224 



BULLETIN 97, UNITED STATES NATIONAL MUSEUM. 



Chelipeds small, 4 or 5 small tubercles on carpus, a linear row of 

 three or four on upper border of palm; fingers strongly dentate. 



Second pair of ambulatory legs missing; merus of first and third 

 pairs slender, cylindrical, spinulous on the anterior portion. 



Measurements. Immature female, greatest length of carapace 6, 

 width of same 9 mm. 



Material examined. Off coast of Brazil, north of Bahia ; lat. 11 

 49' S.; long. 37 10' W.; 15 fathoms; January 18, 18T2; station 2i>5, 

 U.S.C.S. Str. Ilassler; 1 immature female, holotype (G50G, M. C. Z.). 



Fio. 134. CTMOPOLIA ACCTIFRONS, FEMALE noLorrrE, AFTER A. MILNE EDWARDS 

 AND ItocviEit. o, RIGHT FRONTAL ROKDER, X 15 (EDGE KETWEEN MEDIAN TEETU 



AND OKIIIT BROKEN) ; b, RIGHT OUTER ORBITAL ANGLE AND ADJOINING TOOTH OP 

 INFRA-OUBITAL BORDER, X 15 J C, MEDIAN PART OF FUONTAL IIOUDER, X 20 ; d, 

 LEFT I'TERYCOSTOillAN LOI5E AND CONTIGUOUS ANTENNAL PEDUNCLE, VKNTttAL 



VIEW, X 15 ; e, RIGHT EYE, FROM ABOVE, X 15. 



Family GRAPSIDAE Dana. 



Grapsolrticns MILNE EDWARDS, Hist. Nat. Crust., vol. 2, 1S37, p. C8. 

 Grapsidae DANA, Atner. Journ. Sci., ser. 2, vol. 12, ISol, p. 2S7; U. S. Expl. 



Expod., vol. 13, Crust., pt. 1, 1S52, p. 329. AI.COCK, Journ. Asiat. Soc. 



Bengal, vol. GO, 1900, pp. 2S3, 2SS, and 293, and synonymy. 



The palp of the external maxillipeds articulates either at the 

 antcro-external angle or at the middle of the anterior border of the 

 merus; exognath either very slender or very broad. Interantennular 

 septum very broad; the division of the orbit into two fossae is ac- 

 cented. 



Front of great breadth. Carapace usually quadrilateral, \vith the 

 lateral borders either straight or slightly arched, and the orbits at or 

 very near the antero-lateral angles. Buccal cavern square; there is 

 generally a gap, often large and rhomboidal, between the external 

 maxillipeds. Male openings sternal. 



Littoral, among rocks; pelagic, in drift weed and timber; inhabit- 

 ing estuaries and marshes, or rivers, rarely on land. 



