156 U.S. NATIONAL MUSEUM BULLETIN 271 



minute, vestigial; male gnathopod 1 subchelate, articles 4-5 lacking 

 teeth, articles 5-6 subequal, female gnathopod 1 scarcely subchelate; 

 male gnathopod 2 subchelate, poorly setose, article 5 slightly longer 

 than 6; uropod 3 uniramous, ramus equal to peduncle. Species: 1, 

 S.E. Australia, littoral. 



Rudilemboides J. L. Barnard 



Rudilemboides J. L. Barnard, 1959a. 



Type-species: R. stenopropodus J. L. Barnard, 1959a (original 

 designation) . 



Article 3 of antenna 1 shorter than article 1, accessory flagellum 

 present; male gnathopod 1 simple, lacking teeth, article 5 much 

 broader and longer than article 6, female gnathopod 1 subchelate; 

 male gnathopod 2 nearly simple, poorly setose, article 5 longest; 

 rami of uropod 3 equal, longer than peduncle. Species: 1, California, 

 littoral. 



Uncinotarsus L'Hardy and Truchot 



Uncinotarsus L'Hardy and Truchot, 1964. 



Type-species: U. pellucidus L'Hardy and Truchot, 1964 (original 

 designation) . 



Article 3 of antenna 1 shorter than article 1, accessory flagellum 

 2-articulate; male gnathopod 1 subchelate, articles 4-5 lacking teeth, 

 article 6 broader and longer than article 5, female gnathopod 1 sub- 

 chelate; male gnathopod 2 subchelate, not heavily setose, article 6 

 longer than 5; uropod 2 with one ramus; rami of uropod 3 absent. 

 Species: 1, Atlantic France, littoral. Differs from Concholestes in 

 Corophiidae by slender antenna 2 being shorter than antenna 1, by 

 gnathopod 1 being larger than 2, by the short article 3 of antenna 1, 

 acuminate coxae 5-7, slender pereopods 1-2, and elongate pereopods 

 3-5. 



Xenocheira Haswell 



Xenocheira Haswell, 1880b.— Stebbing, 1906. 



Type-species: X. fasciata Haswell, 1880b (monotypy). See Pirlot, 

 1938. 



Article 3 of antenna 1 shorter than article 1, accessory flagellum 

 present; male gnathopod 1 subchelate, articles 4-5 lacking teeth; 

 female gnathopod 1 subchelate; male gnathopod 2 simple, female 

 minutely subchelate, article 6 longest, article 5 strongly setose 

 anteriorly and very bulbous; gnathopod 2 extremely setose; rami of 

 uropod 3 equal, longer than peduncle; coxae 1-2 subequal in size, 

 short, wider than long, coxa 1 not concealed by coxa 2 (Lep tocheirus) . 

 Species: 2, tropical Pacific, littoral. 



