28 SESARMA ROCOURTf. 



8. Sesarma bocourti, Alph. M. Edw. 



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

 let. p. 28. 



Though Mr. Milne Edwards's description is again very 

 short and imperfect, I will however refer a specimen of our 

 collection to this species. Moreover I will give a more extensive 

 description of it. Our specimen, a male, has a rather re- 

 gular tolerably convex carapace, which is somewhat hairy 

 and covered, at least anteriorly, with oblique wrinkles; 

 the branchial regions also are a little covered with small 

 hairs. The lateral margins are parallel and the regions 

 are defined by rather deep grooves. Front vertically de- 

 flexed with a slightly emarginate anterior margin. Post- 

 frontal lobes tolerably prominent and sharp , not rounded , 

 the external ones being but a little narrower than the 

 median ones. There is another second smaller tooth be- 

 hind the external orbital angle. Penultimate joint of the 

 abdomen more broad than long; the sides of the abdo- 

 men being rather a little convex. Anterior legs very cha- 

 racteristical : the upper margin of the arm without a spine 

 at its distal end, the inner margin toothed and the outer 

 surface rugose; upper surface of the wrist granulated, its 

 inner margin not being denticulate; Jiands very high ^ com- 

 pressed and distorted , their outer surface being concave with 

 a rather sharp granulated lower margin; the whole outer 

 and inner surface of the hands and of the mobile finger 

 closely granulated, the inner surface without a granulated 

 ridge. Ambulatory legs short , with tolerably enlarged me- 

 ropodites, the last joints but little hairy. 



Breadth of carapace 24 mm., length 21 mm. 



Our specimen was collected at the island of Borneo , 

 that of Milne Edwards at Bangkok (Siam). 



9. Sesarma bidens,, de Haan. 



Grapsus , P achy soma , bidens de Haan , Fauna Japon. 



^otes from tjie Leyden Miuseuzn, Vol. II. 



