164 ZOOLOGISCHE MEDEDEELINGEN — DEEL IV. 



fifth the length, terminating distally in two slightly divergent pointed 

 spines. Antennal spine buttressed by a sharp carina, much longer than 

 the orbital. Carapace depressed, as broad as long, the rostrum excluded ; 

 a shallow groove extends transversely across the base of the rostrum. 

 At one-fifth the length of the carapace from the level of the orbital 

 margin one observes in the mid-dorsal line a small sharp spine, directed 

 horizontally forward and produced into the sharp, mid-dorsal carina, that 

 runs to the posterior margin but that is interrupted or quite obscure a 

 little before the middle of the carapace. Lateral sides of carapace with 

 5 sharp carinae situated on the middle longitudinal third; of these 5 

 carinae three end anteriorly in a sharp spine. The 1 st that ends in a 

 spine, placed just behind the level of the gastric spine, reaches to the 

 middle of carapace; the 2 nd , without a spine, runs behind the 1 st , curves 

 slightly inward and separates the cardiac from the branchial region; the 

 3 rd , that terminates in the hepatic spine, is situated just above the level 

 of the antennal spine and reaches as far backward as the 1 st ; the 4 th , 

 without a spine, runs, midway between the 5 th and the posterior half 

 of the 2 nd , to near the posterior margin and is separated from the 3 rd 

 by a broad interspace. The 5 th or undermost ends in a spine, is placed 

 at the level of the antennal spine and the longest of all, extending from 

 just before the middle of the carapace to near the posterior margin. 



Abdomen as in Font, incisus Kemp, telson with 3 spines at either 

 side of the acute tip, outer spine very short, the two other ones very 

 long, 3- to 4-times as long as the triangular tip and of equal length. 



Antennal scale half as long as carapace, 2,9-times as long as broad, 

 the outer edge armed just behind the middle, at four-ninths 

 its length from the base, with a strong acute spine. Anten- 

 nulae and antennae for the rest about as in Pont, incisus. 



Propodus of 1 st pair of peraeopods 3,2-times as long as wide in the 

 middle. Carpus of 2 üd pair two-thirds of the merus and a little longer 

 than the chela; palm very short, just as broad as long, measuring 

 on e -fourth the length of the chela, fingers straight. Other legs like in 

 Pont, incisus Kemp. 



The four posterior pleopods bear each an appendix interna both in the 

 male and in the female, in the male it is styliform with cincinnuli at 

 the apex, in the female broader, without cincinnuli at the rounded 

 tip ; 2 nd pleopod of the male presenting moreover on the middle of the 

 inner margin of the endopodite a truncated prominence, the appendix 

 masculina. Both in the male and in the female the endopodite is devel- 

 oped in the four posterior pleopods, but it gradually diminishes 

 in size from the 2 nd to the 5 th . 



