DESCRIPTIONS OF NEW SPECIES OF CRABS OF THE 

 FAJVilLIES GRAPSID.E AND OCYPODID^E. 



By Mary J. Rathbun, 



Assistant Curator, Division of Marine Invertebrates, United States National Museum. 



Four new species of Indo-Pacific crabs from various sources are 

 here described. They are additional to those included in special 

 faunal reports now in preparation A similar paper was published 

 as No. 1971 of these Proceedings. 



Family GRAPSID.E. 



ERIOCHEIR LEPTOGNATHUS, new species, 



Plate 33, figs. 2 and 3. 



Type-locality. — Shanghai, China; received from E. Deschamps; 1 

 female, immature. 



Type.— Cat. No. 45567, U.S.N.M. 



Dimensions. — Type female, length 10.6 mm., width 11.6 mm. 



The single specimen has been dried. Surface much more even 

 than in the species already known; postfrontal and pregastric lobes 

 shghtly marked; a finely granulate ridge a little concave forward 

 runs inward from the third lateral tooth; carapace bordered by a 

 raised granulate line; front short, 3-lobed, middle lobe broad and 

 straight (not emarginate) at the middle. 



Antero-lateral margin arcuate, tridentate; the first or orbital tooth 

 the longest, rectangular, separated by a U-shaped notch from the 

 second tooth which is acute-angled and sharp; third tooth smaller, 

 acute. The line forming the upper border of the decUvous postero- 

 lateral area is sinuous and does not quite reach the posterior margin; 

 postero-lateral margins slightly convergent. 



Ischium and merus of outer maxilUpeds narrower and longer than 

 in other species; gape con'espondingly wider. No tooth on upper 

 margin of arm; an acute tooth at inner angle of wrist; no hair on 

 outer surface of palm; fingers tapering regularly to the slender tips. 



The menis joints of the first three legs have an acute subdistal tooth; 

 on the last leg the tooth is rectangular and inconspicuous. 



Proceedings U. S. National Museum, Vol. 46— No. 2030. 

 95278°— Proc.N.M.vol.46— 13 23 353 



