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U.S. NATIONAL MUSEUM BULLETIN 258 



Figure 35. — Megamphopus martesia J. L. Barnard, female, 3.0 mm., "Velero" station 

 6181, Bahia de San Cristobal, Baja California: a, b, antennae 1, 2; c, d, gnathopods 1, 2. 

 Male holotype, 3.0 mm.: e, gnathopod 1;/, medial view of gnathopod 2; g, lateral view 

 of gnathopod 2; h, i, j, coxae 3, 4, 5. Female, 3.0 mm., "Velero" station 6192, Bahia de 

 Playa Maria, Baja California: k, I, m, pereopods 3, 4, 5. Male, 3.5 mm., "Velero" station 

 5737, southern California: n, cephalon; o, gnathopod 2. 



Material. — cayucos: Phyllospadix-pelyetud grid, third most 

 abundant species (1671 per sq. m.); buried cobbles, rare, goleta : 

 Macrocystis holdfast, 3 m., abundant; submerged log, 8 m., abundant. 

 corona del mar: Phyllospadix-coralline grid, moderately abundant 

 (2 + 51 juvs. per sq. m.); calcareous worm tubes, most abundant 

 species (including juveniles); Laminaria holdfast, abundant; Phrag- 

 matojjoma masses, most abundant species; sponge, Spheciospongia 

 sp., abundant, la jolla : Phyllospadix-cor&Mine grid, fourth most 

 abundant species (935 per sq. m.); red algal platform, abundant 

 (22 + 614 juvs. per sq. m.); underrock substrate, abundant (2 + 176 

 juvs. per sq. m.); coralline algae, abundant. 



