218 U.S. NATIONAL MUSEUM BULLETIN 258 



section followed by a rounded excavation and distally bearing the 

 small, flat, serrated, and toothed hinge process. 



Holotype. — AHF No. 614, male, 2.5 mm. 



Type locality. — Station 42-T-7, Hazard Canyon, California, 

 December 8-9, 1961, wash of Egregia holdfasts. 



Relationship. — This species differs from Stenothoides bicoma J. L. 

 Barnard (1962c), the only other species of the genus known from 

 California (in depths of 11 to 110 m.), by the very short antennae, 

 the stout first gnathopod, and the lack of spines on its telson. 



All other species of the genus are believed to have a mandibular 

 palp. The only other species that S. burbanki approximates is $. 

 slastnikovi (Gurjanova, 1948, see 1951) of the Bering Sea and in 

 which gnathopods 1 and 2 are almost identical in shape to those 

 at hand, but the first gnathopod of $. slastnikovi has several very 

 thick setae on the palmar area rather than short, stout spines, and 

 the telson bears spines. Apparently the short antennae are similar. 

 The new species may deserve only subspecific separation from M. 

 slastnikovi. 



Material. — carmel: tunicates and sponges, rare, hazard canyon: 

 algal turf on platform, scarce (44 per sq. m.) ; Egregia-Laminaria 

 holdfasts, scarce; Phyllospadix on sand, scarce; coralline algae, 

 scarce. 



Stenula incola, new species 



Figures 64, 65 



Diagnosis. — Upper lip deeply incised, lobes subquadrangular; 

 mandibular palp of the elongated form in the genus; eyes well- 

 developed, circular; lateral cephalic lobe small, narrow, subacute; 

 antenna 1 extending only as far as distal end of peduncle of antenna 

 2; gnathopod 1 with palm of condition intermediate between distinct 

 subchelation and complete simplicity, poorly defined by discrete 

 spine, article 6 proximally broad; gnathopod 2 of adult male with 

 large, stout sixth article, palm oblique, longer than posterior margin 

 of article 6, bearing flat area with 6 large serrations increasing in 

 size posteriorwards at hinge area, followed by trapezoidal excavation 

 defined by large cusp; coxa 4 very large, long, subovate, ventrally 

 sinuous; pereopods 1-2 dissimilar to each other in structure, first 

 slender, with articles 4, 5, 6 successively slightly longer, second 

 with stout and apically broadened article 4, article 5 shorter than 

 either 4 or 6 and intermediate in width; article 6 slightly longer 

 than axis of 4; article 2 of pereopod 4 of medium expansion, that 

 of pereopod 5 very broad, subcircular; fourth articles of pereopods 

 3-5 successively broader and more strongly produced distally; 

 dactyls of all pereopods armed on inner edges with small denticles, 



