198 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



Valparaiso, Chile; specimen in Copenhagen Mus. 



Talcahuano, Chile; January 15, 1927; W. L. Schmitt; 1 young male 

 (62361). 



Talcahuano or Lota; January 15 or 16, 1927; W. L. Schmitt; 1 

 female (61080). 



Lota; January 16, 1927; W. L. Schmitt; 1 male, 5 females (61079). 



West coast of South America; Dr. W. H. Jones, U. S. Navy; 1 

 female (14844). 



CANCER PLEBEJUS Poeppig 



Plate 81; Plate 82, Figure 1; Plate 85, Figure 3 



tCancer coronaius Molina, Saggio sulla Storia Naturale del Chili, 1782, p. 207,. 



(type-locality, Chile; type not extant); French translation, 1789, p. 183. 

 Cancer irroratus Bell, Proc. Zool. Soc. London, vol. 3, 1835, p. 87; Trans. Zool. 



Soc. London, vol. 1, 1835, p. 340, pi. 46; pi. 47, figs. 6 and 7.— Heller, Raise 



Novara, Zool., vol. 2, 1865, p. 6.— Lenz, Zool. Jahrb., Suppl. 5, vol. 2, 1902, 



p. 759. Not C. irroratus Say. 

 Cancer plebejus Poeppig, Arch. f. Naturg., vol. 2, pt. 1, 1836, p. 134 (type-locality^ 



on muddy shores, Chile; type in Mus. Zool. Univ. Leipzig. — Kinahan^ 



Journ. Roy. Soc. Dublin, vol. 1, 1858, p. 335. — Miers, Proc. Zool. Soc. 



London, 1881, p. 67.— Ortmann, Zool. Jahrb., Syst., vol. 7, 1893, p. 425.— 



Rathbun, Proc. U. S. Nat. Mus., vol. 21, 1898, p. 581; vol. 38, 1910, p. 



539, pi. 38, fig. 1. 

 Platycarcinus irroratus Milne Edwards and Lucas, d'Orbigny's Voy. I'Am^r. 



M6rid., vol. 6, pt. 1, 1844, p. 19.— Nicolet, in Gay, Hist. Chile, vol. 3, 1849, 



p. 142; not C. irroratus Say nor C. amaeneus Herbst. 

 Cancer plebeius Dana, U. S. Expl. Exped., vol. 13, Crust., pt. 1, 1852, p. 155. — 



A. Milne Edwards, Nouv. Arch. Mus. Hist. Nat., vol. 1, 1866, p. 188. 



Diagnosis. — First antero-lateral (orbital) tooth narrower than any 

 of the others. Basal antennal article about two-thirds as broad as 

 long. Chelipeds narrow, merus widening distally very little. Black 

 of fingers restricted on outer margin to one-fourth or less of their 

 length. 



Description.- — Carapace very broad-oval, nearly smooth, having a 

 fine depressed granulation, convex, not very uneven; antero-lateral 

 teeth 9, shallow, edge crenate or denticulate, first 7 teeth truncate, 

 lobiform, last two dentiform; one strong postero-lateral tooth, follow- 

 ed sometimes by a slight notch. Fronto-orbital distance less than 

 one-fourth width of carapace; frontal teeth between the antennae 

 triangular, median one narrower and more projecting; inner orbital 

 tooth short, outer tooth little advanced, forming part of the first 

 antero-lateral tooth. Tooth of basal antennal article large, triangular 

 in cross-section, flat below, well advanced. The outer maxillipeds 

 overlap and conceal the epistome; the truncate distal margin of the 

 merus makes a slightly acute angle with the outer margin, the outer 

 corner rounded. Merus of cheliped with 2 triangular acute teeth at 

 end of upper margin; inner tooth of carpus acute; palm with 4 outer 

 and 2 upper carinae, the uppermost spinous, the next spinulous; upper 



