158 Proceedings of the Biological Society of Washington. 



The arm spines are three; the uppermost is slightly longer than an arm 

 segment ; the central is slightly shorter than an arm segment ; the lowest 

 on the proximal part of the arm is slightly shorter than the central, but 

 on the outer portion of the arm is equal to it. 



The tentacle scale is single, small, more or less pointed; just within it 

 is a production of the border of the side arm plate which appears like a 

 second low tentacle scale. 



The under arm plates are small, low, triangular, with three straight 

 sides and an obtuse distal angle. 



Type.— Cat. No. 39,017, U. S. N. M., from "Albatross" Station 2789, 

 off the coast of Chile, in 1342 fathoms. 



