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PROCEEDINGS OF THE NATIONAL MUSEUM 



from 0-28 in number. Posterior emargination rather deep, 5 mm. 

 in depth, with 13 rather conspicuous spines on one side, 14 on the 

 other, a Kttle irregularly placed and not quite similar in size; in 

 paratypes rather deep, 7-16 spines on each side. 



Eyes, nuchal organ, and supra-antennal crest as in female. 



Antennae, mandibulae, and maxillae as in female. 



Pairs of legs 60; in paratypes 60-67 (only 5 specimens counted). 

 Length of endites 2, 3, 4, and 5 on first leg 0.8, 3.4, 4 and 10.2 mm., 

 respectively; endopodite veiy short, fringed with setae on its caudal 

 margin; in paratypes varying lengths, but fifth endite always more 

 than double the length of fourth endite, reaching, when stretched 

 backward, more than halfway to end of carapace. On second leg 



Figure 22. Eleventh leg of a female paratype of Lepidurus lynchi, new species (Uppsala 

 (Mus.), X 12: a, Epipodite; b, pre-epidodite. 



Figure 23. — Last (seventy-first) leg of a female paratype of Lepidurus lynchi, new species 

 (Uppsala Mus.), X 200: a-e. First to fifth endite;/, endopodite; g, exopodite; h, epipodite. 



