NO. 2ir.r.. NEW nilLIPPINE CRABS— RATHBUN. 529 



PLATYMAIA BARTSCHI, new species. 



Type-locaUtij. — China Sea, off southern Luzon: Matocot Point, 

 S. 50° E., 5.10 miles; kt. 13° 41' 20" N.; long. 120° 58' E.; 198 

 fathoms; M. S.; July 24, 1908; station 5297, AlJjafross. 



llolofype.— Male. Cat. No. 47319, U.S.N.M. 



Measurements. — Length of carapace (tip of median rostral spine 

 broken off), 74.2; width of same, 69.7; distance between tips of 

 outermost spines of orbit, 28; length of cheliped, 148.6; of arm, 

 02; of manus (upper edge), 40.3; height of manus, 21.3; length of 

 first leg, 310; merus, 111.3; propodus, 102; dactylus, 64; length of 

 second leg, 275; merus, 103.7; propodus, 74; dactylus, 61.3; length 

 of third leg, 245; merus, 91; propodus, 63; dactylus, 55; length of 

 fourth leg, 225; merus, 84.5; propodus, 59; dactylus, 51.5; greatest 

 width of dactylus, 4.9; greatest width of dactylus in distal half, 

 2.8; width of merus at middle, 8.5. 



Carapace subcircular, as broad as long except for the median 

 rostral spine, nearly smooth. Interantennular spine or median spine 

 of rostrum nearly twice as long as lateral spines and less ascending; 

 spines rather slender and n cumin ate. A row of spines on subhepatic 

 and subbrancliial regions. 



Eye retractile against the upper of the two suprahepatic spines. 

 Eye-stalks short, eyes very large, cornese chiefly ventral. Antennte 

 slender, about one-third length of carapace; basal joint of peduncle 

 free. Merus of external maxillipeds about half as wide as ischium, 

 bearing the coarse palp at summit ; both large joints spinous. 



Chelipeds spinous, twice as long as carapace and stouter than the 

 legs, especially as regards the palm. The latter has a double row of 

 spines above and below, a single row inside. The lower row is con- 

 tinued on the immovable finger by one or two spines. Proximal half 

 of dactylus spinulous above. 



Legs long and fiat, those of first pair about four and one-fourth 

 times length of carapace ; posterior edge with a single row of spines, 

 anterior edge with a double row of spines, which are xerj long on 

 propodus and dact^dus; propodus about one and two-thirds times 

 as long as dactylus. Legs of second and third pairs have front edge 

 of merus spinous, those of second pair have front edge of propodus 

 spinous and hinder edge spinulous. All the merus joints have a spine 

 at end of hinder edge; last three dactyli twisted at middle, Avhere 

 they are strongly narrowed, then widen again before tapering to the 

 horny tip ; this last is longer than Avide. 



Abdomen seven-jointed ; first tergum has three spines, remaining 

 terga have small tubercles. The thoracic sterna bear a few spinules, 

 as also do the epimeral plates corresponding to the third and fourth 

 trunk legs. 



10600°— rroc.N.M.vol..50— 16 34 



