FRESH- WATER FISHES OF SIAM, OR THAILAND 



523 



GNATHOGOBIUS ALICEAE, new species 



FiGUEE 104 



Description. — Body moderately compressed ; depth about 5 in stand- 

 ard length ; least depth of caudal peduncle 1.9 in its length and 2.4 in 

 head ; head depressed, broad, flattened on top, 3.2 in standard length, 

 its width 0.75 its length; mouth large, horizontal, maxillary 1.2 in 

 head, extending to posterior margin of preopercle ; snout broad, evenly 

 rounded, 4 in head ; eyes well separated, 5 in head, 1.8 in the flat inter- 

 orbital space; teeth as in the generic description; tongue thin, with 

 rounded tip ; gill openings narrow, corresponding with base of pectoral 

 fins. 



Squamation: Body fully covered with weakly ctenoid scales be- 

 coming cycloid anteriorly, the scales extending on predorsal region tO) 

 eyes, on breast, and on base of pectorals ; thin cycloid scales on opercle ; 

 scales in longitudinal series 35 or 36, in transverse series between ori- 

 gins of second dorsal and anal fins 11, in predorsal area 17, and around! 

 caudal peduncle 12 ; cheek and opercle with prominent lines of papillae. 





Figure 104. — Gnathogohius aliceae, new species: Type (U.S.N.M. No. 119604). Drawn 



by Mrs. Alice C. Mullen. 



Fins: Dorsal rays VI-I, 7, all of moderate length; caudal fin 

 rounded, shorter than head ; anal rays I, 7, similar to second dorsal ; 

 ventrals not reaching anal opening, 1.8 in head, basal membrane weak ; 

 pectorals 0.6 length of head, pectoral rays 17 in both fins. 



Coloration : Pale yellow, scales of back and top of head dull brown, 

 each scale of sides with a yellowish brown edge ; opercle and base of 

 pectorals with small round black spots; first dorsal blackish, with a 

 narrow white edge; second dorsal with reddish brown spots on rays 

 and membranes forming irregular transverse rows ; other fins plain. 



Type and paratype.—T\\Q type (U.S.N.M. No. 119604), a male 4.7 

 cm. long, was taken in Bangkok on May 2, 1931. A paratype (U.S.N.M. 

 No. 119605), a female 3.9 cm. long, was obtained at the same place and 

 date. 



