N0.17GO. STALK-EYED CRUSTACEA OF PERU—RATHBUN. 547 



GRAPSUS GRAPSUS (Linnasus). 

 Plate 12, fig. 1. 



Pagufus maculatus Catesby, Nat. Eist. Carolina, Florida, and the Bahama 



Islands, vol. 2, 1743, p. 36, pi. 3(1, fig. I. 

 Cancer grapsus Linn/eus, Syst. Nat., 10)h ed., vol. 1, L758, p. 630. 



Of good size. Carapace 1 discoidal, crossed by obliquely transverse 

 ridges, tuberculate anteriorly; one side tooth behind the dentiform 

 antero-lateral angle. Front broad, high, almost vertical, overhanging 

 epistome and almost concealing antennules; four prominent superior 

 tubercles. Chelipeds short, stout, tuberculate and striate; a broad 

 flat tooth on wrist; tips of fingers broad, spoon-shaped. Legs long, 

 broad and flat; dactyli short, spinous. 



Width 70 to 85 mm. 



Pescadores Island-, February 12. Abundant, running on the rocky shores, in and 

 above the surf. 



From the rocks in and above the surf, north end of Callao water front, December 

 27, 190(5. The crabs of this or closely related species are exceedingly abundant on all 

 rocky shores from Independencia Bay to Lobos de Tierra, at least. 



"Arafia." Crab abundanton the rocky shores, usually just above the water. Val- 

 ued for bait in the line fishing. Chincha Islands, July 13. 



"Arana." Mollendo, July 25, 1908. 



Distribution. — From Lower California to Chile; Galapagos Islands; 

 Juan Fernandez. Also shores of tropical Atlantic. 



LEPTOGRAPSUS VARIEGATUS (Fabricius). 

 Plate 45, fig. 2. 



Cancer variegatus Fabricius, Ent. Syst., vol. 2, 1793, p. 450. 



Grapsus planifrons Dana, Crust. U. S. Expl. Exped., pt. 1, 1852, p. 338; atlas, 

 1S55, pi. 21, figs. 3«-3r. 



In size and shape similar to preceding. Two side teeth behind 

 antero-lateral angle. Front broad, moderately inclined, truncate. 

 Chelipeds larger than in Grapsus; inner margin of arm laminate; 

 tooth of wrist small; outer surface of palm nearly smooth; ringers 

 widely gaping at base in male. Legs of moderate length; last two 

 joints spinous. Form and color variable. 



Width 60 to 70 mm. 



"Cangrejo." Mollendo, July 25, 1908. 



Distribution. — From Peru to Chile; Juan Fernandez; also Australia 

 and other parts of the southern hemisphere. 



GONIOPSIS PULCHRA (Lockington). 

 Plate 17. fig. 3. 



Goniograpsus pulcher Lockington, Proc. Cal. Acad. Sri., vol. 7, 1876 (1877), p. 

 L52 |s|. 



Carapace subquadrilateral, convex, smooth in the middle, striated 

 elsewhere. Front half as wide as carapace, vertical, four lobes abo\ e. 



