1849.] Catalogue of Malayan Fishes, 1015 



proceeding to the posterior margin of the lower lobe. The filament 

 nearest the pectoral is a little longer than the rest, its length nearly- 

 equalling that of the head ; the other five are nearly equal. A solitary- 

 individual occurred at Pinang in 1843. As observed by M. M. Cuvier 

 and Valenciennes, the airvessel is excessively small, pointed at both 

 extremities, of the shape and size of a grain of oats. 



Polynemus hexanemus, Cuv. and Val. 



Polynemus hexanemus, Cuv. and Val. III. 389. 



Polynemus hexanemus, Bleeker : Verh. Batav. Gen. XXII. 25, 59. 



Head above and back yellowish green, abdomen pale silvery ; fin- 

 membranes pale yellow minutely dotted with black, particularly the 

 pectoral fins which have a black appearance ; filaments white. Iris 

 silvery, dotted with black towards the upper orbital margin. 



D 8—1/12, C 17|, A 3/11, V 1/5, P 13, Filaments 6, Br. VII. 



Habit. — Sea of Pinang. 



Batavia, Samarang, Pasuruan. 



Total length : 4 inch. 



The length of the head is J of the total, measured from the muzzle 

 to the centre of the posterior caudal margin. The orbit is oval, 

 situated as in P. sextarius : its greatest diameter is contained 3J times 

 in the length of the head, in consequence of which the eye appears 

 comparatively smaller than in the preceding species. The ascending 

 margin of the preopercle is finely toothed, the lowest tooth being 

 stronger than the rest. The first dorsal spine is minute and almost 

 hid by the scales. The length of the third and fourth dorsal spines, 

 the longest, are but about -| of the greatest vertical diameter of the 

 body. The length of the second dorsal spine is a little less than the 

 extent of the base of the anterior dorsal fin. In height the fin itself 

 is somewhat less than the posterior, the reverse of which is the case 

 in P. sextarius. At the root of the caudal fin the hitherto straight 

 lateral line deviates a little downwards, and then again continues straight 

 towards the centre of the margin. The scales of the body have a 

 short raised line in the centre, producing series of continued lines 

 parallel to the lateral. The second, third and fourth filaments from 

 the pectoral fin, are the largest, greatly exceeding the length of the 

 head, almost extending to the anal fin ; the rest are nearly equal, some- 

 what shorter. From the description of M. M. Cuvier and Valenciennes, 



6 p 



