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University of California Publications in Zoology [Vol. 23 



Dimensions. — Types, male: length. 10 mm., width 6 mm., length cheliped about 

 28 mm.; female: length 7.5 mm., width 5 mm. 



Type Locality. — Off San Diego, California, 36 fathoms ("Albatross" station 

 2934). 



Distribution. — Monterey Bay or Santa Catalina Island; and from San Pedro 

 to San Diego, California, to a depth of 36 fathoms; also northwest of Cerros 

 Island, Lower California, 58 fathoms. 



Bemarlcs. — It is through the kindness of Miss Rathbun that I am able to here 

 unite Anasimus and Erileptus. In working over material of these genera collected 

 by the Venice Marine Biological Station she discovered their identity; Erileptus 

 spinosus proved to be the male of Anasimus rostratus. 



Genus Oregonia Dana 



Carapace flattened, not spinose. Rostrum consisting of two long, slender, con- 

 tiguous spines. Postocular spine present, prominent. Chelipeds rather slender, 

 length variable. Ambulatory legs of moderate length, penultimate joint similar to 

 preceding one, not dilate and compressed. 



Oregonia gracilis Dana 



Oregonia gracilis Dana, Amer. Jour. Sci. (2), 11, 270, 1851; Crust. U. S. 

 Expl. Exped., 1, 106, 1852, pi. 3, fig. 2, 1855; Doflein, S. B., Math.-phys. 

 Klasse, K. Abh. der Bayer. Akad. Wiss., 29, 183, 1899; Holmes, Occas. 

 Papers Calif. Acad. Sci., 7, 19, 1900; Eathbun, H. A. E., 10, 171, 1904; 

 Way, Puget Sd. Mar. Sta. Publ., 1, 369, fig. 20, 1917. 



Fig. 122. Oregonia gracilis, <$ ; a, dorsal view, X % ; o, ventral view of 

 anterior portion, X 1% (after Dana). 



Characters. — Carapace subtriangular, more or less setose and roughened by 

 minute prominences; median, cardiac, and branchial regions tumid. Rostrum 

 bifid, composed of two long, slender, contiguous spines; postocular spine promi- 

 ment, slender, acute, inclined forward and situated some distance behind the orbit. 



