370 ME. G. S. BKADY ON ENTOMOSTEACA TAKEN 



The superior antennae are excessively slender, having the first 

 four joints of near equal length and about nine times as long as 

 broad, the last two about one-third the length of the preceding : 

 the lower antennae have a single seta at the apex of each joint 

 and one in the middle of the penultimate ; urticating seta long 

 and slender, triarticulate. Last leg having the second joint ex- 

 cessively long, the third about one-fourth and the last one half 

 of its length; ungues long, slender, and slightly curved. Length, 

 -jTb-th of an inch. 



Dredged in 16-30 fathoms, about eight miles from shore, be- 

 tween Sunderland and Seaham Harbour. Apparently not very 

 scarce, as a good series of specimens was obtained on this occa- 

 sion. It is remarkable, however, that so large a species should 

 have been overlooked, if it were present, in dredgings made on 

 previous occasions in the same district. Two explanations sug- 

 gest themselves — first, that the habitat of the species may be 

 restricted to an area north of Seaham which was dredged on this 

 occasion, other dredgings having been uniformly made further 

 south ; or secondly, that it may have been previously passed 

 over as the larva of a cirriped, to which it bears a very striking 

 resemblance when seen through a simple hand lens. Mr. Ro- 

 bertson has recently taken this species in Kilchattan Bay, Ayr- 

 shire. 



XiPHICHILUS AMYGDALOIDES, UOV. Sp. Plate XIII., figS. 8-10. 



Carapace as seen from the side oblong-oval or almond-shaped, 

 tapering gently to the extremities which are much narrowed, 

 rounded, and nearly equal in breadth, superior margin gently 

 and evenly arched, inferior also arched, but slightly sinuated in 

 front of the middle, greatest height in the middle and equal to 

 rather more than one-third of the length. Seen from above 

 much compressed, rhomboidal or doubly fusiform, tapering 

 equally from the middle, where it is widest, to the subacutely 

 pointed extremities ; greatest width equal to about half the 

 height or one-fifth of the length. Surface perfectly smooth ; 

 the transverse lines of the knife-like ventral margin very 



