NO. 2044. NEW PHILIPPIXE CRABS— RATHBUN. 77 



Dimensions. — Male, length of carapace 9.6 mm., width at epibran- 

 chial tooth 11.4 mm., width at anterior angles 11.2 mm., width at 

 posterior angles 10.7 mm., width of front 7.2 mm., height of front 1 

 nun., length of third ambulatory leg 6.5 mm., width of same 2.9 mm. 



Distinguished by the sUghtly marked frontal lobes and the well- 

 defined upper surface of the palm. 



Carapace sensibly wider than long, wider anteriorly than poste- 

 riorly, widest at the single epibranchial tooth, lateral margins a Httle 

 concave; surface everywhere punctate, mesogastric region defined, 

 as is also the posterior cardiac lobe; obHque lateral fines few, about 

 seven, the anterior of these crossing the epibranchial tooth. Front 

 very wide, widening below, superior lobes separated by shallow fur- 

 rows, the lateral ones very short; outer lobes a fittle narrower than 

 inner; surface of front nearly vertical, lower margin arcuate, although 

 nearly straight at the middle. Upper margin of orbit directed very 

 obfiquely backward to the short and sfightly advanced orbital tooth; 

 next tooth subrectangular. 



Maxilfipeds widely gaping, the merus joints obfiquely transverse. 

 Chefipeds of male unequal; outer surface of arm, wrist, and proximal 

 half of pahn crossed by fine granulated rugae which on the middle of 

 the palm are longitudinal; no spine on upper margin of arm, only a 

 blunt angle; inner margin sparingly denticulate and with a shaUow 

 rounded prominence; no tooth at inner angle of wrist; chelae punc- 

 tate; upper surface of palm flattened, fimited outwardly by a smooth 

 blunt ridge and inwardly by an uneven granulated margin; a trans- 

 verse fine of granules inside pahn, otherwise surface nearly smooth. 

 Fingers moderately gaping; the horny extremity embraces the sub- 

 terminal tooth on each fimger; upper margin of dactylus with a line 

 of four distant spinules; lower margin of unmovable finger straight 

 except at tip; prehensUe edges irregularly toothed, three teeth on 

 each finger enlarged. 



Ambulatory legs of moderate length; carpal and propodal segments 

 densely hairy. 



Abdomen of male narrow, with a large terminal segment which is 

 nearly as wide as long. 



Resembles the very briefly described S. losve A. Milne Edwards * 

 in its smooth shimng carapace, but the carapace is narrower than in 

 loeve (where it is 7 mm. X 10 mm.), and the front has not a straight 

 margin. 



The carapace has considerable resemblance to that of S. semperi 

 Burger,^ but the legs are shorter, the palm has no transversely ob- 

 lique ridges above, and the movable finger is very feebly ornamented 

 on the upper margin, instead of having stout tubercles. 



1 Nouv. Arch. Mus. Hist. Nat., Paris, vol. 5, 1869, p. 27. 



2 Zool. Jahrb., Syst., vol. 7, 1893, p. 630, pi. 21, fig. 1. 



