56 Bulletin, Vanderhilt Marine Museum, Vol. II 



The external maxillipeds have the tip of the exognath more broadly 

 rounded than that of orbicularis which is triangular. There is in 

 punctata a distinct longitudinal groove on the ischium near and sub- 

 parallel to the inner margin ; outside this on both ischium and merus 

 is a row of stiff, brush-like setae and outside this is a row of heavy 

 granules. The remaining outer surface of the maxilliped is granulose ; 

 so also is the adjacent under part of the body. 



Synonymy. — Guaia alia Marcgrave, George, de Liebstad, Historia 

 Rerum Naturalium Brasilae, p. 182 and text figure, 1648. 



Cancer punctatus Brown, Civil and Natural History of Jamaica, vol. 

 2, p. 422, pi. 42, fig. 3, 1856. 



Cancer punctatus Linne, Syst. Nat., ed. 10, p. 630 (part), 1758. 



Persephona latreillei Leach, Zool. Misc. Ill, p. 22, 1814. 



Persephona lamarcki Leach, op. cit., p. 22. 



Guaia punctata Gibbes, Proc. Amer. Assoc. Adv. Sci., p. 185, 1850. 



Persephona guaia Bell, Trans. Linn. Soc. London, vol. 20, p. 292, 

 1855. 



Persephona punctata Coues, Proc. Acad. Nat. Sci. Pliila., vol. 30, p. 

 123, 1871. 



Persephona punctata Stimpson, Ann. Lye. Nat. Hist. N. Y., vol. 7, p. 

 70, I860.— Kingsley, Proc. Acad. Nat. Sci. Phila., p. 403, 1879. 



Persephona punctata Rathbun, Ann. Inst. Jamaica, vol. 1, pt. 1, p. 38, 

 1897; Report U. S. Fish Comm., vol. 20, pt. 2, p. 87, 1901.— 

 Hay and Shore, BuU. U. S. Bur. Fish., vol. 35, p. 424, pi. 32, 

 fig. 9, 1918. 



Persephona orl)icularis Bell. 



Plate 11, figs. A and B. 



Name : West Coast Purse Crab. 



Diagnostic characters: Carapace globular, covered with pearly 

 granules; a well-developed tooth pointing out and forward on the 

 pterygostomian region. A strong outward and slightly upward directed 

 tooth on the posterior region in the median line ; below this and out- 

 side it on each side is a similar tooth, the three forming a right-angled 

 triangle. The frontal region in orbicularis furnishes one of its most 



