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



SPECIMENS STUDIED 

 Saipan: October 1945, J. R. Simon, 1 specimen, USNM 132845, 39 mm. 



Description. — Dorsal rays XIII, 16; anal II, 18; pectoral 14; pelvics 

 1,4; branched caudal probably 5+4; a single, simple orbital and 

 nuchal tentacle on each side; nasal flap single. 



Head 3.9: greatest depth 4.3; longest pectoral ray 4.2; snout tip 

 to anus 2.0; anal fin base 2.5; all in standard length. Eye 4.0; snout 

 2.6; postorbital length of head 1.7; greatest depth of body 1.1; least 

 depth 2.7; longest pectoral ray 1.1; longest dorsal spine 2.3; all in 

 length of head. Fleshy interorbital space 3.1 in eye. 



Orbital tentacle, single, simple, somewhat broad at base, tapering 

 to a point, sometimes a single cirrus on inner edge, its length about 

 \% that of eye diameter; a single, simple, short nuchal cutus on each 

 side; nasal flap short, broad, without cirri; snout profile with a little 

 forward slant; middle third of edge of upper lip crenulate, the outer 

 thirds smooth; lower lip smooth edged; lateral line arched over 

 pectoral fm, then descending to midlengthwise axis, ending about 

 opposite the middle of length of anal fin base; vertical line tlu"ough dor- 

 sal origin passes through pelvic bases; dorsal fui with a deep notch over 

 last dorsal spine; membrane attaching last dorsal ray to upper edge 

 of caudal peduncle; anal origin under the base of third from last 

 dorsal spine; last anal ray without posterior membrane; pectoral 

 fins reach about to anus; anal spines small, first embedded on females; 

 tips of fh'st anal rays of adult males not swollen; posterior canines 

 minute and scarcely projecting from membrane; teeth fuie, numerous, 

 movable, of equal size in both jaws; distal margin of caudal fin 

 rounded; no cephahc crest. 



Color in alcohol. — Background coloration light brown, sides with 5 

 or 6 double dark bro^vn bars; head and body mottled with tiny white 

 or light tan specks and dark specks or short streaks; bases of pectoral 

 similarly marked; orbital tentacle plain dark brown; a blackish spot 

 distally between first and second dorsal spines; dorsal, anal, caudal, 

 and pectoral fins plain light brown to dusky, 



ENTOMACRODUS THALASSINUS (Jordan and Seale) 



Plate 115,D,E 



Alticus thalassinus Jordan and Seale, Bull. U. S. Bur. Fish., vol. 25 (1905), p. 



425, fig. 103, 1906 (type locality, Apia, Samoa). 

 Alticus musilae Jordan and Seale, Bull. U. S. Bur. Fish., vol. 25, (1905), p. 425, 



fig. 104, 1906 (type locality, Apia, Samoa). 



SPECIMENS STUDIED 



Bikini Atoll: 2 stations, 3 specimens, 16 to 25 mm. in standard length. 

 Rongerik Atoll: 1 station, 1 specimen, 21 mm. 



