NO. 1876. ON THE CRUSTACEAN ORDER CUMACEA—CALMAN. 



617 



pleural plates o:reatly expanded. The abdomen is stout and lonojer 

 by about one-fifth than the cephalothoracic region. 



The antennules rather short and stout, the first segment of the 

 peduncle longer than the second or third, which are subequal; the 

 outer flagellum hac two segments and is hardly longer than the last 

 segment of the peduncle; the inner flagellum is unsegmented and 



Fig. H.— Leptocuma minor, female, from the side. 



half as long as the first segment of the outer. The antennae consist 

 of three segments, the terminal one bluntly conical and twice as long 

 as it is wide at the base. The mandibles are of normal form, the por- 

 tion proximal to the molar process being nearly twice as long as 

 that distal to it; there are only about six spines, and there is a lacinia 

 mohilis on the left mandible. The 

 palp of the maxillula has two setae. 

 The branchial apparatus has about 

 seven broad, flattened, marginal lob- 

 ules arranged in a straight row, and 

 a very large reflexed lobule. The 

 third maxilliped has the basis slightly 

 produced at its outer distal corner. 



The first legs are short; the basis 

 is a little longer than the distal seg- 

 ments together; the propodus is equal 

 to the carpus and longer than the 

 dactylus; there is a group of long 

 setse at the distal end of the inner 

 edge of the propodus. The second 

 legs have the basis a little shorter 

 than the distal segments together; 

 the carpus is a ver};' little longer than 

 the merus; the propodus is a little 

 longer than the dactylus and together with it a little longer than the 

 carpus. The third legs have a well-developed exopod. The fourth 

 legs have a vestigial exopod of two segments, the distal one very 

 minute. 



The peduncle of the uropods is nearly IJ times as long as the last 

 somite and bears a series of unequal spinules on the inner edge. The 

 endopod is about four-fifths as long as the peduncle, its proximal seg- 



15 IC 



Fig. 15-lG.— Leptocuma minor, female. 15, 

 Third maxilliped; 10, first leg. 



