of the Pacific Shores of North America. 469 



Mus. Expl. Exped. ; Bost. Soc. ; Phil. Acad.; Smith- 

 sonian ; Acad. Petrop. ; Paris. 



PSEUDOGKAPSUS NUDUS. Dana. 



Pseudograpsus nudus, Dana; U. S. Exploring Expedition, Crust, i. 335, PL XX. 

 f. 7. Milne-Edwards ; Melanges Carcinologiqy.es, 158. Stimpson ; Proc. 

 Col. Acad. Nat. Sci. i. 88. 



This beautiful species may be at once recognized by the 

 glossy smoothness of its feet. The posterior pair of feet 

 are very short. It is of a dark purplish-red color above ; the 

 carpus and hand much lighter, and spotted. It grows to a 

 large size ; — the carapax of one specimen from Monterey 

 measuring two inches in length, by two and two fifths in 

 breadth. It has some resemblance to Pachygrapsus crassi- 

 pes, which is found with it, but may be distinguished by 

 the character of the maxillipeds and the nearly smooth tarsi. 

 It is found among rocks at the mouths of bays, or on the 

 open sea-coast, where the water is clear. Like the preced- 

 ing it is a littoral species, and is often found near high- 

 water mark. It was found in Puget Sound, (Expl. Exped. ;) 

 Tomales Bay, (Samuels ;) San Francisco Bay, (Stimpson;) 

 and at Monterey, (Trowbridge and Taylor.) 



Mus. Bost. Soc. ; Smithsonian ; Acad. Petrop. 



Heterograpsus marmoratus, M. Edw. (Cyclograpsus mar- 

 moratus, White,) is perhaps identical with P. nudus. If 

 so, Dana's name has priority, as no description accompa- 

 nies White's name in the British Museum catalogue. It 

 is said to be found at Sitka. 



GECAECINUS QUADEATUS. De Saussure. 

 Gecarcinus quadratus, De Saussure ; Rev. et Mag. de ZoOl. v. 360, PI. XII. f. 2. 



Mazatlan, (Verreaux.) 

 Mus. Phil. Acad. 



