22 SKSARMA I'ICTA A>fD SESAU.\[A AFFINIS. 



iuferior margin ol the arm a little dentate, upper margin 

 entire; upper surface of the wrist granulated, inner angle 

 not toothed ; hands swollen up , with a large tubercle on 

 the granulated external surface ; upper surface with an ex- 

 ternal marginal ridge and several abrupt short ridges more 

 internally ; inner surface also a little granulated , upper mar- 

 gin of the mobile finger provided with numerous minute 

 teeth. Ambulatory legs very slender, especially the mero- 

 podites; the three last joints, especially the slender dacty- 

 lopodites , somewhat hairy. Penultimate joint of the male 

 abdomen more broad than long. These specimens have been 

 collected by Mr. von Rosenberg at Andai in New-Guinea. 



The Museum contains still another specimen, collected 

 at Amboina , a male , somewhat smaller than the preceding 

 ones. This specimen agrees completely with the described 

 forms, but the small teeth behind the external orbital an- 

 gle are more distinctly developed; the front, though as 

 narrow with regard to the breadth of the carapace , is how- 

 ever deeper in proportion to its breadth and has a con- 

 vex anterior margin. I think this specimen to be only 

 a variety of Sesainna gracilipes. 



Width of the carapace 12^/2 mm., length 11 mm. 



2. 3. Se sarina piet a de Haan and Sesarma 

 a f Jin is de Haan. 



De Haan, Fauna .Japonica, Crustacea, pag. Gl and 66. 

 Milne Edwards, 1. c. pag. 183 and 184. Hilgendorf, in 

 »Baron von der Decken's Reisen in Ost-Afrika", Crustac. 

 pag. 90. 



Mr. Hilgendorf thinks these species not only to be identical 

 with one another , but also with Sesarma quadrata Fabr. ; it 

 may be possible that either of them may be identical with 

 the Ses. quadrata , though I think it improbable , but the two 

 Japanese species are certainly different. Sesarma picta de 

 Haan has a quadrate carapace , as broad anteriorly as pos- 

 teriorly ^ icith parallel, nearly straight lateral margins ; front 

 Notes from tlie Ley den ]M!uiseu.ixi, "Vol. II. 



