1880.] NATURAL SCIENCES OF PHILADELPHIA. 193 



Cancer grapsus Liim., Syst. Nat., Edit., x, p. 630 (1758). 



Qrapsus pictus Latieille, Hist. Crust, etiiis., vi, p. 69, PI. XL VII, f. 3 



(1803-4.) 

 Goniopsis pictus De Haan, Fauna Japonica Crust., p. 33 (1835). 

 Grapsus strigosus Brulle, in Webb et Berthelot Hist Canaries, ii, PI. 



II ; Crustacea, p. 15, 1836-44 (teste'Edw.)' 

 Grapsus maculatus, webbi, ornaius et pharaonis Edw., Ann. Sci. Nat. 



pp. 167-8, PI. VI, f. 1 (1853). 

 Grapsus aUifrons Stimpson, Annals N. Y. Lyceum Nat. Hist., vii, p. 



230 (1860). 



Carapax depressed, transversel}^ plicate, folds anteriorly broken 

 lip into squamiform tubercles. Frontal crest four-lobed, median 

 lobes the larger, their margins subtuberculate. Frontal margins 

 crenulate, regularly arcuate. Lateral margin arcuate. Inferior 

 border of orbit with a deep fissure. Anterior border of ischium 

 and meros of cheliped spinose, the lower margin of the meros spino- 

 tuberculate, the posterior surface plicate. Carpus with distant 

 tubercles, its interior margin with a laminate spine. Hand above 

 tuberculate, externally with longitudinal ridges, below with 

 oblique folds. On the inner surface the tubercles and folds are less 

 prominent. Fingers short, tips excavate. Ambulatory feet com- 

 pressed, propodal and dactylic joint spinose. 



Florida Keys! (Webster, Ashmead) ; West Indies/ (Lawrence, 



Wood, Wilson, Goes, Lea) ; San Lorenzo I (Wilkes' Expedition) ; 



Pernambuco! (Dr. Wilson); Tahiti! (A. Garrett); W. Coast 



Mexico! (Dr. Jones); Central America I (McNiel) ; New Zealand! 



(Dr. Wilson); Mauritius! (Guerin) ; Natal! (Dr. Wilson); 



Georgia, California, Peru, St. Helena and Cape Verde Is. (Miers) ; 



Paumotu and Hawaian Is. (Dana) ; Honduras! (no collector's 



name). 



The genus Graj)sus, as well as several others, is divided into 

 sections by Milne-Edwards, characterized either by having the 

 posterior distal angle of the meros of the last pair of ambulatory 

 feet regularly rounded, or dentate ; but in specimens of G. macu- 

 latus., I have occasionally found this angle on one side entire, and 

 the other dentate. 



G. maculatus var. tenuicristatus Alartens ex Herbst. 



Cancer' tenuicristatus Herbst. Krabbeu und Krebse, PI. Ill, f. 33-34, 



1790 (teste Martens). 

 Grapsus rudis Edw., Hist. Nat. Crust., il p. 87 (1837). 

 Grapsus hirtus Randall, Jour. Phila. Acad., viii, p. 124 (1839). 



^ Brulle gives not the slightest description which will distinguish his 

 specimens from either maculatus or strigosus. 



