with caudal. Length of lower jaw beyond extremity of upper 

 jaw 3.4 3.6 in length, about 4 in length with caudal. Eye 

 1.5 1.9 in postorbital part of head, a little more than once - 

 1.5 in interorbital space. Triangular part of upper jaw some- 

 what broader than long, scaly above. Praeorbital much higher 

 than long and much shorter than eye. Teeth conical, curved 

 backwards, in bands of about 4 rows in each jaw. Origin of 

 anal below 4 th dorsal ray. Base of anal 2.5 3 in length of 

 dorsal. Dorsal rounded, none of the rays prolonged, the fourth 

 sometimes somewhat thickened. In males the 6 th and /th rays 

 of anal are somewhat enlarged and thickened, but not so much as 

 to reach to the base of the caudal. Pectorals about equal to 

 head without snout. Ventrals half as long as pectorals, about 

 twice nearer to caudal than to frontborder of eye. Caudal 

 obtusely rounded. Colour of preserved specimens brownish 

 with a distinct silvery lateral band, bordered above by a faint 

 black line. A black line runs along the middle of upper side 

 of the lower jaw and is continued backwards to between the 

 eyes, forming a median longitudinal stripe on the triangular 

 part of the upper jaw. Distal part of dorsal and often also of 

 anal black. Caudal more or less dusky. Length 230 mm. 



Habitat: Singapore; Sumatra (Benkulen, Priaman, Deli); 

 Banka ; Nias ! ; Simalur ! ; Java (Batavia !, Semarang !, Surabaya !) ; 

 Java Sea!; Borneo (Banjermassin, Stagen !, Balikpapan !, San- 

 dakan, Baram); Flores!; Celebes (Makassar!, Maros!, mputh 

 of river Tello!, Menado); Batjan ; Ceram; Ambon!; Goram ; 

 Aru Islands ; Waigeu ! ; New Guinea (Segaar Bay, Ramu). 

 Philippines, Malay Peninsula, Bay of Bengal, Andamans, Bombay. 



In sea, estuaries and rivers. 



6. Arrhamphus Giinther. 



(GiJNTHER, Cat. Brit. Mus. VI. 1866, p. 276). 



Elongate, compressed. Mandibles somewhat projecting beyond 

 the upper jaw, but not prolonged into a long beak. Inter- 

 maxillaries forming a triangular plate, which has a band of 

 teeth, similar to that of the lower jaw. Teeth in narrow or 

 broader bands in both jaws, minute or moderate and often 

 tricuspid. Origin of dorsal far backwards. Origin of anal opposite 

 to that of dorsal or somewhat more backwards. Pectorals 

 inserted high up, not as long as head. Ventrals nearer to head 



