CALIFORNIA STALK-EYED CRUSTACEA. 131 



" Near San Francisco" (Stimpson); Farallon Islands! 

 Victoria (Newcombe). 



Easily recognized by the remarkable foramen between 

 the chelipeds and the first ambulatory legs. 



Genus Lithodes Latr. 



Carapace broad, more or less depressed and spiny. Rostrum generally 

 prominent and armed with spines. The large basal segment of the abdo- 

 men may be entire or composed of three or more plates; the three follow- 

 ing segments are furnished with median, lateral, and marginal plates. 



Lithodes Rathbuni Benedict. 



Lithodes Rathbuni BENEDICT, Proc. U. S. Nat. Mus., Vol. XVII, 1894, p. 



482. * 



Paralithodes ? Rathbuni BOUVIER, Ann. Sci. Nat. (8), Tome I, 1896, p. 23. 



Carapace armed with four spines on the gastric area and four (two long 

 and two short ones) on the cardiac; branchial region with six spines. 

 Rostrum composed of five branches, the main stem sharply bent upward 

 and deeply bifurcate; the lower spine projecting nearly horizontally. The 

 right cheliped is rather slender; the carpus has more than twelve spines; 

 palm with two rows of four spines each on the median, outer surface. 

 Ambulatory legs slender and very spiny. Antennal acicle very long and 

 slender. 



Known from a single male specimen taken off San 

 Simeon Bay, Calif., in 211 fathoms. 



Lithodes calif orniensis Benedict. 



Lithodes californiensis BENEDICT, Proc. U. S. Nat. Mus., Vol. XVII, 1894, 



p. 483. 

 Paralithodes 1 californiensis BOUVIEB, Ann. Sci. Nat. (8), Tome I, 1896, 



p. 23. 



Very closely allied to L. Rathbuni, but having the spines on the cara- 

 pace shorter and stouter and the rostrum simply bifid instead of divided 

 into two, well-developed horns. 



