44 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



59. ACTEODES TOMENTOSUS' (Milne Edwards) Dana 



Zo^ymus tomcntosus Milne Edwards, Hist. Nat. des Crust., i, 385. 

 Acteodcs tomcntosus Dana, U. S. Expl. Exped., Crust., i, 197. 



This crab is of an uniform dark-brown or purplish-brown color, 

 almost black ; the eyes blood-red ; the antennulse white at base : the 

 fingers reddish. It may be observed at low water in great numbers 

 on the level outer reefs of Loo Choo, taking refuge, when pursued, 

 in the crevices of the rock. It was also found by the expedition at 

 Ousima, at the Amakirrima Isles, and at Hongkong, China. Ac- 

 cording to Dana it is also common among the coral islands of the 

 South Pacific and in the Sooloo Sea. 



Genus ACT.^A (De Haan) Dana 



60. ACTJEA PURA - Stimpson 



Plate V, Fig. 7 

 Actaa piira Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. s^ [30], 1858. 



Carapax rather narrow; proportion of length to breadth, i : T.28. 

 Surface of body and feet thickly covered above with granulated 

 subconical tubercles, but everywhere clean and free from pilosity. 

 The tubercles give the surface a hard porcellanous or crystalline 

 appearance like that of some shells. The regions or areolets are not 

 very prominent, being rendered somewhat indistinct by the crowd- 

 ing of the tubercles. Front with the two median lobes prominent. 

 Antero-lateral margin strongly convex, obscurely quadrilobate, lobes 

 tuberculated, the median tubercle in each being sharper and more 

 prominent than the rest. Postero-lateral margin short, concave. 

 Eyes large; outer margin of peduncle granulated. Pter>gostomian 

 surface granulous toward the outer margin, but becoming smoother 

 toward the mouth. Hectognathopoda with the surface of the 

 palpus and ischium smooth ; inner margin of ischium and surface of 

 meros granulated. Chelopoda large ; upper and outer surface tuber- 

 culated like the carapax; fingers blackish, sulcate, with tuberculated 

 ridges ; their inner edges strongly toothed, tips blunt, curved inward. 

 The tubercles of the ambulatory feet are somewhat smaller than 

 those of the carapax, but more sharply granulous ; on the dactyli 

 they become subspiniform and are arranged in longitudinal rows. 

 Inferior surface of the feet, and that of the sternum and abdomen. 



^ Acicea tomentosa (Milne Edwards). 

 ^ Actcea granulata (xA.udouin). 



