GAMMARIDEAN AMPHIPODA 



153 



Figure 36. — Ischyrocerus sp. A, female, 3.8 mm., station 45-C-4: a, pereon and coxae; 

 b, c, gnathopods 1, 2. Male, 5.1 mm., station 39-K-l: d, head; e, uropod 3;/, coxae 3-7, 

 left to right as attached to organism; g, telson; h, i, gnathopods 1, 2; ;', k, ornamentation 

 of outer ramus of left uropod 3; /, ornamentation of outer ramus of right uropod 3. 



distinctive. The figures show the denticles as seen microscopically 

 under oil-immersion magnification; without that resolution they ap- 

 pear in figure 37c as a series of small, sharp projections. 



One might assume from Stout's (1913) description of /. parvus that 

 Ischyrocerus sp. A is identifiable with that species because of sim- 

 ilarities in short coxae and small eyes. 



Material of Ischyrocerus sp. A. — cayucos: Phyllospadix-peixetiid 

 grid, abundant (311 per sq. m.); nodose pink tunicates, rare, hazard 

 canyon: algal turf on platform, moderately abundant (122 + per sq. 

 m.); Rhodomela laryx, rare; Egregia-Laminaria holdfasts, scarce. 

 goleta: Phyllospadix-pelvetiid grid, abundant (705 per sq. m.). pt. 

 dume: Egregia holdfast, rare, corona del mar: loose rocks, rare; 



