CALIFORNIA STALK-EYED CRUSTACEA. 123 



Phyllolithodes bicornis (Bate). 



Petalocerus bicornis BATE, Proc. Zool. Soc. London, 1864, p. 664; in 



Lord's Nat. in Vancouver's Is., Vol. II, 1866, p. 271. 

 Phyllolithodes bicornis BOUVIEB, Ann. Sci. Nat. (8), Tome I, 1896, p. 22. 



This species is evidently closely allied to papillosus. The carapace is 

 "anteriorly produced into two, horizontal, horn-like processes. The sec- 

 ond pair of antennae have a compound scale, consisting of two large and 

 two short compressed processes, and a third joint is furnished with two or 

 three sharp, short strong processes." This species differs from papillosus, 

 according to Bate, "in having a horizontal, bifurcate rostrum to the 

 carapace, being more distinctly tuberculated, and in the pereopoda being 

 more strongly spinated." 



Color, yellow, with purple between the tubercles. 



" Dredged in Esquimalt Harbor in ten fathoms of 

 water." 



The character of the rostrum does not distinguish this 

 species from papillosus, as I have seen in the latter 

 species all stages between prominent rostral spines and 

 short, blunt knobs. Of the other distinguishing char- 

 acters I cannot speak. Had not Bate specimens of 

 papillosus from near the same locality for comparison, 

 one would be inclined to regard this species as a syno- 

 .nym of the preceding one. 



Genus Cryptolithodes Brandt. 



Carapace transverse, nearly smooth, high in the middle and produced 

 laterally into two wing-like expansions which cover the ambulatory legs. 

 Eostrum broad, flattened, deflexed. Antero-lateral margins arcuate, often 

 dentate, and meeting the postero-lateral margins at an angle. Ocular 

 peduncles quite slender and approximated at their enlarged bases. Au- 

 tennules separated by a considerable interval, the first joint enlarged. 

 First basal joint of the antennae very short; second joint with a crest above 

 aiid a large process on the outer side; acicle broad and laminate; flagellum 

 rather short. Ischium of the maxillipeds small, the inner margin denticu- 

 lated; merus with the outer surface flattened; joints of the palp compressed. 

 Chelipeds unequal and more or less covered by the carapace; hands stout, 

 compressed, the fingers excavated within. The three anterior pairs of 



