140 U.S. NATIONAL MUSEUM BULLETIN 258 



Hyale schmidti (Heller), as figured by Chevreux (1900) under the 

 name H. camptonyx and by Chevreux (1911) and Chevreux and 

 Fage (1925), differs from H. camptonyx and H. rubra apparently by 

 the short apical setae of the maxillipedal dactyl, although there 

 are indications in the 1925 paper that the apical setae were cut off 

 in the printing of the figure. Gnathopod 1 of the male is drawn very 

 differently in the several papers. Possibly this led Iwasa (1939) to 

 identify some Japanese specimens with H. schmidti but if the repre- 

 sentation of Chevreux and Fage is correct the two populations are 

 quite different. Iwasa's specimens have most of the aspects of H. 

 rubra as figured by Hurley (1957) except for the male first gnathopod 

 which in Japanese specimens has a stouter base of article 6 and a 

 much narrower posterior lobe of article 5. In several ways Iwasa's 

 material is better identified with H. camptonyx, but from those 

 species already mentioned it differs by the shorter second male 

 antenna and from H. rubra by the poorly developed coxal cusps, 

 narrower lobes of the fifth articles of the female gnathopods, the 

 narrower space occupied by the posterior setae of the sixth articles 

 and the occurrence of a double set of setae on female gnathopod 2. 



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

 species (20 per sq. m.) ; Phyllospadix-pelvetiid grid, most abundant 

 species (365 per sq. m.) ; algal holdfasts, most abundant species; 

 coralline algae, abundant; Postelsia stipe, abundant; Ulva sp., present; 

 tunicates and sponges, abundant, cayucos: Phyllospadix-peivetiid 

 grid, most abundant species (7507 per sq. m.) ; Macrocystis holdfast, 

 rare; buried cobbles, rare; soft polychaete tubes, rare; sponge, rare; 

 Amaroucium sp., abundant, hazard canyon: kelp holdfasts, most 

 abundant species; algal turf on platform, second most abundant 

 species (419 per sq. m.) ; Egregia stipes, most abundant species; 

 coralline algae, most abundant species, goleta : Phyllospadix-pelvetiid 

 grid, most abundant species (10,300 per sq. m.) ; Anthopleura elegantis- 

 sima bed, most abundant species (but low in density) ; Egregia laevigata, 

 abundant, pt. dume: brown algae, most abundant species (4355 per 

 sq. m.); coralline algae, most abundant species (10,400 per sq. m.); 

 pelvetiid zone, most abundant species (1360 per sq. m.) ; short-tufted 

 brown algae on vertical face, second most abundant species (202 

 per sq. m.) ; Phragmatopoma masses, fourth most abundant species 

 (147 per sq. m.) ; Amaroucium sp., rare; loose rocks, abundant; 

 Egregia holdfast, most abundant species, stipes also most abundant 

 species; sandy social tunicates, rare; sponge, rare, corona del mar: 

 Phyllospadix-coroWine grid, most abundant species (9100 per sq. m.) ; 

 loose rocks, most abundant species; Egregia stipes, most abundant 

 species; tunicates, rare; sponge, rare, la jolla: Phyllospadix-coraWme 

 grid, most abundant species (4890 per sq. m.); underrock substrate, 



