538 BULLETIN 1S8, UNITED STATES NATIONAL MUSEUM 



Such a course would preclude the acceptance of Vaimosa (1906) as a 

 synonym of Mugilogohius as was done by Jordan, Tanaka, and Snyder, 

 and would make the latter a synonym of the former. It may be of 

 interest to record Dr. Jordan's later views on this question, as em- 

 bodied in a persona] letter to the writer dated April 24, 1925 : "I de- 

 cided at one time that Vaimosa was not distinct from MugilogohiuH of 

 Japan. Later study ct)iivinces me I was mistaken." 



Three species of Vaimosa from Thailand may be characterized as 

 follows : 



!«. Scales in longitudinal series 37, in transverse series 13, in predorsal region 

 18; dorsal rays VI-I,8, anal rays 1,8; general color of body and head 

 heliotrope gray, each scale of back and side with a narrow lunate spot of 

 reddish brown; abdomen yellow-green to pale orange; 6 or 7 strongly 

 curved parallel dark brown cross lines extending across under side of 

 head, the first immediately behind lower lip; dorsal fins with transverse 

 bands of heliotrope gray, white, and dark purplish gray; caudal fin pale 

 apple green, with 7 or 8 curved, wavy, cross stripes of heliotrope 

 gray ^ ^ rambaiae 



\h. Scales in longitudinal series 27 to 31, in transverse series 8, in predorsal re- 

 gion 11 or 12 ; dorsal rays VI-I,7, anal rays, 1,7 ; general body color light 

 yellowish green ; back and sides with numerous blackish brown lines some 

 of which form about 6 or 7 irregular cross bands which meet on back ; ab- 

 domen dull orange; dorsal fins with black bands, blotches, and series of 

 spots ; caudal fin with a dark vertical bar at base and immediately behind 

 it a pair of rounded blue-black spots chulae 



Ir. Scales in longitudinal series 23 to 26, in transverse series 8, in predorsal 

 region 6 or 7 ; dorsal rays ¥1-1,6, anal rays 1,6 or 1,7 ; general color pale 

 brown, lighter below ; 5 dark brown saddles alternating with a series of 

 dark bars along side ; first dorsal pale, with a blackish area posteriorly ; 

 second dorsal pale, with small dark spots on each ray ; caudal with 4 or 5 

 curved transverse dark cross bars siamensis 



VAIMOSA RAMBAIAE. new species 



Plate 9, a 



Description. — Body moderately compressed, the depth about 5 in 

 standard length; caudal peduncle rather long, its least depth 2 in its 

 length and 1.8 in length of head ; head blunt, slightly depressed, 4 in 

 length, its width 0.8 its length ; eye equal to snout, 5 in head ; mouth 

 rather small, somewhat oblique, maxillary extending under anterior 

 part of eye; teeth small, pluriserial, none greatly enlarged. 



Squamation : Scales feebly ctenoid, becoming smaller and crowded 

 anteriorly ; about 40 in longitudinal series, 12 in transverse series, 19 

 predorsal to posterior margin of eyes, and 12 circumpeduncular; 

 opercle covered with large thin scales; skin of head deficient in con- 

 spicuous pores but marked by prominent pajjillae, one line extending 

 from snout over posterior nostril and over eye to a point behind eye 



