PLATE LXXI. 



Sergestes prehensilis (p. 385). 

 Fig. 1. Lateral view ; enlarged twice. 



a. Ophthalmopod 



b. First antenna. 



d. Mandible or siagon. 



e. First siagnopod. 

 /. Second siagnopod. 

 g. Third siagnopod. 



k. First pereiopod ; showing the prehensile character of the ultimate articulation. 



P. Pereion detached, with gnathopoda h, i, and pereiopoda h, I, m, n, o, connected, the 

 larger branchial plumes removed to show the position of their attachment to 

 the somite and the rudimentary form of the pleurobranchia. 



