BY W. MACLEAY, F.L.S. 365 



139. Therapox NIGER, Casteln. 



Proc. Zool. Soc. Victoria, Vol. I., p. 59. 



D. 12/12. A. 3/8. 0. 17. P. 15. L. lat. 89. L. trans. 14/28. 



Height of the body three times and a-half in the length ; head 

 four times and two -thirds in the same ; eye four times and one- 

 third in the length of the head. Body convex above, less so 

 beneath ; praeorbital strongly denticulated ; praeoperculum a little 

 emarginate behind, and armed with strong spines, these spines 

 longest at the angle which is rounded and much smaller on the 

 lower limb. Operculum terminated by two bunches of flat spines, 

 the first of two, the second of six spines ; the superscapula and 

 coracoid are very strongly denticulated. The dorsal fin received 

 into a groove on the back, the spines strong ; the three first the 

 shortest ; the membranes of the soft dorsal scaly ; caudal fin 

 emarginate and scaly ; anal spines large and striated ; ventral 

 spine strong, striated and longer than half the length of the fin. 

 The back is grey, but appears dark on account of all the scales 

 having a rather broad, black margin ; beneath the colour is 

 yellowish- white ; fins grey ; the posterior part of the caudal black. 



From the Murray River ; rarely seen. Length sixteen inches. 



140. Therapon unicolor, Gunth. 



Gunth. Cat. Fishes I., p. 277. 



D. 12/10. A. 3/8. L. lat. 50. L. transv. 9/20. 



Height of body four times in the total length, the length of 

 the head four times and a-half ; the space beteen the eyes is 

 greater than their diameter, and the snout is still longer. Prae- 

 operculum rounded, finely serrated ; praeorbital and coracoid 

 indistinctly denticulated. Operculum with two spines, the lower 

 slightly pointed. Spines of the dorsal fin feeble, the sixth longest 

 and three times and three-quarters in the length of the head. 



