs of awimmereta. 



Cephalo-Thorm 



( 



Head-thorax. { 



I 



I,ARC£^NrENHfl._, 



Maho;ble 



MAX/tL« {^- 

 MAXlLLtPEDS [i. 



FlO. 4. 



For yonng ohildren these appendagea may be simply olasaified as 

 eyestalks, feelers, chewing feet, walking feet, and swimming feet. 



