1900.J rfioM singapoee aad Malacca. 765 



another ; but the cardiac region is always more or less distinct, 

 and the hepatic regions always project slightly in a lateral and 

 obliquely downward direction, so as to break the plane of the 

 antero-lateral margins. 



Dim. d 14-5x15. J 13-75x13-5. tf 12-5x13. rf 13x13. 

 o* 10-5x10-5. <f 9-75x10. 6 12-5x12-75. <$ 13x12-75. 

 $ 15-25x15. $11-5x11-5. $11-5x11. $9x9. $13x13. 

 $ 11-5x11-25. 



105. Philyba sexangula Alcock. 



Philyra sexangula, Alcock, Journ. As. Soc. Bengal, vol. lxv. 

 pt. ii. No. 2, p. 241, & pt. ii. No. 3, pi. vii. f. 2 (1896). 



Hob. Singapore : from mud, at low water. A female with ova. 



Mr. Alcock's description is from a male ; in this female I note 

 the following differences : — The median carina is raised into four 

 low tubercles over the cardiac and nasogastric regions ; the teeth 

 at the outer edge of the posterior margin are not very strong ; the 

 black colour of the carapace shades off to a dull yellow-green in 

 the anterior half, commencing at the anterior termination of the 

 branchial carinas ; the finger-tips are white, and the four posterior 

 pairs deep yellow. 



As regards the abdomen, it is composed of three distinct pieces : 

 a narrow basal segment ; a long, broad, dome-shaped median piece, 

 composed of segments 2 to 6, segment 2 being still clearly marked 

 off by a transverse groove ; and the 7th segment, very small and 

 rounded triangular. Segments 1 and 2 are obtusely carinated 

 transversely ; the whole abdomen is honeycombed and pubescent 

 like the carapace, and uniformly black, except the 7th segment 

 and the anterior and lateral margins of the middle piece, which 

 are nearly white. 



Dim. 9-75x9-5. 



Length of middle piece of abdomen. . . . 7-0 mm. 

 Breadth ,, „ „ .... 6-0 „ 

 Length of chelipede 20-5 „ 



LV1II. Genus Pseudophilyea Miers. 



106. Pseudophilyea melita de Man. 



Pseudophilyra melita, de Man, Mergui Crust, p. 199(1888); 

 Henderson, Trans. Linn. Soc, Zool. vol. v. p. 397 (1893); Alcock, 

 Journ. As. Soc. Bengal, vol. lxv. pt. ii. No. 2, p. 253 (1896). 



Hub. Uncertain. One female. 



I have no doubt that this specimen belongs to P. melita ; but 

 the following — possibly sexual — differences may be noted. The 

 surface of the carapace is nowhere granular, but everywhere fairly 

 closely punctate, the punctse being distinct, and quite visible to the 

 naked eye. The distal third of the upper and under surfaces of 

 the arm, and the wrist, both above and below, are also punctate, 



Peoc. Zool. Soc— 1900, No. L. 50 



