34 PROCEEDINGS OF THE NATIONAL MUSEUM vol. iis 



hinge of gnathopod 2, and by the much more slender second gnathopod 

 of the female having a transverse, not oblique and slightly sinuous 

 palm. 



From A. mea Gurjanova (1938 and 1950) this species differs by the 

 development of a palmar process on male gnathopod 2, the broader 

 second article of pereopod 3 and the more slender female gnathopod 

 2 with transverse palm. The present material corresponds with 

 A. mea in the strongly setose second male antenna; the male gnathopod 

 2 figured by Gurjanova could be one stage of the development in the 

 present material. The female gnathopod 2 shown by Gurjanova, 

 however, is most distinct; otherwise I should assign this material to 

 that species. Possibly her "female" was a young male. 



From A. annenkovae this material dilBFers again by the female 

 second gnathopod, which in that species is quite large and well 

 developed, and the male gnathopod 2 of A. mea has a series of small 

 protuberances along its palm, not just one near the finger hinge. 



The possibility exists that the three species mentioned above may 

 represent stages in a single growth series and that the females de- 

 scribed for each of the species above are stages of old age. For the 

 present, these materials must be segregated from those mentioned 

 above. 



Ampithoe orientalis, as redescribed by J. L. Barnard (1955) is very 

 similar, but article 6 of gnathopod 1 is more slender, and the fully 

 developed process at the distal end of the palm is not sculptured as 

 fully as in A. tea. 



Ampithoe valida Smith 

 Figures 22, 23 



Amphithoe [sic] valida Smith, 1873, p. 563. — Paulmier, 1905, pp. 164-165, fig. 34. 

 Ampithoe valida, Alderman, 1936, p. 68. — J. L. Barnard, 1954a, pp. 34-35, pi. 



31 — Nagata, 1960, 176, pi. 16, figs. 97-98. 

 Ampithoe shimizuensis Stephensen, 1944, pp. 77-80, figs. 27-28. 



Diagnosis: Second and third pleonal epimera with very slight 

 points at lower posterior corners; article 5 of male gnathopod 1 

 slightly longer than article 6, posterior edge of article 5 forming a 

 broad hind lobe with a distal projection, article 2 strongly setose, palm 

 oblique; gnathopod 2 with large rounded lobes on articles 2 and 3, 

 article 5 with narrow hind lobe, article 6 elongated, rectangular, palm 

 transverse, bearing a quadrate middle bimip, finger curved, fitting 

 palm; article 2 of pereopods 1-2 about 2.5 times as long as broad; 

 ventral edge of article 1 on antenna 1 bearing setae, no spines; 

 antennae 1 and 2 equal in length, flagellum of antenna 1 twice as long 

 as that of antenna 2, neither flagellum strongly setose; apical lobules 

 of lower lip so broad and appressed that they mask their separating 



