392 ME. J. E. HENDERSON — A CONTRIBUTION 



This species is not uncommon in the above locality, found running about in grass, and 

 living in company with Metasesarma Hotissecmxll. The spinules on the meropodites of 

 the ambulatory legs vary in number in different specimens, and sometimes even on the 

 two sides of the same specimen. In the Ennore examples the ambulatory legs are without 

 hairs, whereas in those from Mergui examined by De Man they were hairy on the terminal 

 joints. 



The largest specimen has the carapace 11 mm. long and 15 mm. wide. 



Distribution. Bombay {Milne-Edioards) ; Mergui [De Man). 



Genus Sesarma, Say. 



158. Sesarma tetragona (Fabr.). 



S. tetragonum (Fabr.), A. Milne-Edwards, Nouv. Arch. Mus. Hist. Nat. t. ix. p. 304, pi. xvi. fig. 4 

 (1873). 



Madras, very common on the banks of the Cooum ; Ennore (/. B. H.). 



The carapace is densely pubescent, especially in front, and the hairs are arranged in 

 tutts ; a single tooth is placed behind the antero-lateral angle. The upper margin of the 

 hand carries a narrow longitudinal ridge which is finely striated transversely, and the 

 outer surface of the same joint is finely granulated, with a short ill-defined line of granules 

 about the middle of the surface ; the dactylus is armed above with ten or eleven horny- 

 tipped tubercles. 



An adult male has the carajoace 36 mm. long and 10 mm. wide, the right hand and 

 immobile finger 10 mm. long and 21 mm. in height. 



Distribution. From the Red Sea, E. Africa, and Natal to China and the Pacific (New 

 Caledonia, Fijis, &c.). 



159. Sesarma quadeata (Fabr.). 



S. quadratum (Fabr.l, Miers, Phil. Traus. Roy. Soc. vol. clsviii. p. 190 (1879). 



(= (S. affinis, De Haan; S. imgulata, Milne-Ed w. ; S. asjjera, Heller). 



Tuticorin {Thurston). Very common at Madras and Ennore (J. JR. S.). 



The Tuticorin examples belong to the typical form ; the carapace of a male is 17'5 mm. 

 long and 21 mm. wide, and there are eleven tubercles on the uj)per margin of the 

 immobile finger. The Madras and Ennore examples belong to the variety aspera of 

 Heller, and the largest male that I have met with is only 15'8 mm. long and 19'5 mm. 

 wide. On examining a large series of adult males I find from thirteen to eighteen 

 tubercles on the immobile finger ; as a rule each tubercle is oval and symmetrical, but in 

 one or two specimens they are each slightly curved. S. Melissa, De Man, founded on a 

 single specimen from Mergui, with the tubercles horse-shoe shaped, may therefore be 

 only a variety of S. quadrata. Tufts of hair are sometimes present on the postfrontal 

 lobes. 



Distribution. From E. Africa and Natal to Japan and the Pacific (New Caledonia, 

 Fijis). 



