ltj<i SESA.RMA INDICA MII.NE EDWARDS. 



wholly agree in both species. Distance of the external 

 orbital angles: 29 ^j m.m. 



Length of the carapace : 26 ram. 



Length of the hands: 27 m.m. 



22. Sesarma indica Milne Edwards. 



Sesarma indica, Milne Edwards, Histoire Naturelle des 

 Crustacés, Tome II, pag. 74. (1837), and Annates Scienc 

 Naturelles, III Série, Tome XXi«ni.= (1853), p. 186, 187. 

 Nee Sesarma indica, Heller, Novara-Reise , pag. 64, 65. 



It is much to be regretted, that many of the descrip- 

 tions given by Mr. H. Milne Edwards both in the „His- 

 toire naturelle," and in the »Annales des Sciences natu- 

 relles ," are very short sothat it is nearly impossible to 

 recognize the species that are described by him. 



To these imperfectly known species also belongs the 

 Sesarma indica Milne Edwards , though already descri- 

 bed before almost half a century. — In his ))Novara- 

 Reise," Prof. Heller has identificated a crab from Ceylon 

 and the Nicobares with this Sesarma, but as I beHeve, 

 very unjustly , for his crab rather appears to me to be- 

 long to oue of the species of the subgenus Metagrapsus. 



I therefore venture to give a new description of the 

 Sesarma indica Milne Edwards , based upon the investi- 

 gation of three individuals in our Museum (2 Q , 1 (ƒ ) . 

 one female being found at the Isle of Sinkel by Mr. D. 

 P. Jentink , the other two specimens being from an un- 

 known locality, though in every case also from the Indo- 

 Malayan Seas. 



The quadrangular surface of the rather thick cephalo- 

 thorax is much convex longitudinally , like also somewhat 

 laterally ; it is broader than long , the ratio of the dis- 

 tance of the external orbital teeth to the length of the 

 carapace being as 10 : 9. The protogastrical lobes are 

 separated by rather deep smooth grooves , the middle one 

 being also very broad ; the two internal protogastrical 



Notes from the Leyden IMuseum , "Vol. "V. 



