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PROCEEDINGS OP THE NATIONAL. MUSEUM 



VOL. 71 



Tlip anal operciilnm is typically roundly produced and its edge is 

 smooth (fig. 6). 



The anterior antennae are 7-jointed, with a thick club-shaped 

 olfactory seta of the fourth joint slightly exceeding the end of the an- 

 tenna when stretched alongside the distal part of it. Between the 

 antennae is the rostral plate showing concentric markings and bear- 

 ing a small process at the end with two minute sense-hairs (fig. 7) . 



The outer branch of the posterior antennae is uniarticulate and 

 carries four unequal setae at the end (fig. 8) . 





HVON 



Ahl 



Alii 



Ah 6- 



Figs 3-4.— Moeaeia laurentica. 15, Urosome of female from below. 4, Urosome of male 



from below 



The mandibular palp is biarticulate and the basal part is recumbent, 

 a feature noted by C. van Douwe in M. schmeili and also figured by 

 T. Scott (1895, pi. 10, fig. 4). The two setae flanking the distal 

 joint were not made out in all preparations examined, but were seen 

 distinctly in the one figured (fig. 9). 



Maxilla: The distal lobe carries a strong seta plumose at the end 

 (fig. 10). 



First maxilliped: With three digitiform, pointed lobes (fig. 11). 



Second maxilliped: With very slender, terminal claw, and two 

 setulae, a proximal and a distal, on the outer border of the middle 

 joint (fig. 12). 



Swimming feet (pi to p5) : The following abbreviations may be 

 used : ri and re are the inner and outer branches ; si and se are the 



