120 U.S. NATIONAL MUSEUM BULLETIN 258 



Other Kinds of Elasmopus rapax in the Literature 



1. Sars, 1895, pi. 183: Norway. Male gnathopod 2 palm with 3 

 processes, a rounded one at hinge closely adjacent to a narrow 

 conical process, defining corner with a similar conical process; 

 pereopodal dactyls weakly constricted; third pleonal epimeron 

 rounded-quadrate posteriorly and sparsely serrate; article 2 of 

 pereopod 5 poorly serrate and setulose posteriorly, nearly smooth; 

 telsonic apices protruding smoothly medially, with 3 spines displaced 

 laterally; inner ramus of uropod 3 not much shorter than but much 

 narrower than outer. 



2. J. L. Barnard, 1955a, fig. 5 and Walker, 1916: Hawaii and Brazil. 

 Male gnathopod 2 palm like that of Sars (1895) but developing into 

 a terminal adult with an additional palmar process on lateral 

 surface of palm, very young specimens having a ridge but not a 

 process at defining corner (like E.r. mutatus) ; telsonic apices either 

 like Sars (1895) or evenly and moderately to broadly incised, 

 with 4 long spines not strongly displaced laterally; second articles 

 of pereopod 5 with or without long setae; an extreme aberrancy 

 occurred on specimens from Honolulu Aquarium, with females 

 duplicating male second gnathopods and with telsonic lobes incised 

 apically. Uropod 3 and pereopodal dactyls not described. 



3. Shoemaker, 1933a: Caribbean. Female with uncleft telson. 



4. Chevreux and Fage, 1925: France. Like the Alamitos Bay form 

 but article 2 of pereopod 5 lacking setae. 



Special material. — Entrada Pt., Bahia Magdalena, Baja Cali- 

 fornia, in algae, May 2, 1950, coll. Dr. John L. Garth and J. L. Barnard 

 (2). "Velero" station 1042, Tiburon Island, Gulf of California, shore, 

 1940 (2 forms, 15 specimens). "Velero" station 1218, Laguna Beach, 

 California, shore, 1941 (one specimen, E. rapax serricatus). 



Elasmopus rapax mutatus J. L. Barnard 



Elasmopus rapax mutatus J. L. Barnard, 1962b, pp. 96-98, fig. 18. 



Material.- — carmel: cobble-pelvetiid grid, second most abundant 

 species (350 per sq. m.); coralline algae, abundant, cayucos: Phyllo- 

 spadix-pelvetiid grid, moderately abundant (123 per sq. m.). hazard 

 canyon: algal turf on platform, moderately abundant (97 per sq. m.); 

 kelp holdfasts, abundant; sponge and tunicates, scarce; Egregia hold- 

 fast, most abundant species, pt. dumb: short-tufted brown algae on 

 vertical ledge face, abundant (197 per sq. m.); sandy sponge, very 

 abundant; encrusted holdfast, very abundant, corona del mar: 

 Phyllospadix-coraMme grid, second most abundant species (3228 per 

 sq. m.); calcareous worm tubes, scarce; red-browm algae below water, 

 moderately abundant; sponge, very abundant, la jolla: short-tufted 

 red algae, very abundant (1060+ per sq. m.); underrock grid, rare. 



