202 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 

 CANCER POLYODON Poeppig 



Plate 82, Figure 2; Plate 85, Figure 5; Plate 90 



f Cancer setosus Molina, Saggio sulla Storia Naturale del Chili, 1782, p. 207, 

 (type-locality, Chile; type not extant); French translation, 1789, p. 182. 



Cancer dentatus Bell, Proc. Zool. Soc. London, vol. 3, 1835, p. 87, (type-locality, 

 near Valparaiso; type not extant); Trans. Zool. Soc. London, vol. 1, 1835, 

 p. 339, pi. 45, pi. 47, figs. 4 and 5.— Dana, U. S. Expl. Exped., vol. 13, Crust., 

 pt. 1, 1852, p. 155. — KiNAHAN, Journ. Roy. Soc. Dublin, vol. 1, 1858, p. 

 335. — Heller, Reise Novara, Zool., vol. 2, Crust., 1865, p. 6. — A. Milne 

 Edwards, Nouv. Arch. Mus. Hist. Nat., vol. 1, 1866, p. 197. — Ortmann, 

 Zool. Jahrb., Syst., vol. 7, 1893, p. 427. — Lenz, Zool. Jahrb., suppl. 5, vol. 2, 

 1902, p. 759.— Porter, Revista Chilena Hist. Nat., vol. 7, 1903, p. 149. 

 Not C. dentatus Herbst, 1785. 



Cancer polyodon Poeppig, Arch. f. Naturg., vol. 2, pt. 1, 1836, p. 133 (type- 

 locality, Chile; type in Mus. Leipzig). — Rathbun, Proc. U. S. Nat. Mus., vol. 

 21, 1898, p. 581. 



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

 M^rid., vol. 6, pt. 1, Crust., 1844, p. 20. — Nicolet, in Gay, Hist. Chile, vol. 

 3, 1849, p. 143. 



Diagnosis. — Hairy. Marginal teeth triangular, spinous. Three 

 marginal spines on carpus. Two rows of spines above chelae. 



Description. — Carapace convex, hairy and finely granulate, granules 

 not crowded, regions fairly delimited; marginal teeth triangular, 

 prominent, acute, edges coarsely spinous; antero-lateral teeth 9, the 

 first of orbital tooth the smallest; postero-lateral teeth 2, well marked, 

 the first much the larger. Frontal teeth thick those between the 

 antennae small, the median one much slenderer and more produced 

 than outer pair; a shallow lobe between inner and outer supra-orbital 

 teeth; antennal teeth long, inclined toward each other; two very 

 sharp infero -orbital spines, the inner one the larger but much smaller 

 than the antennal spine. Outer maxillipeds overlapping epistome. 

 Chelipeds rough above; two spines on merus; two large spines on 

 carpus, one at articulation, one at inner angle, smaller scattered spines 

 besides one below inner angle; two rows of spines above palm and 

 proximal half of dactyl. Five carinae on outer surface of palm are 

 granulate and hairy. Black of fingers occupies the distal two-thii^ds. 

 Ventral surface of body and margins of legs coarsely hairy; legs broad 

 and flat, dactyls v/ith 4 or 5 rows of hair. 



Color. — Color above rich re'ddish brown, somewhat mottled with 

 yellowish, particularly in young specimens; beneath red mottled with 

 yellow. (Bell.) 



Measurements. — Male (40417) length of carapace 79.8, width of 

 same 124.6, fronto-orbital width 33, width of front between antennae 

 10.8, width between tips of inner orbital teeth 18.2 mm. 



Range. — From Bay of Ancon, Ecuador (Ortmann) to the Island of 

 Chiloe, CMle. 



