194 STALK-EYED CRUSTACEA 



wide notches. The lateral horns are long, slender, and 

 directed directly outwards. The front is narrow and cut 

 into eight teeth, of which the two median are short and 

 sharp, the intermediate ones are longer ; the external or 

 orbital angles are short and a little obtuse. The superior 

 orbital border is straight, and is divided by two fissures. 

 The epistomian apophysis is a little projecting and does 

 not exceed the front. 



The first pair of legs, smooth, is very long and thin. 

 The length of the fourth joint equals the transverse 

 diameter of the carapace near the base of the lateral horns, 

 and the hand is twice this length. The anterior border 

 of the fourth joint has four, five, or six spines ; there is 

 another spine on the extremity of the posterior border. 

 The fifth joint has two spines, one at the antero-internal 

 angle, the other upon its external face. The hand is thin, 

 cylindrical, and has filiform fingers ; there is a spine above 

 the base of the movable finger and another above the 

 articulation of the fifth joint. The walking legs are 

 very compressed laterally. The fourth joint of the last 

 pair is short, almost orbicular, armed below with a 

 terminal spine and above with a spiniform tubercle ; the 

 last joint but one is elongated ; the terminal joint is long 

 and oval. 



In young males the pincers are shorter ; in females 

 they resemble the pincers found usually in the genus 

 Ncptumis ; the length of the finger is almost equal to that 

 of the palm, and these appendages are laterally com- 

 pressed, carinated, straight, and with teeth upon their 

 prehensile edge. 



Range. — West Indies; at great depths. 



