192 



THE AMERICAX X A TL' R A LI ST. [\-(>i,. XXX V 1 1 1. 



of the abdomen, now and then, the claws hnally clasj) hold 

 of the stalk of the egg case. As these hii;- claws have the 

 same larval character found m Astaciis, that is recurxed or 

 hooked tips, they become firmly fixed m the material ot the egg- 

 string and aj^parently the larva could not get Iree again. 'I he 

 larva is thus made fast fore and aft, its claws are fast to the 

 egg stalk and its anus is hist to the cast skm withm the egg 



case. As the egg cases are still firmly tied to the pleopods 

 by the strong egg stalks the larvae live still pendent from and 

 for protection dependent upon the mother. 



Such a larva 24 hours after hatching is shown in Fig. 9, 

 As in the European crayfish the young is hatched with a swollen 

 globular head-thorax with proportions strikingly unlike those 

 of the adult, but in life the head thorax is not so disjiropor- 



