1860.] Report on some Fislies received from Sitang Eiver. 155 



blackish colour, with three longitudinal yellow lines, one along the 

 entire ridge of the baek from occiput to base of tail, the others along 

 each lateral line. Dorsal spine two-thirds of the length of the firsfc 

 soft ray. Lobes of the furcate tail subequal, the lovver rather^the 

 larger and longer. 



D. 1-7.— A. 12.— P. 11.— V. 6.—G 15. 



The chief structural difference from Gl. striatüs consists in its 

 having three more rays to the anal fin. Length 5^ in. Tenasserim. 



The fourth type is very distinct in the form of the mouth, and has 

 remarkably small gill-openings which are visible only from above. 

 I term it 



Exostoma, nobis, n. g. Othervvise generally similar to Glypto- 

 thorax, but with no pectoral disk, the dorsal spine exceedingly 

 slender (if always present ?), and the eyes somewhat larger. " Lips 

 refleeted and spread continuously round the mouth, so as to form a 

 broad flat sucker." Two distinct lateral lobes of minute card-like 

 teeth, both above and below, refleeted much apart, and having an 

 obviously suctorial centre. Only one pair of lovver cirri, sitúate at 

 the posterior corners of the refleeted lovver or hinder lip : the entire 

 lower-parts smooth and flat. Anal fin small ; the adipose dorsal 

 lengthened but very slight and low, extending nearly to the caudal. 



Ex. Berdmorei, nobis, n. s. Maxillary cirri reaching beyond the 

 base of the pectoral spines, and no distinct spinelet at the base of the 

 latter ; but a spinous base to the first ray of the ventrals : lovver caudal 

 lobe much broader and longer than the upper. 



D. 7.— A. Q.—P. 1-10.— V. 1-5.— G. 14. 



Colour dingy olive-brown, with obscure broad dark bands, present- 

 ing more or less of a clouded appearance ; the fins mostly darker : 

 below palé. Largest specimen á in. Tenasserim. 



Ex labiatum ; Glyptostemon lábiatus, McClelland. Dorsal de- 

 scribed to be " perfectly soft and free from spines and bristling points • 

 cirri very short." No notice of the colouring. From the Mishmi 

 bilis, E. Asám. 



Dr. Bleeker refers the (Pimelodus) nangra, B. H., to Glyptos- 

 ternon ; but fchis I cannot understand. Vide Hamilton's published 

 figures. He also gives a Gl. platypogon, (K. et v. H.), from Java 



