112 Rathbun Description of a New Species of Cancer. 



Carpal and proposal joints of the ambulatory legs almost naked. Dac- 

 tyli with six longitudinal sulci, two superior, two inferior, one anterior 

 and one posterior; in antennar'ms there are eight sulci, three superior, 

 three inferior, one anterior, and one posterior. 



Color, brownish red. Lower surface and legs much less hairy than in 

 antennnrius. 



Dimensions. tf : Length, 42.4; width, 65; exorbital width, 18.2 mm. 

 9 : Length, 35; width, 51 ; exorbital width, 15 mm. 



Type locality. Playa Maria Bay, west coast of Lower California ; A. W. 

 Anthony, collector; 1 r?, 1 ? (U. S. Nat. Mus., No. 19856). 



NOTE ON SESARMA. 



Sesarma sequatorialis Ortmann, Zool. Jahrb., Syst., VII, Heft 5, 722, pi. 

 xxiii, f. 14, 1894, Ecuador, should be added to the list of species of Sesarma 

 on pages 89-91 of these Proceedings. As Heft 5 of vol. VII is not con 

 tained in the library of the Smithsonian Institution, I am unable to supply 

 the characters of this species. 



