176 BULLETIN 152, UNITED STATES NATIONAL MUSEUM 



orbits. Upper orbital suture short but deep. Antennules heavily- 

 ciliated as is also the pterygostomian ridge, which is visible in dorsal 

 view below and outside the antero-lateral dentation. Chelipeds 

 unarmed; surface similar to that of carapace; merus and carpus cili- 

 ated; prehensile edge of fingers closely and evenly dentate. Dactyli 

 of legs of first three pairs broad especially at middle, midrib thick; 

 dactylus of last pair flat, broad-lanceolate, natatory. The last pro- 

 podus also short and broad; dactylus fringed below, next three 

 articles fringed on both margins. 



Color. — Generally yellowish, with a multitude of irregular and con- 

 fluent red spots. 



Measurements. — Male (22066), length of carapace 53.3, width of 

 same 49, fronto-orbital width 16.8, front between tips of outer teeth 

 6.1 mm. 



Range. — Peru and Chile. 



Material examined. — 



PERU. — Independencia Bay; 1919; Robert Cushman Murphy; 1 

 female (54211) received from Brooklyn Museum; 1 male (Brooklyn 

 Mus.). 



CHILE. — Lota; 1888; Albatross; 7 males, 2 females, 26 young 



(22066). 



Family CANCRIDAE 



Cancridae Alcock (part: Cancrinae-{- Pirimelinae) , Jourii. Asiat. Soc. Bengal, vol. 

 G8, 1899, p. 94. 



Carapace broadly oval, front with several teeth, one of which is 



median. Antennules folded lengthwise. Antennal flagella present, 



short, more or less hairy. Third maxillipeds usually overlapping 



endostome. 



Genus CANCER Linnaeus • 



Cancer Linnaeus, Sys. Nat., ed. 10, vol. 1, 1758, p. 625; type, C. pagurus Lin- 

 naeus. 



Alpheus Weber, Nomenclator Entomologicus, 1795, p. 91; type, A. pagurus 

 (Linnaeus). Not Alpheus Fabricius, Suppl. Entom. Syst., 1798, p. 380. 



Pagurus Berthold, Latreille's Nattirliche Familien des Thierreichs, 1827, p. 255; 

 type, P. pagurus (Linnaeus). Not Pagurus Fabricius, Syst. Entom., 1775, 

 p. 410. 



Trichocera de Haan, Fauna Japon., Crust., 1833, pp. 4 and 16; type T. gibbosula 

 (de Haan). Not Trichocera Meigen, lUig. Mag., vol. 2, 1803. 



Platycarcinus Milne Edwards, Hist. Nat. Crust., vol. 1, 1834, p. 412; type, 

 P. pagurus (Linnaeus). 



Romaleon Gistel, Natur. des Thierreichs, 1848, p. 11. Substituted for Tri- 

 chocera. 



Metacarcinus A. Milne Edwards, Ann. Sci. Nat., Zool., ser. 4, vol. 18, 1862, 

 p. 33; type, M. magister (Dana). 



Trichocarcinus Miers, Proc. Zool. Soc. London, 1879, p. 34; type, T. gibbosula 

 (de Haan). Substituted foe Trichocera. 



Carapace transversely subelliptical, often indistinctly areolated. 

 Front narrow, cut into five teeth or lobes, those of the outer pair form- 



