452 



U.S. NATIONAL MUSEUM BULLETIN 2 71 



Alexandrella assigned to the Stilipedidae, for its first maxillae are not 

 as foliaceous as those of the type-genus Stilipes. The palp is especially 

 strongly geniculate, resembling species of Hyperiopsidae. Astyridae 

 bear a distinct but nontriturative mandibular molar. Astyroides is 

 removed from the Astyridae and synonymized with Alexandrella. 



The Laphystiopsidae have normal maxillae, a mandibular molar, 

 and small maxillipedal plates. 



Figure 163. — Stilipedidae: a, Zlexandrella dentata Chevreux (1912b). Maxilla 1: h, 

 Alexandrella; c, Stilipes sanguineus (Hurley, 1954e). Maxilla 2: d, Stilipes. Maxilliped: 

 e, Alexandrella; f, Stilipes. 



