234 



U.S. NATIONAL MUSEUM BULLETIN 202 



Vol. 2 



Precision measurements were made on the holotype, and paratypes 

 and these data are recorded in thousandths of the standard length, 

 respectively. Standard length in mm. 63, 73, 41 and 31.5. 



Length of head 310; 318; 349; 375. Greatest depth 333; 329; 

 298; 336. Least depth of caudal peduncle 165; 153; 158; 159. 

 Length of snout 102; 107; 98; 102. Least width of interorbital 

 space 75; 81; 90; 89. Postorbital length of head 154; 156; 171; 

 178. Snout tip to anus 594; 534; 536; 564; and to dorsal origin 

 310; 340; 361; 384. Longest fin ray: pectoral 214; 199; 205; 

 216; pelvic 187; 181; 159; 152; second anal spine 79; 82; 90; 

 133; caudal 249; 253; 229; 254; soft dorsal 143; 144; 134; 127; 

 and soft anal 143; 137; 110; 127. Length of first dorsal spine 60; 

 60; 59; 44; and of last dorsal spine 132; 112; 110; and 133. Least 

 preorbital width 54; 52; 41; 44. 



Figure lOi.—Halichoeres biocellatus, new species, holotype, USNM 112940, from Bikini 

 Atoll. Drawn by A. M. Awl. 



Head 2.9 to 3.2; greatest depth 2.9 to 3.2; longest pectoral ray 

 4.2 to 5.0; snout tip to anus 1.7 to 1.8; snout tip to dorsal origin 2.7 

 to 3.2; all in standard length. Snout 2.9 to 3.5; eye 3.3 to 4.7; post- 

 orbital length of head 2.0 to 2.1 ; interorbital space 3.9 to 4.7; longest 

 pectoral ray 1.4 to 1.7; least depth of body 2.0 to 2.3; all in length of 

 head. Distance between anterior and posterior nasal openings 5 to 

 7 in snout. Eye 0.8 to 1.2 in interorbital space. 



Dorsal profile of head forming an angle of 55 to 65 degrees with 

 ventral contour of head; pectoral fin reaches to opposite ninth or 

 tenth lateral line pore; pelvics with outer rays elongated reaching 

 two-thirds to three-fourths the way to anus. 



Color in alcohol. — Background coloration light brownish to brown- 

 ish, with head and anteroventral part of body pale or whitish; ven- 

 trally body is pale on two smallest specimens; a narrow pale median 

 streak on body extending to caudal fin, this streak is broad on the 

 two largest specimens and extends from behind head to middle of 

 length, where it changes to brown of body; largest specimen has 



