GAMMARIDEAN AMPHIPODA 91 



6 of male gnathopod 2. Lembos audbettius J. L. Barnard (1962a) also 

 fits Stout's description of L. concavus. Presumably additional adult 

 specimens will be found in subintertidal samples and then these 

 problems can be studied. 



Material. — cayucos: buried cobbles, scarce; Macrocystis hold- 

 fast, scarce, goleta: submerged log, 8 m., rare; Macrocystis hold- 

 fast, scarce. Newport harbor: Velero stations 1449 (12), 1453 (2), 

 on floating docks, corona del mar: P hyllospadix-cor alline grid, 

 rare; soft polychaete tubes, rare; Laminaria holdfast, rare; Phrag- 

 matopoma mass, rare; tunicate colonies, rare; underrocks, scarce; 

 tunicate and polychaete tubes, scarce, la jolla: Phyllospadix-coTdil- 

 line grid, rare (15 per sq. m.). 



Microdeutopus schmitti Shoemaker 



Microdeutopus schmitti Shoemaker, 1942b, pp. 18-21, fig. 6. — J. L. Barnard, 

 1959, pp. 32-33, pi. 9; 1961, p. 180. 



Material. — cayucos: Phyllospadix holdfast, rare, goleta: 

 Macrocystis holdfast, 3 m., abundant; rock outcrop, 8 m., rare; 

 submerged log, 8 m., rare, corona del mar: Phyllospadix-coraWme 

 grid, scarce (22 per sq. m.) ; loose rocks, scarce; calcareous worm 

 tubes, abundant; soft polychaete tubes, rare; Phragmatopoma masses, 

 scarce, la jolla: P hyllospadix-cor alline grid, abundant (503 per 

 sq. m.); underrock grid, moderately abundant (38 per sq. m.); short- 

 tufted red algal platform, moderately abundant (95 per sq. m.) ; 

 coralline algae, moderately abundant; mixed red algae, scarce. 



Distribution. — Monterey Bay, California to Cape San Lucas, 

 Baja California, 0—43 m. Abundant to 18 m. on the coastal shelf 

 of southern California. 



Neomegamphopus Shoemaker 



Neomegamphopus Shoemaker, 1942b, pp. 35-36. 



Diagnosis. — -Accessory flagellum 2-articulate; peduncular articles 



1 and 2 of antenna 1 subequal in length, article 3 about 60% as long 

 as article 1; antennae 1 and 2 equal in length; mandibular palp article 

 3 much shorter than article 2, apically truncate, stout; palp article 4 

 of maxilliped poorly claw shaped, armed apically with several large, 

 short to medium setae; male gnathopod 1 with posterodistal tooth 

 on article 5 projecting along and guarding article 6, the latter much 

 narrower and shorter than article 5, poorly subchelate; gnathopod 



2 in both sexes smaller than 1, not complexly subchelate but poorly 

 subchelate, article 5 slightly longer than 6; pereopods 4 and 5 equal 

 in length; uropod 3 with rami subequal to peduncle, inner ramus 

 slightly longer than outer (!), outer ramus Particulate, article 2 

 very small and armed with 2 long setae; telson broader than long, 



