1418 Catalogue of Malayan Fishes. [Dec. 



From the mouth to the anus, 5| inch. 



Length of the tail, 33| 



Distance between the nostrils, Of 



„ » the eyes, \\ 



Breadth of the mouth, fc Of 



Distance from the snout to the eyes, 1^ 



Length of the anterior spine, If- 



„ of the second do., If 



Greatest breadth of the disk, 1 1 f 



Gen. Rhinoptera, (Kuhl) Muller und Henle, 1841. 



The snout deeply divided by a central incision. The cranial fins are 

 not on a level with the pectorals, but lower down, and are fixed at the 

 inferior margin of the root of the pectorals. The rays of the cranial 

 fins commence farther back than the termination of the pectorals. The 

 lower margin of the nasal valve is straight ; the external angle acute ; 

 on each side of their dorsal surface a longitudinal fold. The teeth 

 stand side by side in 3 to 5 rows of broad hexagonal plates which 

 laterally decrease in size. Outside appear several rows of smaller teeth, 

 which are not broader than long. They occupy the entire breadth of 

 the jaw. 



Rhinoptera adspersa, Valenciennes. 



Rhinoptera adspersa, Muller und Henle, 183. 



Pari daun of the Malays. 



(Young.) Above pale fawn-coloured ; beneath white. 



(Older.) Above chocolate brown or greenish olive ; beneath white. 

 Iris golden fawn-coloured ; pupil vertically elliptical. Teeth yellowish 

 white. 



Habit. — Sea of Pinang. 

 Indian Ocean. 



The teeth of both jaws are similar ; those of the centre-row are 

 hardly thrice as broad as long. The other rows gradually decrease 

 towards the sides of the mouth. There are nine rows in the upper 

 jaw, seven in the lower. The margin of the nasal valve is finely 

 denticulated, its length is 3£ times its height. The anterior margin 

 of the pectorals is slightly convex ; the posterior concave ; the angles 



