Distance between external orbital angles. 
Length of carapace. . . ig silat th ysh yaar t He 
Breadth of front (at upper ein 
Posterior margin of carapace. 
Horizontal length of ate See eee? 34 Sea ak > 
Height of palm . . APS ot oie | 28h pisr Lalas ae 
Length of movable aneees ; 
s RUIKS M MUSEUM | VAN NA PUURLIJKE HISTORIE - — LEIDE N. 227 


in a regular way (in the single 9 of Cl. merguiense small patches of hairs 
are observed on ‘the anterior part of the carapace, much more numerous 
and rather irregularly disposed), by the lateral postfrontal lobes being 
subdivided, by longer propodites and shorter dactyli of the walking legs, 
and by some differences in the abdomen of the ©. From the species of 
Milne-Edwards it is equally distinguished by the latter character, by the 
regular curve of the upper orbital border, being not convex in its inner 
half, and by the same differences in regard to the walking legs. 
Dimensions: 
. . e 
fh peek peek 
Or ot 
— 
CO 
SO A ODO ns: 
— 
bo 
ON 
bo 
ei | 
Or aa 1 
On 
bo 
i | 
ce) 
or 
~1 D> nr 
WH OH OO DIO GO RIO 
| 
So ey 
a] 1 1 
or Ot 


Length of meropodite —|} 14.— 
Breadth , ¥ of penultimate —|, 5.25 4.— 
Length ,, carpo- + propodite { pair of legs EE ay ena 
5 » dactylus — —') 4.5 
rieicr margin of 3th (antepenultimate) segment of abdomen 5.75\ = — — 
Length of 5th (antepenultimate) segment of abdomen 1.90} a — 
Posterior margin of 6th (penultimate) segment of abdomen SOW ie om _ 
Length of 6th (penultimate) segment of abdomen 1.85 pee — 
Base of last segment of abdomen 2.35) — —— 
Length of last segment of abdomen 2.66/ -— — 
N°. 1 and 2 are ,Siboga” specimens from the Talaut Archipelago (n°. 2 is 
adult, with numerous, small ovae beneath the abdomen), n°. 3 is from Nias. 
IJ. Habits and Distribution. 
The few and scanty notes scattered about in the literature concerning 
the habits of the species we are here dealing with, indicate that the latter 
in the vast majority inhabit mangrove swamps, mouths of rivers and 
brooks and are even normally found in fresh water, far from the sea and 
high up into the country. Though not bound so strictly to fresh water 
as the true river crabs (Potamonidae), they nevertheless ascend rivers 
and brooks, may leave the water and wander about on land, where many 
1) Absent in the specimen. 2) Measured under the microscope. 
mm. 
