ISOPODS OF NORTH AMERICA. till 



e. Terminal segment of alxlomcn entire. 

 /. Maxillipeds with seeond, third, and fnnrth articles of the palj) not 



produced into loht's (lenns SjiJt.rwyna Latreille 



/''. Maxillipeds with second, tliinl, and fourth articles of the palp pro- 

 duced into lobes Genus Exosph:ero)iiu Stebbing 



e^. Terminal segment of abdomen with a median emargination. 

 /. Second, third, and fourth articles of iialp of maxillipeds produced 



into lol^es Genus J)i/namene Leach 



_f. Second, tlnrd, and fourth articles of palp of maxillii)eds not produced 



into lobes Genus Puradipminene, new genus 



iV. Outer branch of uropoda not capable of folding under inner branch; 

 branches unlike, only outer one salient Genus Cilicsea Leach 



45. Genus ANCINUS Milne Edwards. 



Aljdomeii composed of two segments, tlie tirst segment formed b^^ 

 the fusion of several segments. 



Outer branch of the uropoda entirelj^ wanting. 



First and second pairs of legs subchelate; remaining pairs ambula- 

 tor}' . 



ANCINUS DEPRESSUS (Say). 



Nxm depressa Say, Jour. Acad. Nat. Sci. Phila., 1, 1818, jip. 488-484. — Richaki - 

 SOX, American Naturalist, XXXIV, 1900, p. 224; Proc. U. S. Nat. Mus., 

 XXIII, 1901, p. 537. 



Locality. — Egg Harbor, New Jersey. 



Dt'ptJi. — Found on surface. 



"Body broad, depres.sed, linear; first caudal segment concealed, 

 second attenuated; anterior feet monodactyle. 



''Inhabits Egg IIarl)or. 



"Cabinet of the Academy. 



"Body broad, depressed, punctured, sides parallel; segments sub- 

 equal, anterior ones rather shorter; first segment of the tail not visible, 

 secoad equal, as long as the three preceding visible ones, attenuated 

 to an obtuse point, which is carinated above and attained b}' the lateral, 

 spiniform, acute processes; beneath concave, effuse at tip; eves appar- 

 ently' lunated, but really rounded, with distant granules, and touching 

 the anterior segment of the body; hands of the anterior feet dilated, 

 ovate, thumb as long as the palm, nearly attaining the carpus, tip 

 closing within a prominent spinose tooth on the base of the palm; 

 hands of the second pair cylindric, incurved, with a process dentate 

 at tip and placed at the inner base, armed with an equal incurved 

 thumb not closing on the hand, obtuse, and furnished vrith a seta at 

 tip; remaining feet ciliated. 



"Length half an inch, breadth rather more than one-fifth of an inch. 



"Found with the preceding species, common.'"' — Say." 



«Jonrn. Acad. Nat. Sci. Phila., I, 1818, pp. 483-484. 



