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Transactions. 



on the anterior margin of the carpus of the first gnathopod. The two 

 species were united by Delia Valle, and in each there appear to be so many 

 varieties that it may be difficult to draw a distinction between them in 

 all cases. The more typical examples of M. inaequipes, however, appear 



Fig. 5. — Maera inaequipes, female — a specimen from Chatham Islands, gn'^, first 

 gnathopod (inner surface) ; gn^, second gnathopod (inner surface). 



to be distinguished by the more oblique palm of the second gnathopod, 

 and by having the third uropods considerably longer than the preceding 

 pairs. Stebbing (1906, p. 436, and 1910a, p. 599) describes the palm of the 

 second gnathopod as " almost transverse," and this usually appears to 



/?/ and urp. 



Fig. 6. — Maera inaequipes, iemAle — a specimen from Chatham Islands. 

 pi. and urp., terminal portion of body. 



be so in the males, but in the female it is distinctly oblique, though not 

 greatly so, and apparently this is also the case with some forms of the 

 male, as, e.g., in M. hirondellei Chevreux. The third uropods, again, appear 

 fairly long. Stebbing describes the rami as " not very long," but they 



