NO. 2 MUD SHRIMPS SCHMITT I9 



together at the infero-posterior angle of the joint and not so placed as 

 to occupy the greater portion of the ventral margin as shown in the 

 picture of the variety figured by Borradaile" and referred to by 

 de Man. Measurements (in millimeters) are as follows: carpus on 

 the upper border 6 long and 8 broad at the distal margin; palm 11.5 

 on the upper margin, 9 broad at the middle, and 17.5 on the ventral 

 margin to the tip of the fixed finger ; movable finger from articulation 

 to tip 9 long. The distal border of the palm is distinctly crenulate and, 

 as in the type, is separated by a minute triangular incision from a low 

 triangular tooth which, in the case of our specimen, has its apex at 

 about a fourth of the length of the cutting edge of the finger from 

 the small triangular notch at the base to the tip ; the cutting edges of 

 both fingers are sharply cristate throughout, biting so as to about 

 impinge on the " crown " of the tooth of the fixed finger ; there is a 

 low, not very conspicuous, triangular tooth on the movable finger. 



In the smaller cheliped, the ischium is armed below with 10 instead 

 of 7 spines ; the merus has a spine as in the type ; it is here placed on 

 the inferior margin at the end of the first third, but, unlike the type, 

 shows a second spine midway between it and the infero-posterior 

 angle of the merus ; of this spine the distal half has been broken off, 

 apparently before capture. Measurements (in millimeters) are as 

 follows: carpus 6 long and 5.7 wide at the distal end; upper border 

 of the palm 7 long, the lower to the tip of the fixed finger 14, width 

 at middle 6; the distal margin of the palm is crenulate, but not so 

 distinctly so as in the larger chela, the fingers are armed much as are 

 those of the larger hand; the movable finger is about 8.8 long. 



The comb on the inner sitrface of the ischium of the third maxilliped 

 (pi. 3, fig. 3) is armed, in the distal half with 12 to 15 small sharp 

 spinuliform teeth, followed in its proximal portion by three large, 

 strong, rather widely separated spines. 



Of this more complete specimen, a male, the carapace and rostrum 

 together are about 20.7 long, the abdomen and telson together ap- 

 proximately 63; telson is about 6.2 wide at base by 5.8 long. The 

 specimen without chelipeds is a female, a little larger in size, measuring 

 not less than 88 from tip of rostrum to end of the telson. 



'■' The fauna and geography of the Maldive and Laccadive Archipelagoes, vol. 

 2, pt. 3, P- 752, pi. 58, fig. 2, 2b, 1904. 



