ART. 7 NEW SIAMESE FISHES— SMITH 25 



under posterior part of dorsal and anterior end of adipose to below 

 lateral line, (5) similar, from anterior half of adipose nearly to anal 

 base, (6) narrow, vertical, across caudal peduncle at posterior end of 

 adipose, and (7) across base of peduncle, the first, third, fifth, and 

 seventh bands most distinct ; dorsal fin with a dark brown base and a 

 broad band on distal part extending its entire length and leaving a 

 clear narrow margin; fins otherwise plain. 



Type and paratypes. — The type is 5.2 cm. long, collected in January, 

 1927, in Klong Thalerng, near Ronpibun, Peninsular Siam. The 

 paratypes number 6, and range in length from 4.1 to 5.2 cm. Cat. No. 

 90304, U.S.N.M. ; paratypes, 90305. 



Remarks. — This strikingly marked little fish is known only from 

 the tj^pe locality'. 



This species is named for Mr. R. Havmoller, who collected the type 

 and cotypes, and has presented numerous other interesting specimens 

 to the Siamese Department of Fisheries and the United States 

 National Museum. 



PANGASIUS CULTRATUS, new species 



Description. — Elongate, body greatly compressed and deep, ventral 

 profile much more arched than dorsal, dorsal profile from snout to 

 dorsal fin slightly elevated and nearly straight ; abdomen compressed 

 to a sharp edge along entire median line; depth of body at anal 

 origin 3.6 in standard length, the thickness 3.25 in depth, least depth 

 of peduncle about equal to postorbital part of head ; head short, 5 in 

 body length, moderately compressed, its greatest width 1.5 in length 

 and about equal to its depth; snout short, blunt, broadly rounded, 

 slightly less than eye ; eye large, 3.5 in head, rather more than 2 in 

 the strongly convex superior interorbital space and less than 2 in the 

 inferior interorbital space ; eye scarcely visible from above, its middle 

 behind corner of mouth, its anterior margin separted from mouth 

 by a space equal to 0.5 eye; mouth subterminal, crescentic, its width 

 1.5 times eye; teeth in jaws in a narrow band, on vomer in well-sepa- 

 rated horizontally ovate patches, on palatines in smaller oblique 

 patches which form a crescent with those on vomer; maxillary bar- 

 bels, attached behind corner of mouth, occupy a deep groove, extend 

 slightly behind eye, and are much less than 0.5 head; mandibulary 

 barbels less than 0.5 maxillary barbels; skin of head minutely gran- 

 ular, no obvious median fontanel ; occipital process long and slender. 



Fins : Dorsal formula ii,6, the spine equal to head minus snout, 

 slender, laterally compressed, finely serrated on posterior edge, 

 longest soft rays 2.5 times length of dorsal base; adipose fin small, 

 slender, less than diameter of eye, its insertion over last fifth of 

 anal fin; caudal broad, forked, somewhat longer than head, the 

 lobes obtusely pointed; anal rays iv,39, the long base of fin con- 



