142 RATHBUN 



CALLINECTES MARGIN ATUS (A. Milne Edwards). 



Neptunus marginatus A. Milke Edwards, Arch. Mus. Hist. Nat. Paris, x, 



318, pi. XXX, fig. 2, 1861. * 



Callinectes larvatus Ordway, Boston Jour. Nat. Hist., vii, 573, 1863. 

 Caliifiecfes marginatus Rathbun, Proc. Biol. Soc. Washington, xi, 149, 



1897, and synonymy. 



Mamanguape stone reef ; four young. 



Rio Goyanna stone reef ; one male. 



Rio Parahyba do Norte, on mangroves ; two young. 



Pernambuco stone reef; one male. 



Maceio coral reef; four males, one young female. 



Color. — Dull brown, with areas of bluish black ; claw brown above, 

 blackish blue below and on the inner side ; last segments of swim- 

 ming feet a brighter brown. 



AREN^US CRIBRARIUS (Lamarck). 



Portunus cribrarius Lamarck, Hist. Nat. Anim. sans Vert., v, 259, 1818. 

 Arenaus cribrarius Dana, Crust. U. S. Expl. Exped., i, 290, 1852 ; atlas, 

 pi. xviii, fig. 2, 1855. 



Mamanguape stone reef ; one male, two females. 



Family MAIID^. 



ACANTHONYX PETIVERII Milne Edwards. 



Acanthonyx petiverHyiws^^ Edwards, Hist. Nat. Crust., i, 343, 1834. 

 Acanthonyx petiveri h.. Milne Edwards, Crust. Reg. Mex., 143, pi. xxvii, 

 fig. 7, 1878, and synonymy. 



Mamanguape stone reef ; one female. 

 Boa Viagem stone reef ; one female. 



MICROPHRYS BICORNUTUS (Latreille). 



Pisa bicornutct\jci.\xe-\\\Q, Encyc. Meth., Hist. Nat., Insectes, x, 141, 1825. 

 Microphrys bicornutus A. Milne Edwards, Nouv. Arch. Mus. Hist. Nat. 



Paris, VIII, 247, 1872 ; Crust. Reg. Mex., 61, pi. xiv, figs. 2-4, 1875, ^^^ 



synonymy. 



Mamanguape stone reef ; two males. 



Pernambuco stone reef at Ilha de Nogueira ; two males, four fe- 

 males. 

 Maceio coral reef ; five males, five females. 



MITHRAX VERRUCOSUS Milne Edwards. 

 Mithrax verrucosus '^llv.^v.Y.MWKYiXiS, Mag. Zool., 11, pi. iv, 1832. 

 Mamanguape stone reef ; one young. 

 Pernambuco stone reef at Ilha de Nogueira ; one young. 

 Maceio coral reef ; two young. 



