PLATE XLI. 

 Haliporus equalis (p. 285). 



Fig. 1. Lateral view. 



,, 1", $ . Ventral aspect of male. First pair of pleopoda, with petasma attached and 

 thrown back. 



„ V" , %. Ventral aspect of female, showing thelycum. 



br. Branchiae, seen in position. 



br". Last three somites of the pleon ; the arthrobranchise of the third and fourth 

 pairs of pereiopoda removed, to show the peculiar ducts that connect the 

 pleurobranchiaa with their somites ; mb, mastigobranchia of the third and 

 fourth somites. 



Haliporus obliquirostris (p. 286). 

 ,, 2. Lateral aspect. 

 ,, 2", ?. Ventral aspect of female. 



