THE GRAPSOID CRABS OF AMERICA. 79> 



Description of male (after Nicolet). — Carapace rounded from the 

 front along- the sides, narrowing slightly toward the back, posterior 

 border long and straight, two rather large punctae in the middle.. 

 Front quadrilateral, transverse, prominent bej^ond curve of antero- 

 lateral borders, its anterior margin broad and slightly hollowed out, 

 its middle occupied by a longitudinal depression bordered on each, 

 side by a raised, rounded, and forward-pointing projection. Orbits, 

 small but deep. 



Chelipeds and legs robust, long, and compressed; chelipeds much 

 shorter than legs; hand short, wide, and nearly quadrate, movable 

 finger wider than immovable and very much curved. Legs covered 

 with very short, coarse hair, scarcely visible; dactyls strong, curved,, 

 and with a sharp claw. 



Abdomen narrow, elongate; terminal segment triangular, longer 

 than the preceding. Posterior part of body rough with spinelike 

 hairs, of which there are some small ones on the inner margin of the 

 outer maxillipeds. 



Color. — Translucent yellow. 



Measurements. — Length of male carapace, 1 to 2 lines (Nicolet) ; 

 according to figure 2« cited, 3.5 mm. 



Habitat. — Probably in sea-urchins (Nicolet). 



Locality. — San Carlos de Chiloe, Chile. 



PINNOTHERES DEPRESSUS Say. 

 Plate 17, figs. 1 and 2. 



Pinnotheres depressum Say, Journ. Ac;h1. Nat. Sci. Philadelphia, vol. 1, 

 1817, p. 68 (type-locality, Egg Harbour; type not extant). — Fowler, 

 Ann. Rept. New Jersey State Mus. for 1911 (1912), p. 433, and; 

 synonymy. 



Zaops depressa Rathbun, Amer. Nat., vol. 34, 1900, p. 590. 



Diagnosis. — Carapace of male flat, bordered by a rim of short hair. 

 Eyes very large. Chelipeds very stout. Legs similar, dactyli long 

 and curved, last propodus much expanded, oval. 



Description of male. — Carapace flat, suborbicular, w^ith the front 

 advanced and rounding downward and the hind margin very little 

 convex; upper sinus of orbit almost rectangular; behind it a shallow, 

 longitudinal depression ; sides of front slightly convergent to a sub- 

 truncate margin which is feebly bilobed. Margin of carapace 

 marked by a raised line of very short, dense hair which is broader 

 behind, straightened and narrowed over the ej'^es and continued 

 around the front. Eyes very large, globular; cornea large. 



End of merus of outer maxilliped longitudinally truncate; carpus 

 not much longer than wide; propodus longer than carpus, suboblong,. 



