NEW SIAMESE FISHES SMITH 



21 



eastward into the Gulf of Siam through the town of Nakon Srita- 

 marat, Peninsular Siam. Cat. No. 90302, U.S.N.M. 



Remarks. — This genus has heretofore been known from a single 

 species, E. kalofterus (Bleeker), found in rivers in Sumatra and 

 Borneo where Bleeker reported it to be not rare. It is characterized, 

 among other features, by having two pairs of barbels whose length 

 is about equal to diameter of eye, and by having on the dorsal and 

 anal fins a broad black band, and on the ventrals a large black area 

 which may involve the entire fin. Its maximum length is 16 cm. 



The Siamese fish presents such differences from the East Indian 

 form that it seems best to describe it and give it a name. The two 

 are similar in general shape, in squamation, in fin formulae, and in 

 having a broad dark band extending from the snout to the tip of the 

 middle caudal rays; but the Siamese form has no vestige of maxillary 



Figure 9. — Epalzeorhynchus siamensis 



barbels, there are fewer scales in transverse series, and the dorsal, 

 anal, and ventral fins have no black whatever. 



The absence of maxillary barbels requires a modification of the 

 definition of this genus. 



Although only a single specimen was obtained in the upper waters 

 of Tadi Stream, the fish is apparently known to thfe fishermen, who 

 report that it reaches no larger size than the type and is good to eat. 

 A name borne by no other fish is applied to it, pla lab Tnue nang 

 (lady's finger-nai] fish). 



SCAPHOGNATHUS, new genus 



Body deep, strongly compressed, abdomen rounded; snout partly 

 covering upper lip and with a small lateral groove; mouth small, 

 terminal, the lif)s continuous around corners of mouth; lower lip 

 confined to the sides, the median portion of the lower jaw being a 

 slender, sharp-edged, scoop-like process overhung by the upper lip 



