EXPLANATION OF PLATE LV.a.* 



Cerapus abditus, Templeton. 



n.s. — Lines indicating lengtli of the tubes shown in the adjoining 

 figure. 



U.S., a.i. — First and second antenna?, with last two joints of the 

 first antennae more highly magnified. 



gn.l, gn.2. — First and second gnathopods. 



Pl.D. — Dorsal view of pleon f rom the fourth segment to the end. 



PI V. — Ventral view of the same pleon, much more highly magni- 

 fied. In this view all three uropods are visible ; in the 

 dorsal view the second uropods can scarcely be seen. 

 All the detail figures are from a male specimen. The tube 



contained a large female specimen. 



