I02 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



159. SCOPIMERA TUBERCULATA Stimpson 



Scopimera tuberculata Stimpson, Proc. Acad. Nat. Sci. Phila., x, p. 98 

 [44], 1858. 



Carapax broad, but much narrower on the dorsal surface than at 

 the bases of the anterior ambulatory feet. Length to greatest breadth 

 as I : 1.66. Surface uneven, the branchial and hepatic regions being 

 separated from each other and from the gastric and postmedian re- 

 gions by well-marked though irregular sulci. The upper surface, 

 with the exception of the broad and smooth postmedian region, is 

 everywhere studded with protuberances and tubercles, irregular in 

 their size and distance from each other. The lateral margins of the 

 back are prominent, ciliated, and passing backward and downward 

 are continuous with the suprapedal margins of the carapax. On each 

 side beneath the dorsal margins there is a deep, smooth longitudinal 

 sulcus. The sides are covered with setiferous granules, most crowded 

 below. Orbits ample, oblique, well excavated, external angle form- 

 ing a small tooth. External maxillipeds convex ; meros partly granu- 

 lated, more than half as large as ischium, and joined to it by an 

 oblique suture ; palpus rather exarthroid than prosarthroid, but 

 joined at the summit of the meros. Chelipeds equal, elongated, 

 more than twice as long as the carapax, but shorter than the first 

 pair of ambulatory feet. Ambulatory feet tapering, sparsely fringed 

 below with stiff blackish hairs ; tympana nearly as in 6". globosa or 

 Doto myctiroides. Abdomen as in S. globosa. Dimensions of the 

 body in a male : Length, 0.36 ; breadth at base of second ambulatory 

 feet, 0.6 inch. 



This species approaches Doto somewhat in character. It differs 

 from De Haan's S. globosa in the character of the upper surface of 

 the carapax and in the obliquity of the meros- joint in the outer 

 maxillipeds. 



It lives in holes in sandy-mud flats at and above low-water mark. 

 Found in the inner harbor of Simoda, Japan. 



MYCTIRID^ 

 Genus MYCTIRIS Latreille 



160. MYCTIRIS LONGICARPUS Latreille 



Myctiris longicarpus Latreille, Encyc. Meth., Ins., pi. ccxcvii, fig. 3. 

 Milne Edwards, Hist. Nat. des Crust., 11, 2i7\ Mel. Carcin., 118. 

 Dana, U. S. Expl. Exped., Crust., i, 389. 



This crab, when alive, is of an opaque light-blue color above and 

 bluish-white below. The feet are white except at the joints, which 



