. Bulletin - United States National Museum. Science. -[]^4 BULLETIN 16G, UNITED STATES NATIONAL MUSEUM Material examined.—As follows: Puerto Rico: Off Vieques; Ciilebritas lighthouse NE.}{ N., 10 miles; 15 fathoms; Co.; February 8, 1899; station 6091, Fish Hawk; 1 female, holotype (23777). Barbados: 1 mile southwest of Pelican Island; 38 fathoms; fne. Co. frag.; May 13, 1918; station 1, Barbados-Antigua Expedition, State University of Iowa; 1 female, same size as type (S. U. I.). CLYTHROCERUS PLANUS Rathbun FiGUUE 29; Plate 34, Figures 1, 2 Cydodorippe plana Rathbun, Amer. Nat., vol. 34, p. 51

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. Bulletin - United States National Museum. Science. -[]^4 BULLETIN 16G, UNITED STATES NATIONAL MUSEUM Material examined.—As follows: Puerto Rico: Off Vieques; Ciilebritas lighthouse NE.}{ N., 10 miles; 15 fathoms; Co.; February 8, 1899; station 6091, Fish Hawk; 1 female, holotype (23777). Barbados: 1 mile southwest of Pelican Island; 38 fathoms; fne. Co. frag.; May 13, 1918; station 1, Barbados-Antigua Expedition, State University of Iowa; 1 female, same size as type (S. U. I.). CLYTHROCERUS PLANUS Rathbun FiGUUE 29; Plate 34, Figures 1, 2 Cydodorippe plana Rathbun, Amer. Nat., vol. 34, p. 519, 1900. Clythrocerus planus Rathbun, Harriman Alaska Expedition, vol. 10, p. 168, pi. 9, fig. 4, 1904 [type locality, southern California at Catalina Harbor (probably); type, U.S.N.M. no. 14256]. Diagnosis.—Carapace finely and appendages coarsely granulate. Two lateral teeth or spines, the distance between them greater than between the foremost tooth and the orbital tooth.. Figure 29.—Clythrocerus planus, male: Dorsal view, X12. Description.—Carapace subcircular, a little broader than long; dorsally flat, finely granulate, granules larger toward outer margin; gastric and cardiac-intestinal regions bounded by deep grooves. Front occupied by two triangular lobes, each tipped with a blunt tooth, and separated from each other by a broad V-shaped sinus, which is prolonged on the dorsal surface by a broad, shallow depres- sion continued to gastric region; outer margin of each lobe slightly concave. Outer orbital tooth narrow, blunt, well-marked, directed obliquely outward. A tooth a little in front of middle of lateral margin is somewhat larger and directed forward and slightly outward. A much smaller triangular tooth at about one-third the distance from orbital to branchial tooth. Antennules hidden under carapace; antennae moderately enlarged. Anterior end of buccal cavity and. Please note that these images are extracted from scanned page images that may have been digitally

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