PILUMXIDAE. 47 



Tari-Tari Id.; shore and reef; Jan. 6, 1000 ; 1 <?, 2 ?. 



Kusaie, Carolines ; 1900; 1 <$, 3 ? (ovig.). 



I find it necessary on examination of considerable material to unite the 

 ungulatus form with the nionticuhsus or obscurus form of Phymodius, or, in lieu 

 of this, to make five or six intergrading sub-species. 



In the absence of type specimens it is almost impossible to apply with 

 certainty the specific names already given. 



The series before me is far from complete, but it indicates that each form 

 of cheliped described by Dana and others may be attached to any form of 

 carapace ; and that carapaces with similar areolation vary in relative width 

 and in the width of the front. 



I have thought it desirable to tabulate some of these variations: — 



