1880.] NATURAL SCIENCES OF PHILADELPHIA. 147 



§ B. Front broad between the orbits. 

 * Male abdomen seven-jointed. 



22. Gelasimus vocator Martens. PI. x, f. 20. 



Cancer vocator Herbst, Bd. iii, h. iv, p. 1, PI. LIX, f. 1 (1804). 

 Gelasimus vocans Edw., Hist. Nat. Crust., ii, p. 54 (1837) ; 111. Edit. 



Regne Animal, Cru.stacea, PI. XVIII, f. 1 (no date) ; White, Cat. B. 



M. Crust., p. 36 (sine synon.), 1847. 

 Gelmimus vocans (pars) Gould, luvertebrata of Mass, p. 325 (1841). 

 Oelasimus vocans var. a Dekay, N. Y. Fauna Crustacea, p. 14, PI. VI, 



f. 10 (1844). 

 Gelasim2is palustrisBdyr., Ann. Sci. Nat., Ill, xviii, p. 148, PI. IV, f. 



13 (1852) ; Stimpson, Annals N. Y. Lyceum Nat. Hist., p. 62 (1860); 



Smith, Trans. Conn. Acad., ii, p. 127 (1870). 

 Gelasimus pugillator Leconte, Proc. Acad. Nat. Sci., Philadelphia, 



1855, p. 403. 

 Gelasimus brevifrons Stimps., Ann. N. Y. Lyceum, vii, p. 229 (1860) ; 



Smith, Trans. Conn. Acad., ii, p. 131 (1870) ; Lockington, Proc. 



Cal. Acad., vii, p. 147 (1877). 

 Gelasimus sp. Saussure, Memoirs Societe Phys. et Hist. Nat. Geneve, 



xiv, p. 440 (1858,1. 

 Gelasimus vocator Martens, Archiv fiir Naturgesch., xxxv, p 1 (1869 ; 



xxxviii, p. 104 (1872) ; Kingsley, Proc. Phila. Acad., 1879, p. 400. 

 Gelasimus pugnax, mordax et rapax Smith, Trans. Conn. Acad., ii, pp. 



131, 135, 134, Pis. II, f. 1, 2, 3, IV, 2, 3, 4 (1870). 

 Gelasimus affinis Streets, Proc. Phila. Acad., 1872, p. 131. 

 Gelasimus crenulatus Lockington, Proc. Cal. Acad., vii, p. 149 (1877). 



Carapax smooth, meros of the larger eheliped with its margins 

 denticulate or tuberculate, cai-pus externally granulate, internally 

 with an oblique tubercular ridge. Hand tuberculate, its inner 

 surface with a ridge running up from lower margin to carpal 

 groove ; in front of this are scattered granules. Thumb straight, 

 extremity obliquely truncate, finger strongl}^ arcuate, longer than 

 the thumb. 



East Coast of America, from Cape Cod! to Para, Brazil! West Indies! 

 and Aspinwall ! West Coast of Mexico ! Panama! 



The localities from which I have examined specimens number 

 over thirty and embrace several hundred specimens. I find in 

 the Guerin Collection two specimens from Mauritius which closely 

 resemble Cuban forms. 



This is, without much doubt, the species intended by Herbst ; 

 Edwards quotes the Cancer jMlustris of Sloane as this species, 

 but aside from the fact that his History of Jamaica was published 

 in 1125, And his name is therefore ante-Linnean (and is also poly- 



