I2 3 



than postorbital part of head. Ventrals midway between front- 

 margin of eye and the caudal. The middle and hinder dorsal 

 and anal rays subequal in length, short, the last terminating 

 at a considerable distance from the root of the caudal. Origin 

 of dorsal distinctly behind that of anal. Caudal fin rounded. 

 A silvery lateral band, inconspicuous before dorsal. Dorsal and 

 anal with a series of diffuse spots in the middle, forming a 

 longitudinal band. Pectorals with a large dark patch at their 

 base, especially conspicuous at the innerside of the fin. Length 

 of the only specimen described 420 mm. [Type in the British 

 Museum seen by us]. 



Habitat: Nias ! ; Celebes (Menado); Sangir Islands. 



In sea. 



3. Tylosurus kreffti (Gthr.) 



Bclonc krefftii Giinther, Cat. Brit. Mus. VI. 1866, p. 250. 



Stenocaulus krefftii Ogilby, Proc. Roy. Soc. Queensland XXI. 1908, p. 91. 



Tylosurus krefftii Me Culloch, Check-list of fish of N. S. Wales, Prt. II. 1919, p. 29. 



D. 2.14 2.l6; A. 2.17 2.19; P. 1. 10; V. 1.5 ; L. 1. I/O IQO. 



Strongly compressed, the breadth of the body i 2 / 3 times 

 in its height. Height 10 15, n 17 in length with caudal. 

 Head 2.3 2.4, 2.6 in length with caudal. Eye 2.6 3.8 in 

 postorbital part of head, about equal to interorbital space and 

 7.2 8.5 in snout. Height of mandible below pupil a little more 

 than half of the greatest diameter of eye. Head flat above, 

 with a shallow median groove. Supraorbital region with a few 

 striae. Maxillaries half hidden by praeorbital. Operculum as 

 well as the greater part of upper surface of head, including the 

 median groove, scaly. Canines slender, straight. Length of 

 pectorals much less than postorbital part of head, slightly 

 more than height of body. Origin of ventrals midway between 

 base of caudal and hindmargin of praeoperculum. Middle 

 and hindermost anal and dorsal rays subequal, much shorter 

 than anterior rays. First dorsal ray above second divided ray 

 of anal. Lateral line without keel on caudal peduncle. Caudal 

 truncate. Colour in alcohol brownish above, yellowish and 

 slightly silvery below, with an indistinct lateral silvery band 

 in the postanal part of the body. Fins dusky. Length 650 mm. 



Habitat: New Guinea (Lorentz-river !, Mimika river). - 

 Queensland. 



In rivers. 



