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PROCEEDINGS OF THE NATIONAL MUSEUM 



and not easy to recognize as normally ampithoid. Thus, the genus 

 is easily confused with aorids because it is an ampithoid with en- 

 larged first gnathopods. Young of the species resemble Microdeutopus 

 tridens, with which they might be confused on the basis of the acutely 

 produced first coxa. From various species of Lembos they are seg- 

 regated by the very slender, poorly setose mandibular palps, which 

 can be seen projecting anteriorly below the second antennae; species 

 of Lembos have well-developed palps with falcate, setose third articles. 

 Distribution: Indo-Pacific tropical. 



Genus Pleonexes Bate 

 Pleonexes (?) Species 



Figure 34 

 Diagnosis: Antennae missing; eyes large, nearly round; article 5 of 

 gnathopod 1 shorter than 6, the palm of article 6 oblique; gnathopod 

 2 with anterodistal edge of article 2 produced into a large leaflike 

 process, article 5 very short, lobate, article 6 large, as broad as long, 

 palm nearly transverse, slightly convex, lacking defining spine, article 



Figure 34. — Pleonexes species, male, 4 mm., Abbott sta. 141-D-3: a, mandible; b, lower lip; 

 c,d, gnathopods 1, 2; e-k, pereopods 1, 3, 4, 5; i-k, uropods 1, 2, 3; /, telson. 



7 curved, fitting palm; article 2 of pereopods 1-2 stout, article 4 not 

 produced in front; pereopods 3-5 with distal end of article 6 slightly 

 widened, bearing 4 stout teeth, one of which is folded back on the 

 false palm and is heavily striated; article 2 of pereopod 3 with stout 

 proximal anterior spine; uropods 1 and 2 with spines on both rami, 

 spines sparse on peduncles; telson linguiform, rounded apicaUy, lacking 

 large hooks. 



