6 peecid^:. 



Caudalis rounded. Denticulation of the prseoperculum stronger at the angle. Sub- 

 and interoperculum entire. The height of the body is contained thrice and three-fourths, 

 and the length of the head thrice and one-fourth in the total length. The diameter 

 of the eye is one-seventh of the length of the head. The pectorals do not reach the vent. 



Colour light brown, marbled and spotted with darker. There are also a number of 

 large irregular blackish-brown spots arranged as five or six interrupted cross bands, the 

 last of which crosses the tail behind the dorsal. The snout has a reddish tinge. The 

 fins are marbled and spotted with blackish brown, the interstices having a reddish 

 tinge toward the margin. 



Zanzibar. Bed Sea. Mozambique. Hojje Island, N .E. coast of Australia. 



14. Sen-anus dispar, sp. n. Plate I. figs. 2, 3. [423, 389.] 



D. " A. I- L. lat. c. 80. 



14-lu 8 



Diagnosis. — Caudalis rounded. The height of the body is contained four times, and 

 the length of the head thrice and two-thirds in the total length. The diameter of the 

 eye is contained five times and a half in the length of the head. The upper maxillary 

 bone reaches to the vertical from the posterior margin of the orbit. Upper limb of 

 the praeoperculum rather strongly serrated, with a few stronger denticulations at the 

 angle. Sub- and interoperculum entire. The third, fourth, and fifth spines of the 

 dorsal are the longest, and about one-third the length of the head. Pectorals longer than 

 the ventrals. 



The two varieties described below differ greatly in coloration; but they have one 

 common feature in the series of large round spots, about the size of the orbit, which 

 runs along the back. 



Description. — The form is oblong, rather elongated : the greatest height is above the 

 ventrals ; it is one-fourth of the total length, and nearly half the length of the dorsal 

 fin. The length of the head is contained three times and two-thirds in the total length. 

 The distance between the eyes is about equal to their diameter, which is contained five 

 times and a half in the length of the head. The length of the snout is about once and 

 a half the diameter of the eye. 



The cleft of the mouth is moderately oblique, the upper maxillary bone reaching the 

 vertical from the posterior margin of the orbit. The upper limb of the preeoperculum is 

 rather strongly serrated, with a few stronger denticulations at the angle ; the lower limb 

 is scarcely, and the sub- and interoperculum not serrated. The operculum terminates in 

 three spines: the two upper are conspicuous, flat, short, and triangular; the third is 

 hidden in the scales. The lower margin of the upper and the upper margin of the 

 second spine form nearly a right angle. 



The lower two-thirds of the dorsal are covered with minute scales. The spinous por- 



