48 PROCEEDINGS OF THE NATIONAL MUSEUM vol.79 



and equals length of head without snout, fifth and sixth spines 

 shortest ; second dorsal rather low, the rays of nearly equal length, 

 0.5 head, last ray shortest, its base separated from caudal by a space 

 less than O.o depth of peduncle : the pointed caudal somewhat longer 

 than head: anal 1,21, similar to second dorsal, its origin posterior 

 to second soft ray of dorsal: ventrals somewhat longer than the 

 bluntly-pointed pectorals and extending half way to anal papilla. 

 Color: Light brown above, bluish-white on abdomen and under 

 side of head; head and body with numerous small round black 

 spots of irregular distribution, a few spots extending on base of soft 

 dorsal fin : a series of 6 diffuse round dark brown blotches extending 

 along middle of side from head to caudal, and 5 vertically elongate 

 similar blotches extending downward from median line of back, 

 alternating with the round blotches, several obscure blotches on top 



Figure 22. — Apocryptodon itALCOLMi 



of head: first dorsal unmarked: caudal dusky% with faint cross- 

 lines of brown spots; and with dusky edge; pectorals with blackish 

 lower half. 



Type. — This species is as yet known from a single specimen, 7.5 

 cm. long, taken June 14, 1928, at the mouth of the Chantabun River, 

 Southeastern Siam. It is a female with well-developed ovaries. 

 Cat. Xo. 90323. U.S.X.M. 



Remarks. — Of the half dozen species of Apocryptodon known 

 from India, Malay Archipelago, and Philippines, this species ap- 

 pears to be mostly closely related to A. hleeken (Day). That form, 

 however, according to Day's description and figure, has a different 

 shaped head, longer maxillary (extending to preopercle), cheeks 

 densely scaled as far forward as anterior margin of eye, and differ- 

 ent coloration. 



Xamed for Dr. Malcolm A. Smith. F. Z. S., for many years 

 resident in Siam, in appreciation of his interest in, and important 

 contributions to the knowledge of, the zoologv of Siam. 



U. S. GOVERNHENT PRINTING OFFICE: 1911 



