60 
THEBAPO’S' EICHAEDSONI. 
(Murray Silver Pereh.) 
D. 12/11-12. A. C. 17. P. 16. L. 1. about 65. 
L. lat. 17/25. 
Height of the body three times and eight-tenths in the total length 
(to the central end of the caudal) ; head four and two-thirds in the 
same length ; the eye four and one-seventh in the length of the 
head. The superior profile strongly convex, and rather equally 
arched ; the inferior almost straight ; general form elongate ; no 
teeth to the palate ; praeorhital very strongly serrated ; the prseo- 
perculum rounded, and armed with a series of long spines pos- 
teriorly, and of shorter ones below. The caracoid is strongly 
serrated at its posterior margin ; the operculum has two spines, 
the lowest being the strongest. The upper part of the head is 
naked, the rest scaly. The dorsal is received in a longitudinal 
cavity of the back ; its fifth spine is longer than the precedents ; 
the lateral line extends considerably on the base of the caudal, 
which is also covered with scales. The caudal is slightly emar- 
ginate ; the spines of the anal are very strong, particularly the 
second. 
This species seems very nearly allied to Therapon Pllipticus, 
Richardson (Batnia'); but the number of the scales given by Dr. 
Glunther seem very different. (L. lat. 85. L. trans. 17/31.) 
Richardson’s figure shows only about 52, which might agree with 
our sort ; but he mentions nothing about them in his text 
(Erebus and Terror'). 
This fish is very often brought to Melbourne from the Murray. 
I have also a specimen from the neighborhood of Deniliquin ; 
but the lower point of its operculum is fiat and bifurcated ; this 
may be accidental. 
The general colour is of a greyish blue. The lower parts of 
the body are of a dirty white : the sides shaded with yellow ; 
each scale is bordered with black ; the head has a blueish 
tinge, with the lips and the lower parts of the head rosy ; eye 
yellow ; the first dorsal is dark, with the rays purple ; the second 
has its lower half of a dirty yellow, and its exterior one black ; 
