's RIJKS MUSEUM VAN NATUURLIJKE HISTORIE ^ LEIDEN. 95 



scale extends far beyond the antennal peduncle, which it does conceal 

 entirely. 



It appears to me probable that Enopl. longirostris will once prove to 

 be the young of a still unknown species, for it differs too mucli from 

 Enopl. occidentalis or pictus to be considered as a young of these two. 



Processa Jacobsoni n. sp. 



1 male, collected February 1913 by Mr. E. Jacobson at Sinabang, 

 island of Simalur, near the west coast of Atjeh, Sumatra. 



Kostrum a little more than half the length of the rest of the cara- 

 pace, reaching beyond the eyepeduncles almost to the distal extremity 

 of basal antennular article; the upper border runs at first straight, though 

 slightly ascending, forward, terminating in an acute tooth that almost 

 reaches to the anterior border of the eyes; between this tooth that 

 measures about i / u the entire length of the rostrum and the acuminate 

 apex of the latter the upper border appears slightly concave; at the level 

 of the apex of the acute tooth the height of the rostrum measures 1 j 8 

 the length, near the base the height is l / l0 the length. Carapace of a 

 stout shape, the height being about half the length, the rostrum in- 

 cluded. 



Abdomen a little more than twice as long as the carapace. Lower 

 border of 5th somite terminating posteriorly in a small acute tooth. 

 Telson tapering rather much, at base almost 3-times as broad as at the 

 tip, distance between the anterior pair of dorso-lateral spinules and the 

 base of the telson a little more than one- fourth the entire length; 

 posterior pair a little farther distant from the anterior pair than 

 from the acute posterior extremity of the telson. 



Eyes hardly reaching beyond the middle of the strongly excavated 

 basal joint of the antennular peduncle. 



Second joint of antennular peduncle five times as long as thick in 

 a lateral view, 3rd joint almost half as long as second, the peduncle 

 as much shorter than the antennal scale as the 3rd joint is long. 



Legs of 1st pair slender. Merus of right chelate leg 6-times as 

 long as wide in the middle, carpus two-fifths of the merus, almost 3- 

 times as long as thick distally; chela two-thirds the length of the merus, 

 slender, almost five times as long as wide in the plane of the fingers, 

 fingers about half as long as the palm. Merus of the left simple leg 

 6,5-times as long as wide in the middle, carpus 4-times as long as thick, 

 propodus one and a half as long as the carpus, strongly tapering, 

 eight times as long as wide in the middle, dactylus one-fourth of the 

 propodus. 



