AiiT. 7 NEW SIAMESE FISHES SMITH 47 



Color: Entire body a uniform reddish-brown without any mark- 

 ings; head a somewhat lighter and richer brown, with cheeks and 

 opercles traversed by about 8 narrow, oblique, widely separated 

 dark brown stripes extending downward and forward, these stripes 

 margined by a lighter brown than on the interspaces; a few dark 

 brown spots on upper lip and top of head; fins plain light brown, 

 with following exceptions: the anal shows a dark brown margin and 

 three dark brown stripes parallel with the free border; the ventral 

 membranes are finely barred with blackish-brown ; and the pectorals 

 in life have a row of indistinct dark brown rounded spots across the 

 base of the rays. 



Type. — A sj^ecimen 13.5 cm. long over all, 10.5 cm. to base of caudal, 

 taken in the estuary of the Chantabun River at Lem Sing (Lion 

 Point), Southeastern Siam, July 17, 1928. Cat. No. 90322, 

 U.S.N.M. 



Remarks. — This species is known from a single example. It may 

 be readily distinguished by its peculiar physiognomy, which strongly 

 suggests a Periofhthalnius^ with its prominent eyes situated far for- 

 ward on the upper profile of the large head. 



APOCRTPTODON MALCOLMI. new species 



Description. — Body very elongate, cylindrical anteriorly, com- 

 pressed posteriorly, the depth contained 6.4 times in standard length ; 

 head broad and somewhat flattened above, the breadth slightly more 

 than depth, the length contained rather more than 4 times in length 

 of body ; snout broadly rounded, its length 4 times in head ; eyes on 

 top of head but directed more laterally than dorsally, 1.5 times in 

 snout 6 times in head ; interorbital space about 0.5 eye ; mouth large, 

 nearly horizontal, lower jaw included, maxillary almost 0.5 length 

 of head and reaching 1 eye-diameter behind vertical from posterior 

 border of eye ; width of mouth equal to length of gape ; teeth in upper 

 jaw widely spaced, club-shaped, inclined outward, the 3 median teeth 

 on each side enlarged, curved, and fang-like; teeth in lower jaw 

 horizontal, bifid, and 14 or 15 on each side, increasing gradually in 

 size from symphysis outward, the outermost under middle of eye; 

 post-symphyseal canines small ; caudal peduncle short, its least depth 

 greater than its length and 2.8 times in head ; scales in longitudinal 

 series 60, in transverse series (between second dorsal and anal) 13, 

 predorsal scales 26, body scales larger posteriorly, nape and side of 

 head as far forward as eyes completely covered with small scales, 

 the squamation being defined by an oblique line extending from 

 i)osterior margin of eye to antero-inferior point of opercle. 



Fins : Dorsal rays VI-1,22, the two fins close together and connected 

 by a low membrane ; dorsal spines with elongate tips, their length 

 increasing gradually to fourth whose length exceeds depth of body 



