1922.] S.Kemp: Notes on Crustacea Decapoda. 179 



Periclimenes (Ancylocaris) americanus (Kingsley). 



1878. Ancliistia americana, Kingsley, Proc. Acad. Sci. Philadelphia, 



p. 96. 

 1882. Anchisfia amertcana, Kingsley, Bull. Essex Inst. XIV, p. 109 



pi. ii, fig. to. 

 1901. Periclimenes americanus, Rathbun, Bull. U. S. Fish Comm . 



XX, ii, p. 121. 



This species is related to P. seychellensis, but differs in the 

 following points : — (i) the rostrum is shallow and its upper border 

 is nearly straight ; (ii) there is no papilla on the eyestalk ; (iii) 

 the antennal scale is proportionately narrower; (iv) the first perae- 

 opods are much longer, extending beyond the scale by the length 

 of the chela ; (v) the carpus of these legs is conspicuously longer 

 than the chela ; (vi) the second peraeopods are much longer, ex- 

 tending beyond the scale by the whole of the carpus and chela ; 

 (vii) the carpus in these legs is shorter than the palm and the 

 fingers are less than half as long as the palm ; (viii) the last three 

 peraeopods are much longer, the third reaching beyond the scale 

 by nearly half the length of the propodus. 



The species is known from the West Indies, Yucatan, Florida 

 and the Bermudas. The specimens I have seen are from the last 

 'named locality. 



Periclimenes (Ancylocaris) tenellus (Smith). 



1882. Ancliistia tenella, Smith, Bull. Mus. Comp. Zool. Harvard X, 

 p. 55, pi. ix, fig. 1. 



N. W.. Atlantic/ 32V N., 78°37'3o" W., 229 fathoms. 



Periclimenes (Ancylocaris) diversipes, sp. nov. 



The rostrum (text-fig. 36) varies considerably in length. 

 Usually it reaches to the end of the second segment of the anten- 



Text-fig. 36. — Periclimenes diversipes, sp. nov. 

 Anterior part of carapace, rostrum, etc. 



nular peduncle ; sometimes it is shorter, reaching only to the end 

 of the first segment, sometimes longer, reaching the end of the 



