1880.] NATURAL SCIENCES OF PHILADELPHIA. 199 



Fingers of cheliped smooth. transversus. 



Fingers dentate or spined above. gracilis. 



Bides two-toothed. 



Transverse lines of carapax naked. marmoratus. 



Transverse lines of earapax haired. pubeseens. 



Unknown to me. latipes. 



P. crassipes Randall. 



Paehygrapms crassipes Randall, Jour. Acad. Nat. Sci. Philadelphia, 

 viii,p. 127 (1839). 



Grapsus eydouxi ^dw., Ann. Sci. Nat., Ill, xx, p. 170 (1853). 



Leptograpsus gonagrus Edw., L c, p. 173 (1853). 



Carapax somewhat arcuate, sides with a single tooth behind the 

 orbital angle ; frontal lobes prominent ; front deflexed, its margin 

 nearly straight, the angles with a prominent tooth. Meros of 

 Ghelipeds with the anterior margin produced, distally truncate and 

 dentate. Hands inflated, margined above and with a longitudinal 

 ridge on the lower outer surface ; fingers excavate. Distal angle 

 of meros of posterior ambulatory feet roimded ; dactyli of the 

 ambulatory feet spinulose. 



(?) Sandwich Is. ! (T. Nuttall, Randall's type); California from San 

 Francisco! to San Diego ! (Many coUectoi's) ; ? New Providence, 

 W. I. ! (H. C. Wood, Jr.); Tolcohama (Tozzetti). 



P. maarus Lucas. 



P achy grapsus maurus Lucas, Expl. Algiers, Crust., p. 20, PL II, f. 5 



1849). 

 Ooniograpsus simplex Dana, Proc. Acad. Nat. Sci. Phila., 1851, p. 



24'J ; U. S. Expl. Exped. Crust, p. 344, PI. XXXI, f. 8 (1852). 



Pachygrapsus simplex Stimpson, Proc. Acad. Nat. Sci. Phila., 1858, 



p. 102. 



Algiers (Lucas) ; Madeira (Dana); Bio Janeiro (Dana, Heller). 



P. transversus Gibbes. 



Pachygrapsus transversus Gibbes, Proc. Am. Assoc. Adv. Science, iii, 



p. 182 (1850). 

 Ooniograpsus innotatus Dana, Proc. Acad. Nat. Sci. Phila., 1851, i>. 



249 ; U. S. Expl. Exped. Crust., p. 345, PI. XXI, f. 9 (1852). 

 Leptograpsus rugulosus Edw., Ann. Sci. Nat. Ill, xx, p. 172 (1853). 

 Pachygrapsus lavimanus Stimpson, Proc. Phila. Acad., 1858, p. 102. 

 Metopograpsus duhiusetminiatus, Saussure, Mem. Soc. Phys, etd'Hist. 



Nat. Geneve, xiv, pp. 444-445, PI. II, f. 16, 17 (1858). 

 Grapsus declivifrons Heller, Verhandl. Z. B. Gesellschaft, Wien, 1862, 



p. 521. 

 Pachygrapsus intcrmedius Heller, Novara Crust, p. 44 (1865). 

 Pachygrapsus socius Stm., Ann. N. Y. Lye. x, p. 114 (1871). 

 Pachygrapsus advena Catta Ann. Sci. Nat. VI, iii, No. 1. p. 7, PI. I 



(1876). 



