130 U.S. NATIONAL MUSEUM BULLETIN 25 8 



hazard canyon: Egregia holdfast, rare. pt. dume: loose rocks, scarce. 

 palos verdes peninsula, near Bluff Cove, Nov. 11, 1946, coll. Dr. 

 John L. Mohr; Whites Point, near Pt. Fermin, in algae, Oct. 12, 1947, 

 coll. Dr. J. L. Mohr. morro beach, Orange County, April 4, 1947, 

 coll. Dr. J. L. Mohr. corona del mar: underrock substrate, abundant 

 (14 per sq. m.); Phyllospadix-coralline grid, scarce (46 per sq. m.); 

 loose rocks, abundant; calcareous worm tubes, abundant; Phragma- 

 topoma masses, rare, la jolla: underrock substrate, moderately- 

 abundant (38 per sq. m.); north of Bird Rock, tidepool, Nov. 18, 1948, 

 coll. Dr. Thomas E. Bowman, baja California at the following 

 Velero "IV" stations:2022 and 2025, 10 miles W of Pta. Malarrimo, 

 Sebastian Viscaino Bay, 27°49'00" N, 114°43'00" W, shore; 2066, 

 Pta. Eugenia, shore; 1265, 2 miles SE of Cedros Island, 55 fath. ; 

 1976, middle San Benito Island, shore, samples 1976 to 2066 coll. 

 by Dr. John S. Garth and J. L. Barnard. 



Distribution. — Friday Harbor, Washington, to Cedros Island, 

 Baja California, 0-101 m. 



Netamelita cortada J. L. Barnard 



Netamelita cortada J. L. Barnard, 1962b, p. 113, fig. 23. 



Material. — corona del mar: tunicate colonies at base of Phyl- 

 lospadix, rare. 



Distribution. — Southern California, intertidal to 20 m. 



Hyalidae 



Allorchestes anceps, new species 



Figures 25, 26 



Diagnosis of male. — Antennae relatively short for an allorchestes, 

 antenna 2 slightly longer than antenna 1, both pairs of antennae 

 bearing dense bundles of short setae; palp of maxilla 1 reaching end 

 of outer plate; article 5 of gnathopod 1 shorter than article 6, posterior 

 lobe symmetrical, broad, apically rounded, article 4 with large, 

 posterodistal process, article 6 relatively stout, slightly expanding 

 distally, posterior edge armed with bundle of setae, palm straight, 

 slightly oblique, defined by 2 stout spines, dactyl slender, weakly 

 curved; gnathopod 2 with article 2 slightly expanding distally and 

 forming a lamellar lateral lobe, posterior lobe of article 5 not curved, 

 slender, posterior edge of article 6 with one setal bundle near palm, 

 posterior edge and palm equal in length; all pereopodal dactyls bearing 



Figure 25. — Allorchestes anceps, new species, holotype, male, 8.0 mm., station 42-T-5: 

 a, pleonal epimera 1-3, left to right; b, gnathopod 2; c,d, maxillae 1, 2; e, gnathopod 1; 

 /, maxilliped. Male, 4.6 mm.: g, head. 



