152 BULLETIN 166, UNITl^D STATES NATIONAL MUSEUM 



acutely triangular merus of external maxillipeds is half or a little 

 more than half the length of ischium measured along inner edge; the 

 second article of the exognath has the outer margin more or less curved. 

 Chelipeds rather massive. Abdomen of male with segments 3-5 

 fused, of female with 4-6 fused. 



New Jersey to Brazil; Lower Cahfornia, Mexico, to Chile. 



KEY TO THE SPECIES OF THE GENUS PERSEPHONA 



A'. Less than seven spines or teeth on posterior and lateral margins 

 of carapace. 

 B*. Only three spines on carapace. 



C. Subhepatic margin angled. Carapace subcircular. 



Di. A broad blunt tooth at subhepatic angle. Granulation 



fine. Front slightly produced punctata punctata (p. 152) 



D^. A granule at subhepatic angle. Granulation coarse. 



Front prominent punctata aquilonaris (p. 154) 



C2. Subhepatic margin arcuate, not angled. 



D^. Carapace subcircular; length and breadth equal, exclu- 

 sive of spine. Palm of female less than twice as long 



as wide edwardsii (p. 154) 



D^. Carapace suboval, longer than broad, exclusive of 



spine. Palm nearly three times as long as wide.-subovata (p. 158) 

 B2. Only five spines or teeth on carapace; a spine or tooth at sub- 

 hepatic angle. 

 C^ Subhepatic spine or tooth of male short, acute, denti- 

 form orbicularis (p. 160) 



C^. Subhepatic spine of male long, cylindrical townsendi (p. 160) 



A^. More than five marginal spines or teeth or tubercles, one of 

 which is at widest part of carapace. 

 B'. Seven lateral and posterior spines. Carapace slightly wider 



than long, spines excluded lichtensteinii (p. 163) 



B-. Nine lateral and posterior spines, teeth or tubercles; a tooth 

 between subhepatic angle and widest part of carapace. 

 Carapace longer than wide, spines excluded. 



C. Nine excrescences short, tuberculiform crinita (p. 163) 



C^. Seven spines, two tubercles finneganae (p. 161) 



analogous species of persephona on opposite sides of the continent 



Atlantic Pacific 



punctata punctata. subovata. 



PERSEPHONA PUNCTATA PUNCTATA (Linnaeus) 



Plate 42, Figures 2, 3 



Guaia alia species? Marcgrave, in Piso and Marcgrave, Historia rerum natu- 

 ralis Brasiliae, p. 182, 1648. 



Three thorned Crab Browne, The civil and natural history of Jamaica, p. 422, 

 pi. 42, fig. 3, 1756. 



Cancer punctatus Linnaeus, Systema naturae, ed. 10, vol. 1, p. 630, 1758 (part) 

 (type localities, Asia; America). [Amboina (Rumphius) and Jamaica 

 (Browne).] Not C. punctatus Herbst, Versuch einer Naturgeschichte der 

 Krabben und Krebse, vol. 1, p. 89, pi. 2, figs. 15, 16, 1783, which is Myra 

 fugax. 



