CENTIPEDE AND INSECT 39 



the carriage and protection of the eggs, or, in hermit 

 crabs, for grasping shells. 



In insects we find a great variety of modes of 

 motion. Their larvae, terrestrial or aquatic, recall 



FlG. 6 Illustrating the common starting-point of both Centipedes, or 



many-legged air-breathing animals, and of the insects with six legs. 

 A. A Common Garden Centipede [Lithobius : from Koch's ' Myria- 

 poden'). B. Scolopendrella, the connecting link between A and C— 

 (Ajter Lang. ) c. A primitive Insect (Machilis) found under .-tones and 

 on the seashore. It shows the typical six-legged condition, but traces of 

 the abdominal feet are shown by the minute spines. - - ( After Oitdemans. ) 



