132 SMITHSONIAN MISCELLANEOUS COLLECTIONS 



218. CYCLOGRAPSUS PUNCTATUS Milne Edwards 



Cyclograpsus punctatus Milne Edwards, Hist. Nat. des Crust., 11, 78; 



Mel. Carcin., p. 163. 

 Gnathochasmus barbatus McLeay, in Smith's Illust. Zool. S. Africa, Crust., 



pi. III. 



Living specimens are of a purplish-brown color, with black 

 punctse. 



It lives among- rocks and stones on sandy shores, in the third sub- 

 region of the littoral zone. Found at Simon's Bay, Cape of Good 

 Hope ; also in the harbor of Hongkong, China. 



219. CYCLOGRAPSUS AUDOUINI Milne Edwards 



Cyclograpsus aiidouini Milne Edwards, Hist. Nat. des Crust., 11, 78; Mel. 

 .Carcin., p. 163. 



Our specimens belong in all probability to the species here quoted, 

 but the distinctions of species in this genus are so slight that it may 

 well be different. The dactyli of the walking feet are much thicker 

 than in the specimens referred to C. audouini by Dana. 



The color in life was red, much darker on the anterior part of the 

 carapax ; in some specimens there were minute white markings. 

 Hands paler; feet rather dark above. Below, body and members 

 white. The dimensions of the largest specimen, a male, are : Length 

 of carapax, 0.88; breadth, 1.09 inches. 



It is common under stones above half-tide mark in Port Jackson 

 or Sydney Harbor, Australia. 



Genus CHASMAGNATHUS De Haan 



The genus Chasmagnathus is very closely allied to Helice, and we 

 can see no sufficient reason for placing these genera in separate 

 families, as is done by Milne Edwards in his "Melanges Carcin- 

 ologiques." The arcuated sides of Chasmagnathus is almost the 

 only character in which it resembles the Cyclograpsacese. The 

 jugal regions are as distinctly reticulated as in Sesarma; the front, 

 orbits, antennas, etc., are as in Helice, and the outer maxillipeds only 

 differ from those of the latter genus in being more elongated. 



The species described by Dana are intermediate between Chas- 

 magnathus and Helice, and some of them seem to belong properly 

 to the latter genus. 



