425 
them) in Dariaella, — and the urosome well developed in Mimo- 
nectes, reduced in the other genus. 
The antennæ are well developed, but ant. 1 without accessory 
flagellum. The oral parts are rather reduced. The epistomal plate 
very little prominent; it was impossible to give any drawing of the 
posterior lip. The mandibles are simple, without any special structure 
Fig. 2. The head, oral parts and urosome. The fig. in the right corner above shows 
the end of the urosome with the third urosome segment (?) and the third pair of 
uropoda (?). 
and*without palp, but the two pairs of maxillæ rather normal. The 
maxillipedes consist of two basal joints, a pair of large, helmet- 
shaped ovate plates (probably the outer lobi), covering the other 
oral parts, and a pair of curvate, acute plates (the inner lobi), 
lying inside the large plates. Thus the oral parts bear a close re- 
semblance to those in Mimonectes The helmet-shaped maxillipedes 
are also found in the two strange pelagic (or semi-parisitic) Lysi- 
anassidæ Thoriella islandica K. St. and Chevreuxiella metopoides K. St. 
(see K. Stephensen: Isopoda-Amphipoda; Report on the 
Danish Oceanographical Expeditions 1908 —10 to the Mediter- 
ranean and adjacent Seas, vol. II, D. 1, 1915, pp. 39—43, figs. 23— 
25), but in Chevreuxiella they are not so highly reduced. 
