182 DE. J. &• DE MAN ON THE PODOPHTHALMOTJS' 



I have elsewhere pointed out that specimens of this species 

 in the Ley den Museum had been labelled, by the author of the 

 ' Fauna Japonica,' Grapsus (PacJiysoma) fascicularis and S. 

 tetragona, whereas these forms are perfectly distinct. 



Sesarma tceniolata has been collected on the Philippine Islands, 

 and in the seas of Celebes, Java, and Borneo. 



100. Sesaema inteemedia, de Haan. 



Grapsus (Pachysoma) intermedius, de Haan, Fauna Japonica, Crust. 

 p. 61, pi. xvi. fig. 5. 



Sesarma intermedia, Milne-Edwards, Ann. Sci. Nat. 3" serie, t, xx. 

 p. 186 ; de.Man, Notes from the Leyden Museum, vol. ii. p. 25. 



Thirteen very young specimens were collected (7 c5' , 6 5 ), nine 

 of which were captured in the mangrove-swamps of Zediwon. 



Sesarma intermedia, de Haan, and S. sinensis, M.-Edw., are 

 two closely allied species inhabiting the same seas. Perhaps 

 they may prove to be identical. I have before me a typical 

 specimen of 8. sinensis, M.-Edw., from the Paris Museum; but 

 I have not been able to compare the Mergui specimens with the 

 unique type of S. intermedia ia the Leyden Museum, as the rules 

 of the Museum did not admit of its being sent to me. The 

 thirteen specimens undoubtedly belong to a differeat species 

 from S. sinensis, and I am inclined to regard them as repre- 

 sentatives of S. intermedia. 



Sesarma intermedia and S. sinensis are to be placed along with 

 those species of this section in which the distance between the 

 extraorbital teeth is greater than the length of the cephalo- 

 thorax, and in which the upper and anterior margius of the arms 

 of the anterior legs are unarmed ; they are therefore allied to 

 Sesarma tetragona, M.-Edw., and S. rotundifrons, but they may 

 be distinguished by their less enlarged, more quadrate, and more 

 depressed cephalothorax. 



The cephalothorax completely resembles that oi S. sinensis; it 

 is nearly quadrate, the proportion of the distance between the 

 extraorbital teeth to the length being as 9 : 8 in both species ; 

 the upper surface is rather depressed, and the lateral margins 

 are parallel to one another. The front, however, is a little 

 narrower in S. sinensis, the proportion of the distance between 

 the extraorbital teeth to the breadth of the front being as 

 11 : 6, and in these specimens as 11 : 7. As regards the form 



