BY "W. MACLEAY, F.L.S. 317 



1003. Monacantutjs Fbeycineti, Hollard. 



Ann. des Sc. Nat. 1854, Vol. II., p. 336, pi. 12, fig. 3. 



D. 36. A. 35. P. 13. 



The profile of the head and snout is almost straight, and at an 

 angle of 40°, or more ; the muzzle is very obtuse and the back 

 between the fins horizontal. The dorsal spine is very long, with 

 four rows of barbs and is a little flattened, the second ray or 

 spine attached to the first by a membrane, is much larger than 

 usual, and resembles a Balistes. The soft dorsal and anal fins 

 are considerably lower posteriorly than in front. The ventral 

 spine terminates in a prominent spinous plate, the abdominal 

 outline behind it extending some distance before the commence- 

 ment of the anal fin. On each side of the tail there are six or 

 seven strong spines placed in two rows, and pointing backwards. 

 The colour is uniform and of a darkish hue, in most preserved 

 specimens, but one shows traces of lines or streaks on the body, 

 the spines on the tail are generally black on the point, and the 

 portion of the tail on which they are situated is of a lightish hue. 



New South Wales. 



1004. MoNACANTnus platifrons, Hollard. 

 Ann. des Sc. Nat. 1854, Vol. II., p. 341. 



D. 33.? A. 31.? P. 12. 



Form thick and rather elongate, the profile of the head a little 

 convex, at an angle of 30°; the forehead is very broad and flat 

 between the eyes, and the muzzle is rounded. The dorsal spine 

 is straight and rather short, with four rows of barbs ; it is placed 

 above the hinder half of the eye which is very large. The 

 ventral spine is not prominent and has at its extremity a small 

 spinous plate. The soft dorsal and anal fins are wanting, or 

 much injured, in the only specimen known. The scales of the 

 body each bear from one to four straight slender spinules, 



