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U.S. NATIONAL. MUSEUM BULLfETEST 271 



Figure 29. — -Stilipedidae: a, mandible [see Synopiidae, Hyperiopsidae, Astyridae, Laphy- 

 stiopsidae]; b, extremes of accessory flagellum, vestigial or absent [see Pardaliscidae 

 which usually have multiarticulate condition]; c,d, maxillae 1, 2, foliaceous [see Par- 

 daliscidae, never having foliaceous maxilla 2, Laphystiopsidae]; e, gnathopod 1, simple 

 (gnathopod 2 also);/, telson. 



Acanthonotozomatidae have their mouthparts grouped as a conical bundle and only one 



acanthonotozomatid genus has foliaceous maxillae. 



