GAMMARIDEAN AMPHIPODA 81 



Ampeliscidae 



Ampelisca lobata Holmes 



Ampelisca lobata Holmes, 1908, pp. 517-518, fig. 25. — Shoemaker, 1942b, p. 



7.— J. L. Barnard, 1954b, pp. 11-14, pis. 5, 6; 1964a, p. 214. 

 Ampelisca articulata Stout, 1913, pp. 639-640. 



Material. — cayucos: Phyllospadix grid (34 per sq. m.); cobbles; 

 Macrocystis holdfast, rare, goleta: Macrocystis holdfast, 3 m., 

 abundant; rock outcrop, 8 m., rare; submerged log, 8 m., abundant. 

 la jolla: short-tufted red algae (7 per sq. m.); Phyllospadix-comMme 

 grid (4 per sq. m.); underrock grid (4 per sq. m.). 



Distribution. — Caribbean Sea; eastern Pacific Ocean from Ecua- 

 dor to Puget Sound, 0-183 m. 



Collections at hand from Puget Sound represent a new northern 

 record. Apparently this species occurs at greater depths in the tropics 

 than it does in higher latitudes but its strong association with plants, 

 a strange habit for an ampeliscid, is probably correlated with its 

 highest densities in very shallow waters. At Cedros Island, Baja 

 California, it is replaced in the intertidal by its close relative, A. 

 schellenbergi Shoemaker, which is more strongly confined to tropical 

 waters than is A. lobata. 



Ampelisca pugetica Stimpson 



Ampelisca pugetica Stimpson, 1864, pp. 158-159. — J. L. Barnard, 1954b, pp' 



49-51, pis. 35, 36; 1960a, p. 31, fig. 9; 1964a, p. 215. 

 Ampelisca californica Holmes, 1908, pp. 513-515, fig. 23. 

 Ampelisca gnathia Barnard, 1954b, pp. 46-48, pis. 33, 34. 



Material. — goleta: Macrocystis holdfast, 3 m., rare. 



Distribution. — Caribbean Sea; eastern Pacific Ocean from Peru 

 to Puget Sound, Washington, 0-183 m. An abundant species of 

 soft bottoms in mid-depths of the Californian coastal shelf. 



Ampelisca schellenbergi Shoemaker 



Ampelisca schellenbergi Shoemaker, 1933a, pp. 3-5, figs. 1, 2; 1942b, p. 9 — J. L. 

 Barnard, 1954b, pp. 14-16, pis. 7, 8. 



Material. — cayucos: Phyllospadi x-pe\vetiid grid, abundant (56 

 per sq. m.). la jolla: Phyllospadix-coraWme grid, rare (18 per sq. 

 m.); calcareous sponge (rare). 



Distribution. — Tropical pan-America, occurring as far north as 

 Cayucos, California, in the Pacific Ocean. The abundance of this 

 tropical species at Cayucos is surprising, considering its low frequency 



