295 



242 



Fig. 120. Cyllopus lucasi Bate. 



The head is large, its length in females exceeding that of the first 

 three somites of the pereon and in males the first four somites; the height 

 of the head is barely more than its length and the dorsal side slightly 

 convex; a small, roundish-triangular rostrum is present. In antennae I the 

 constricted distal part of the flagellum in females is 1/2-1/3 the length of 

 the flagellum, in males somewhat longer. Antennae II are six- to seven- 

 segmented and in males about equal to antennae I in length, in females 

 sometimes shorter. 



The 2nd segment of pereopods I is equal in length to the rest of the 

 leg, twice longer than its maximum width, and with smooth margins; the 

 4th segment bears many spiniform setae on the small distal lobe of the 

 posterior margin; the 5th segment broadens distally, its length equal to its 

 maximum width, its posterior margin broadly protruding backward and 

 up to 1/4 the 6th segment forms with it a weak chela; the 6th segment 

 is narrower and shorter than the 5th, its anterior distal angle protruding 

 slightly; the posterior margin of the 5th-6th segments is denticulate while 

 the anterior margin bears solitary spiniform setae; the claw is about 

 2/3 the length of the 6th segment and denticulate posteriorly. The 2nd 

 segment of pereopods II is longer than the rest of the leg and has parallel 

 margins; the 4th segment has a large broad lobe extending to 3/4 the 

 5th segment and bordered with strong spiniform setae; the 5th segment, 

 without the process, is 1.5 times longer than its width in the distal part, 

 while the process extends to the end of the 6th segment; the inner side 



