114 
of the oral area. There are very slight seams between the coxal 
plates exclusive of those between the two last pairs; the fifth pair 
åre very small. 
Fig. 16. Holophryxus Acanthephyræ. The oral area. 
The ventral surface is, exclusive of the hindpart, somewhat 
concave. The oral area with the pereiopods is rather small and 
about semicircular. The antennæ seem to be articulated, the first 
Fig. 17. PE ml rug Acanthephyræ. 
d part from below. 
pair in 3, the second pair in 5 joints; but it is not excluded that 
the apparent articulation is in reality simple folds. Between the 
antennæ the tip of the mandibles is visible. The gnathopod lies 
