342 U.S. NATIONAL MUSEUM BULLETIN 2 02 Vol. 2 



Atoll, Enjm Island, channel reef, August 1, 1947, S-46-483, Schultz, 

 Brock, and Hiatt, 1 specimen, 42 mm.; USNM 142168, Bikini Atoll, 

 Bikini Island, western tip, August 18, 1947, S-42-533, Brock and 

 Schultz, 2 specimens, 35 to 67 mm.; USNM 142169, Bikini Atoll, 

 Namu Island, ocean reef, August 7, 1947, S-1019, Brock, Hiatt, and 

 Schultz, 1 specimen, 19 mm.; USNM 142178, Eniwetok Atoll, Eniwe- 

 tok Island, ocean surf, May 20, S-46-159, Schultz, 8 specimens, 46 

 to 63 mm.; USNM 142181, Eniwetok Atoll, Mui Island, ocean reef. 

 May 28, S-46-186, Schultz, 1 specimen, 20 mm.; USNM 142180, 

 Eniwetok Atoll, Rigili Island, lagoon reef. May 30, S-46-189, Schultz, 

 5 specimens, 49 to 82 mm.; USNM 142179, Eniwetok Atoll, Aaraan- 

 biru Island, ocean reef, June 3, S-46-198, Schultz, 13 specimens, 32 

 to 56 mm.; USNM 142177, Rongerik Atoll, Bock Island, ocean reef, 

 April 24, S-46-113, Brock and Marr, 12 specimens, 23 to 71 mm.; 

 USNM 142176, Rongerik Atoll, Bock Island, ocean reef, June 27, 

 S-46-237, Schultz and Herald, 6 specimens, 32 to 56 mm.; USNM 

 142174, Rongelap Atoll, Arbor Island, June 16, S-46-214, Schultz, 

 39 specimens, 16 to 58 mm.; USNM 142175, Rongelap Atoll, Enybar- 

 bar Island, ocean reef, June 18, S-46-216, Schultz, 178 specimens, 23 

 to 83 mm.; USNM 142173, Rongelap Atoll, Tufa Island, ocean reef, 

 July 18, S-46-260, Herald and Brock, 5 specimens, 22 to 53 mm.; 

 USNM 142172, Kwajalein AtoU, Ennylabegan Island, lagoon reef, 

 Sept. 1, S-46-397, Herald, 2 specimens, 40.5 to 42.5 mm. 



Description. — Counts made on the holotype and one paratype are, 

 respectively: Dorsal rays XIII,15;XIII,1 5; anal 11,16; 11,16; pectoral 

 always 14 with lower 5 rays thickened or enlarged; branched caudal 

 5+4; and pelvics 1,4. Orbital tentacle single, with 3 to 6 cirri on 

 inner edge and 1 to 3 on outer edge, except sometimes no cu'ri are 

 developed in young 25 mm. or shorter; a single nuchal cirrus on each 

 side; nasal flap with 6-8 and 6-6 cirri. 



Head 3.8 to 4.2; greatest depth 5.0 to 5.2; longest pectoral ray 4.3 

 to 4.7; snout tip to anus 2.2; anal fin base 2.3 to 2.4; all in standard 

 length. Eye 3.5 to 5.0; snout 2.5 to 3.0; postorbital length of head 

 1.6 to 1.7; greatest depth of body 1.3 to 1.4; least depth 2.5 to 3.1; 

 longest pectoral ray 1.0 to 1.2; longest dorsal spine 2.2 to 2.3; all in 

 length of head. Fleshy interorbital space 2.2 to 2.5 in eye. 



The characters of Entomacrodus plurifilis marshallensis, except 

 for the number of soft rays in dorsal and anal fins, are the same as for 

 E. p. plurifilis and need not be repeated here. Table 112 gives the 

 counts made for both subspecies, and an examination of that data 

 indicates a distinct population in the Marshall Islands. About 71 

 percent of the specimens of E. p. marshallensis have 15 soft dorsal 

 rays and about 51 percent 16 soft anal rays whereas E. p. plurifilis, 



