FAXON: NOTES ON THE CRUSTACEA. 155 



Iconaxius caribbseus, sp. nov. 



Plate I. Figs. 1-4. 



Similar to Iconaxius acutifrons Bate, but different in the form of the ros- 

 trum, which is much broader than in I. acutifrons, less triangular in its out- 

 line, and broadly rounded at the anterior end ; the upper border of the 

 propodite of the larger cheliped, moreover, is entire, not denticulate as in 

 /. acutifrons. The eyes are larger, and more heavily pigmented. 



The margins of the rostrum are minutely denticulate, as in I. acutifrons, 

 the median keel entire. 



Length, 17 mm. 



Station 166. 150 fathoms. 1 specimen. 

 " 232. 88 " 1 " 



" 241. 163 " 3 



" 283. 237 " 1 (type). 



Lives as a commensal in Sponges of the genus Farrea. 



The genus Iconaxius, of which four species have been previously described, 

 has a wide distribution in the warm and temperate seas. It has been recorded 

 from such remote localities as the Arabian Gulf, Banda Sea, Japan, Kernia- 

 dec Islands, and the Gulf of Panama. It is now for the first time recorded 

 from the Atlantic. 



Polycheles crucifer (W.-S.). 



Station 29. 

 135. 



955 fathoms. 

 450 " 



3 specimens. 

 1 



179. 



824 " 



1 (exuviae). 



" 180. 

 " 182. 



982 " 

 1,131 " 



1 specimen. 

 1 



" 188. 



372 " 



1 " 



" 190. 



542 " 



1 



Polycheles agassizii (A. M. Edw.). 



Station 129. 314 fathoms. 3 specimens. 



" 153. 303 " 1 



" 238. 127 " 1 



260. 291 " 1 " 



" XXVI. 297 " 1 



Polycheles sculptus Smith. 



Station 211. 357 fathoms. 3 specimens. 

 " 227. 573 " 1 " 



" 230. 464 " 1 



