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ALLAN HANCOCK PACIFIC EXPEDITIONS 



VOL. 18 



in the second gnathopods, witness the drawings of an ovigerous female, 

 2.5 mm, on pi. 52 fig. B. The inner plate of the maxilliped of other 

 metaphoxids has not been well figured but the condition in M. frequens 

 appears to be unique: a very slender plate with a single stout seta. 



This species and Phoxocephalus homilis n. sp., were confused by me 

 for some time, but I have reexamined all of the materials and find that 

 the gnathopod criteria are distinctive, the elongated sixth article of 

 gnathopod 1 applying to all M. frequens, while in P. homilis it is short 

 and stout. Otherwise, the two species are superficially alike and easily 

 confused. They are separated generically by the condition of the man- 

 dibular molars. 



Material examined. — 1234 specimens at 157 stations. 



Distribution. — Southern California coastal shelf and slopes, 12 to 

 115 fms. Collected on the east slope of Santa Cruz Basin, 218 to 250 

 fms. Collected at Isabel Island, Mexico. Dipnetted at Santa Barbara 

 Island. 



PLATE 52 



Metaphoxus frequens, n. sp., ovigerous female, 2.5 mm, Sta. 2444. 



Figs. A,B, gnathopods 1, 2; C, end of peraeopod 5. 

 Male, 3 mm, Sta. 2444. 



Figs. D, head; E, uropod 3. 



Female, 3.5 mm, Sta. 2444. 

 Fig. F, head. 



Female, 3.0 mm, Sta. 2444. 

 Fig. G, head, dorsal. 



