72 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. 47. 



The maxillipeds are situated a considerable distance back of the 

 edge of the buccal cavity. 



Exognath broader than iscliiognath in both sexes, more so in male 

 than in female; ischiognath with subparallel sides; antero-external 

 lobe of merognath very broad. 



In the male the inner angle of the wrist is rectangular, not toothed ; 

 hand massive, with a squarish patch of hair at the distal end, which 

 is continued part way on the fingers. The dactylus is a little more 

 than twice as long as the upper margin of the palm, is finely toothed, 

 and when closed leaves a gap between it and the horizontal fixed 

 finger; the latter has fewer teeth, 2 or 3 of which near the middle are 

 large. In the female the wi'ist bears an equilateral, acute tooth at 

 its inner angle, the chela is weak, with a well-marked granulate ridge 

 above the lower margin, and grooved fijigers; near the tips there is 

 on the inner and outer surfaces a row of short hau's which are appressed 

 against the horny tips. 



Legs rather narrow; no spine on meropodites; last 2 joints moder- 

 ately hairy; the second and third pairs are about one and tliree- 

 fomi-hs times, the last pair one and one-fourth times, the length of 

 the carapace. 



Differs from P. harbata ^ in having the carapace a little narrower; 

 front more advanced and less deflexed, lacking the double row of 

 granules in that species; upper line of orbit more oblique and more 

 sinuous; epistome about half as wide; distance between epistome 

 and maxillipeds greater; in the male the exognath is wider, ischiog- 

 nath narrower, and lobe of merognath larger, than in harbata; these 

 characters are present, though less marked, in the female ; inner angle 

 of wrist of male squarer, inner distal margin of wrist shorter, so that 

 upper surface of wrist is more oblong than in harbata (this differ- 

 ence less evident in female); in the presence of a row of short hairs 

 about the ends of the fingers in the female. 



Subfamily SESAItlVLIN-.^:. 

 SESARMA (SESARMA) PALAWANENSE, new species. 



Type-locality. — River, Nakoda Bay, Palawan Island; December 31, 

 1908; 3 adult females, 1 of which is ovigerous. 



Type.— Cat. No. 45792, U.S.N.M. 



Dimensions. — Female, length of carapace 39.6 mm.; width between 

 orbital angles 41.8 mm.; width between epibranchial teeth 40.5 mm.; 

 width between posterior angles 36.7 mm.; width of front, 20.3 mm. 

 Length of propodus 25.6 mm.; length of palm, between articulations, 

 9 mm.; length of dactylus, upper margin, 17.6 mm. 



>(A. Milne Edwards) de Man, Zool. Jahrb., Syst., vol. 9, 1895, p. 105, and synonymy; vol. 10, 189S, 

 pi. 28, fig. 23. 



