CRUSTACEA COLLECTED IN PUGET SOUND, N.A. 285 



Aoroides columbicc, n. sp. PI. XVI., figs. 7 — 10. 



Nine females. Length 5 mm. 



Kesembles the female of Microdeutopus anomalies 

 (Kathke) in all respects except as above and the follow- 

 ing :— 



Anterior coxal plates with the lower margins rounded. 



First joints of the last 3 pairs of peraeopods wider than 

 in M. anomalies. 



First uropods extending a little beyond the second, and 

 these a little beyond the third ; peduncle of the third as 

 long as the two equal rami ; 2 or 3 spines at its distal 

 end ; inner ramus with one spine about the middle of the 

 inner margin ; outer ramus with terminal spines only. 



It is unfortunate that there was no male among the 

 specimens collected ; in this group there is a very close 

 resemblance between the females of the different genera 

 and species, while the males are easily distinguished by 

 their powerful and highly-specialized first gnathopods. 

 The genus, however, is easily distinguished by the entire 

 absence of an accessory appendage to the upper antennae, 

 and the very slight mandibular palp. 



Podoceropsis excavata (Sp. Bate). 



One male (both pairs of antennae wanting). Length 

 5*5 mm. 



As far as can be judged in the absence of the antennae, 

 there is no difference between this specimen and a young 

 male of about the same size from Liverpool Bay, except 

 a very slight one in the sculpturing of the palm of the 

 second gnathopods. 



Family Podocerid^;. 

 Genus Amphithoe, Leach. 



Amphithoe rubella, Dana. 



One specimen. Length 13 mm. 



