GAMMARIDEAN AMPHIPODA 165 



Leucothoides pacifica J. L. Barnard 



Figure 24 n-r 

 Leucothoides pacifica J. L. Barnard, 1955b, pp. 26-28, figs. 1, 2 e, h, n; 1959, p. 21. 



This species was distinguished from Leucothoides pottsi Shoemaker 

 (1933b) especially by the bulging palm of male gnathopod 2 on the 

 assertion that Shoemaker's description was based on a male. Further 

 investigation of female L. pacifica reveals terminal development 

 of a concave palm similar to that of L. pottsi and casts doubt on 

 the sex of the type of L. pottsi. Notwithstanding, the female gnathopod 

 2 of L. pacifica has a shorter posterior edge of article 6 than that 

 of L. pottsi, the lateral cephalic lobes are rounded, not quadrate, 

 and the peduncle of uropod 1 is longer than that of L. pottsi. 



Material. — carmel: algal holdfasts, rare; tunicates and sponges, 

 rare, cayucos: buried cobbles, scarce; Macrocystis holdfast, rare; 

 sponge, rare, goleta: submerged log, 8 m., rare. 



Distribution. — Carmel to Newport Bay, California, 0-8 m. 



Liljeborgiidae 



Liljeborgia geminata, new species 



Figure 42 



Liljeborgia kinahani (Bate): J. L. Barnard, 1962b, p. 83; 1964a, p. 228 (not 

 Bate, see Stebbing, 1906). 



Diagnosis. — With the aspect of L. kinahani (Bate, see Sars, 

 1895, pi. 188, fig. 1); eyes very large, irregular in outlines; lateral 

 cephalic lobes narrow, strongly projecting; antenna! flagella with 

 numerous short, broad articles; coxa 1 expanded distally, coxa 3 

 narrowed distally, coxa 4 with broad, moderately deep posterior 

 excavation; gnathopod 1 with article 2 broadest at middle, palms 

 of gnathopods evenly convex, although gnathopod 2 in some large 

 specimens (4.5+ mm) having faint suggestion of sinuous excavation; 

 posterior edges of sixth articles of pereopods 1-2 with 6-8 small spines; 

 second articles of pereopods 3-5 relatively broad, posterior edges 

 serrate, distal serrations enlarged; third pleonal epimeron with dis- 

 tinct sinus above small postero ventral tooth, epimera 1-2 with tooth 

 at postero ventral corners; uropodal spination shown in figures; ple- 

 onites 1-2 dorsally with 3 small teeth each, middle tooth largest; 

 pleonite 3 lacking dorsal teeth, with medial slit; pleonites 4-5 each 

 with or without small single tooth; telson with relatively symmetrical 

 apical notches on each lobe, each notch with one long spine. 



The largest specimen available is a male, 8.7 mm., from station 

 1340; it fits the above diagnosis but lacks the distinct sinus above 

 the tooth on the third pleonal epimeron, has a broader cephalic 

 lobe, very short telsonic spines and larger serrations of pereopods 3-5. 



