NO. 2044. NEW PHILIPPINE CRABS— RATHBtJN. 71 



sinus in the prehensile margin near the tip, teeth 9-11; dactyhis 

 strongly arched, armed with about 13 irregular teeth. Chelipeds of 

 female weak, the palm and fingers each with a well-marked ridge. 



Legs narrow; margins hairy; last 3 joints heavily fringed below; 

 a sharp, subdistal spine on merus. 



Abdomen of male subtriangular; terminal segment one and one- 

 half times as long as its middle width. 



This species is nearest to V. affinis (de Man) ^ but has a more 

 sinuous orbital margin, a different-shaped maxiUiped (exognath 

 wider, and ischiognath not widening distally), a longer, slenderer 

 carpal spine, a lobe on upper margin of hand, a gape between the 

 fingers. 



F. spinicarpus ^ has a more even carapace; less sinuous orbital 

 margin; nasal lobe with sides angled, not straight; hand without 

 a lobe above; merus-joints of legs with a small, inconspicuous spine; 

 abdomen of male narrower. 



The lateral margins of the carapace are less incurved anteriorly 

 than in V. tomentosa ^ or litterata * so that the carapace is squarer. 

 The union of the anterior with the lateral edges of the front makes 

 more of an angle than in either of those species, where the corners 

 are rounded off. 



PTYCHOGNATHUS GUIJULUGANI, new species. 



Type-locality. — Guijulugan, Negros; April 2, 1908; 2 males, 2 females, 

 adult (1 female ovig.). 



Type.— Cs^t. No. 44668, U.S.N.M. 



Dimensions. — Length of largest male, 8 mm., width 9.3 mm. 

 Length of o vigorous female 8 mm., width 9 mm. 



Associated with P. harhata at Guijulugan, were four specimens of 

 a closely allied species. 



Carapace a little broader than long, flat, regions mdistinct; post- 

 frontal tubercles well marked; the oblique portion of the branchial 

 region is separated from the horizontal portion by a fine granular 

 line m the posterior half. 



Front sinuous, prominent, half as wide as greatest width of cara- 

 pace; edge without a line of granules. 



Antero-lateral teeth 3, blimt, the first or orbital tooth the longest, 

 the last tooth very small; teeth not projecting sideways, sinuses 

 triangular. 



Upper border of orbit smuous and oblique. The antennules fold 

 nearly transversely. Epistome very narrow, almost linear; posterior 

 border crenulate. 



1 Ptychognathus affinis de Man, Zool. Jahrb., Syst., vol. 9, 1895, p. 97; vol. 10, 1898, pi. 28, figs. 21, 21a, 216. 



2 Ptychognathus spinicarpus Ortmann, Zool. Jahrb., Syst., vol. 7, 1894, p. 711, pi. 23, flgs. 13, 13?, 13fc, 13z. 

 8 Pfeffer, Jahrb. Hamburg. Wiss. Anst., vol. 6, 1888 (1889), p. 30. 



< (Fabricius) Alcock, Joum. Asiatic See. Bengal, vol. 69, 1900, p. 401, and synonymy. 



