'•IA SESARMA ROTUNDIFRONS. 



external orbital angle ; branchial regions with several obli- 

 que lines. Anterior legs equal in size; arm with a liitle 

 developed tooth at the distal end of its upper mar^n, 

 lower margin somewhat toothed. Outer surface of the wrist 

 rugose and granulated, with a tolerably sharp spine it the 

 inner angle. Outer surface of the hands smooth , A^ith a 

 minutely denticulated marginal ridge on the upper margin 

 and a little distinct small smooth ridge on the middle of 

 the external surface ; inner surface of the hands granula- 

 ted. Upper margin of the mobile finger with 1? — 15 ob- 

 tuse spiniform tubercles. Ambulatory legs short and broad, 

 with very enlarged meropodites. Penultimate abdominal 

 joint of the male much more broad than long. 



5. Sesarma rotxcndi frons Alph. H. Edw. 



Alph. Milne Edwards, Nouv. Arch, du Mus. t. V. Bul- 

 letin , pag. 30. 



A male specimen , collected at the islaad of Xulla-Bessy 

 and a female found by Messrs Pollen aid van Dam at the 

 island of Nossi-Be, near Madagascar. 



Description of the male Xulla-Bessy specimen: 



Carapace more broad than \o\\q , verii convex longitudinally, 

 regions little distinct, separated by shallow grooves; post- 

 frontal lobes rounded , scarcely prominent , the fi'ont not 

 being covered by them when looked at from above. Front 

 nearly vertically deflexed with two obtuse lobes, separated 

 by a wide median sinus ; internal orbital angles sharp , acu- 

 minate. Numerous transverse tufts of hair upon the an- 

 terior part of the surface of the carapace ; branchial re- 

 gions also a little hairy. Carapace somewhat broader ante- 

 riorly than posteriorly ; the lateral margins a little arched ; 

 behind the acute external orbital angle another second pro- 

 minent tooth. Penultimate joint of the abdomen rather 

 more long than broad. Anterior legs almost equal in size ; 

 upper margin of the arm entire, without tooth; lower 

 margin arched and subtilly denticulate. Outer surface of 

 Pïotee» from tlie Leyden Museum, "Vol. II. 



