100 



U.S. NATIONAL MUSEUM BULLETIN 258 



Figure 10. — Oligochinus lighti, new genus, new species, female, 8.0 mm., station 42-G-3: 

 a, maxilliped; b,c,d, uropods 1, 2, 3; e, pereopod 5;/,£, gnathopods 1, 2; h, telson. 



species (135 per sq. m.); algal holdfasts, scarce; coralline algae, scarce. 

 cayucos: Phyllospadix-yelvetiid grid, abundant (568 per sq. m.); 

 polychaete tubes and sponge, rare; sponge, rare, hazard cannon: 

 kelp holdfasts, moderately abundant; algal turf on platform, most 

 abundant (2677 per sq. m.); coralline algae, abundant; edge of ledge 

 in sparse algae, most abundant; sponge and tunicates, scarce; Egregia 

 holdfast, second most abundant, goleta: Phyllospadix, rare. 



Distribution. — Pescadero Point, California (Prof. Light) to Goleta, 

 California, intertidal. 



Colomastigidae 



Colomastix pusilla Grube 



Colomastix pusilla Grube : J. L. Barnard, 1955a, pp. 39-42, fig. 20 (with references) ; 

 1959, p. 19.— Ruffo, 1959, pp. 3-4. 



Material. — cayucos: sponge, rare, corona del mar: sponge, 

 Spheciospongia sp., moderately abundant; Phragmatopoma masses, 

 rare. n. laguna beach: Barnard station 16, August 31, 1950, abun- 

 dant in sponge, Leucetta losangelensis de Laubenfels. 



