PLATE XXI. 



Phoberus tenuimanus, nat. size (p. 171). 

 (Acanthacaris tenuimana on Plate.) 



a,a. Ophthalmopoda. 



c. Cephalon ; b, first antenna, left side ; c, second antenna, right side. 



c. Peduncle of second antenna, seen on the lower side. 



k. Chela of first pereiopod, left side. 



k'. Mastigobranchial leaf of same with podobranchial plume attached. 



k". Section of branchial plume. 



o. Chela of posterior pereiopod. 



p. First pleopod. 



q. Second pleopod. 



v,7,,v. Rhipidura ; z, telson ; vv, posterior pair of pleopoda. 



