IQQ BULLETIN 166, UNITED STATES NATIONAL MUSEUM 



PERSEPHONA ORBICULARIS Bell 



Plate 45, Figures 5, 6 



Persephona orbicularis Bell, Trans. Linn. Soc. London, vol. 21, p. 294, pi. 31, 

 fig. 7, 1855 (type locality, Valparaiso; unique type in Mus. Bell). — Boone, 

 Bull. Vanderbilt Mar. Mus., vol. 2, p. 56, pi. 11, 1930. 



Diagnosis. — Five spines on carapace, the hepatic short, stout, 

 acute, the posterior spines slender. Carapace as broad as long, 

 exclusive of spine, and broader in hinder half. 



Description (after Bell). — Carapace orbicular, anterolateral margin 

 slightly waved, regions rather distinct, surface somewhat punctate, 

 with numerous minute granules, which are more thickly crowded on 

 lateral margin and on posterior portion; front with a very slight 

 triangular notch; subhepatic angle produced into a distinct tubercle; 

 the three posterior spines short, acute, recurved, the upper one forming 

 with the two inferior almost a right angle. External maxillipeds 

 with the ischium of endognath grooved longitudinally, and in the 

 female the inner grooved portion separated from the outer by a 

 ciliated ridge. Chelipeds with the arm wholly tuberculated, the 

 wrist granulated; fingers the length of the palm. Abdomen of female 

 with the first 3 segments and the base and margin of the shield, 

 tuberculated. 



Color. — Dull yellowish, regularly mottled with dull and pale red. 



Measurement. — Type female, length of carapace including spine 

 38.1 mm. 



Range. — Perlas Islands, Panama (Boone) to Valparaiso, Chile. 



PERSEPHONA TOWNSENDI (Rathbun) 



Plate 42, Figure 1; Plate 43, Figure 1 



Myra townsendi Rathbun, Proc. U. S. Nat. Mus., vol. 16, p. 255, 1893 (type 



locality, Albatross station 3034; type, U.S.N.M. no. 17382). 

 Persephona toumsendi Rathbun, Proc. U. S. Nat. Mus., vol. 21, p. 613, 1898; 

 vol. 38, pp. 594, 614, 1910. 



Diagnosis. — Five spines on carapace, two subhepatic, three posterior, 

 the median one forming a right angle with the lateral. 



Description. — Male: Carapace exclusive of spine slightly longer 

 than broad, a cylindrical spine on the subhepatic angle, the three 

 posterior spines longer, recurved, the median spine forming a right 

 angle with the lateral; it is also a little the longer and slightly com- 

 pressed laterally. Granules on the dorsum well separated and on 

 the gastric region few and indistinct; crowded near and below the 

 lateral edge, where there is no single marginal line. Front with two 

 well defined teeth, sinus broad. Granules of merus of cheliped coarse 

 on proximal half, gradually becoming very fine on distal half. 

 Sternum granulate except for a bare patch at base of cheliped. 



Female: A little more rotund than male. Subhepatic spine more 

 conical, posterior spines shorter. 



