134 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



a dactylopodites tres allong"es, comprimes et epineux. — Mers de 

 Chine." 



Our crab agrees pretty well with this description. The hand is, 

 however, rather tnberculated than verrucose, and the armature of 

 the dactyli consists rather of very stiff sette than spines, as they are 

 flexible, and jet black in color. 



The carapax is considerably flattened above, and less uneven than 

 is usual. The anterior margins of the epigastric lobules are in the 

 same straight line. The feet are slender, with narrow meros-joints. 

 Color yellowish brown, mottled. 



Found on marshy shores in the harbor of Hongkong, China. 



224. SESARMA BIDENS (De Haan) Dana 



Pachysoiiia bidens De Haan, Fauna Jap., Crust., p. 60, pi. xvi, fig. 4, and 



XI, fig. 4. 

 Sesarma bidens Dana, U. S. Expl. Exped., Crust., i, 353. M11.NE 



Edwards, Mel. Carcin., p. 151. 



Inhabits muddy estuaries. Taken at Simoda and at Hongkong. 

 From the former locality we have but one specimen, a female, in 

 which the oblique superior crests of the hand are scarcely pectinated, 

 and there are only small tubercles on the superior edge of the mova- 

 ble finger. 



The Hongkong specimens agree in everv respect with De Haan's 

 species except that the meros-joints of the walking feet are some- 

 what less dilated and the carapax less abundantly setose anteriorly. 



225. SESARMA DEHAANI Milne Edwards 



Pachysoma quadratum De Haan, Fauna Jap., Crust., p. 62, pi. viii, fig. 3. 

 Sesarma dehaani Milne Edwards, Mel. Carcin., p. 150. 



Color in life yellowish, clouded with black anteriorly and with 

 olive posteriorly. Beneath yellowish-green ; meros of chelipeds red- 

 dish. Hands lemon colored. In specimens from Whampoa the 

 hands were white externally and the eyes bright 3'ellow. The cara- 

 pax is sometimes bright purplish anteriorly. 



Of this species the largest and finest specimens (in some of which 

 the carapax measured 1.83 inches in length and 1.95 inches in 

 breadth) were found at Port Lloyd, Bonin Islands, where they live 

 in holes in the banks of fresh-water streams near their embouchure. 

 It is a very courageous animal, defending itself successfully from 

 the attacks of small dogs. It also occurred in brackish water at 

 Whampoa, China, and at Simoda, in Japan. 



