70 



HISTORY OF CRUSTACEA. 



CHAP. VIII. 



face of the Slater is united to the larval skin a little 

 behind the head. At this point, when the union has 

 been dissolved a little before the change of skin, there 

 is a foliaceous appendage, which exists only for a short 

 time, and disappears before the young Slater quits the 

 brood-pouch of the mother. 



F ig . 37.' 



The young animal, when it begins to take care of 

 itself, resembles the old ones in almost all parts, except 

 one important difference ; it possesses only six, instead of 

 seven pairs of ambulatory feet ; and the last segment of 

 the middle-body is but slightly developed and destitute 

 of appendages. It need hardly be mentioned that the 

 sexual peculiarities are not yet developed, and that in 

 the males the handlike enlargements of the anterior 

 ambulatory feet and the copulatory appendages are 

 still deficient. 



2 Fig. 37. Maggot-like larva of Ligia, magn. 15 diam. R. remains 

 of the egg-membrane. We see on the lower surface, from before back- 

 wards : the anterior and posterior antennae, the mandibles, the anterior 

 and posterior maxillae, maxillipedes, six ambulatory feet, the last seg- 

 ment of the middle-body destitute of appendages, five abdominal feet, 

 and the caudal feet. 



