ABT. 7 



NEW SIAMESE FISHES SMITH 



29 



The fish at Lopburi shares with related forms the name pla 

 sawai. The collection contains only the type specimen. 



This species is named for Mr. Henry W. Fowler, of the Academy 

 of Natural Sciences of Philadelphia, as a small tribute to his 

 indefatigable studies of oriental fishes. 



FiGUKE 13. — Pangasius sanitwongsei 



PANGASIUS SANITWONGSEI, new species 



Description. — Elongate, body moderately compressed, head broad 

 and depressed; dorso-rostral profile nearly straight and gently in- 

 clined; depth 3.75 in length to base of caudal; head 4.3 in length; 

 eye placed low on side of head, 

 small, more than 7 in head, 3 in 



snout; maxillary teeth in a wide, ...\'^^>*"' ....•!• "'^^i 



continuous curved band, vomero- 

 palatine teeth united into a single 

 broad strongly arched band with 

 the outer part nearly at right angles 

 to the central vomerine mass and 

 tapering backward into sharp 

 points; barbels slender and rather 

 short, the maxillary 2.5 times diam- 

 eter of eye, the mandibulary shorter ; least depth of caudal peduncle 

 0.5 its length and contained 2.75 times in length of head. 



Fins : Origin of dorsal fin about midway between tip of snout and 

 adipose fin; dorsal rays ii,7; second simple dorsal ray greatly pro- 

 longed and filamentous, 0.5 combined length of head and body, the 



Figure 14. — Maxillary and vomero- 

 palatine teeth of pangasius sani- 

 twongsei 



