THE CANCROID CRABS OF AMERICA 405 



Panopeus abbreviatus Stimpson, Ann. Lye. Nat. Hist. New York, vol. 7, 1860, p. 211 



(type-locality, Barbados; type in M. C. Z.). 

 Panopeus politus Smith, Trans. Connecticut Acad. Sci., vol. 2, 1869, pp. 3 and 34, 



pi. 1, fig. 4 (type-locality, Abrolhos Reefs, Brazil; type in P. M. Y. U.). 

 Eurypanopeus parvulus A. Milne Edwards, Crust. Reg. Mex., 1880, p. 322, pi. 59, 



figs. 5-5d. 

 Eurypanopeus abbreviatus A. Milne Edwards, Crust. Reg. Mex., 1880, p. 320, 



pi. 59, figs. 3, 3a. — Rathbun, Ann. Inst. Jamaica, vol. 1, 1897, p. 19; Bull. 



U. S. Fish Comm. for 1900, vol. 20, part 2, 1901, p. 30. 

 Panopeus parvulus Benedict and Rathbun, Proc. U. S. Nat. Mus., vol. 14, 1891, 



p. 369, pi. 21, fig. 1; pi. 23, figs. 2 and 3. 



Diagnosis. — Antero-lateral margin cut into shallow lobes. Carpus 

 of cheliped with a broad low blunt tooth at inner angle. Color of 

 immovable finger not prolonged on palm. Fingers of minor chela acute. 



Description. — Carapace naked above, broad, moderately convex in 

 two directions, granulate and imeven on the front and along the 

 antero-lateral border, smooth and poUshed on median regions and 

 posteriorly. Regions slightly but distinctly indicated. Several well 

 marked rugae among the granules: One on the raised epigastric lobes; 

 one, straight or broken, on hepatic region, subparallel to antero- 

 lateral margin ; one or two on ante- 

 rior part of protogastric region; one 

 epibranchial. Front strongly de- 

 flexed, edge somewhat beveled from 

 above and four-lobed ; median lobes 

 prominent, obhque, separated by an 

 acute V-notch, lateral lobes project 

 as small narrow teeth. Upper mar- 

 gin of orbit with two slight notches figure 63.-Eurtpanopeu3Abbreviatos, male, 



followed by deeply impressed closed enlarged, a. abdomen. 6. major chela. 



. . . T 1 After Benedict and Rathbun 



fissures, mtervenmg margin a little 



convex. Suborbital notch broad and shallow, adjacent margin sloping 

 somewhat backward to base of the stout inner tooth. On the sub- 

 hepatic region a low, granulated swelling below the interval between 

 first two lateral teeth. Antero-lateral margin thin, divided by small 

 notches into four lobes, the first of which is composed of the incon- 

 spicuous angle of the orbit coalesced by a shghtly concave line with 

 the low, rounded lobule or normal second tooth; third tooth (second 

 lobe) truncate, oblique, with either end an obtuse angle; fourth tooth 

 with outer margin longitudinal or nearly so, anterior angle a right 

 angle and slightly carinate; fifth tooth sub triangular, directed straight 

 outward. 



Chelipeds of male very unequal. Inner angle of carpus marked by 

 a low blunt lobe. Major palm stout and high. Fingers slender, 

 pointed, widely gaping in the major chela, fitting closely in the minor 

 chela, tips crossing in both; a very large tooth at base of larger dactyl, 

 base of immovable finger rectangular, then rapidly diminishing; 



