FISHKS — WAri'K. 93 



MonacantliJis setosits is most nearly allied to M. trachylepia, 

 ((iiiilli.,* with which T at first identified it. From tliis species it 

 dilfers by ha\'ing' a deeper body, mor(> obtuse snout and larger eye, 

 l)y tiie more backward position of the dorsal spine and antei'ioi' 

 situation of the gill slit and pectoral lin. The posterior half of 

 the body narrows more obtusely to tlie caudal pedicel, whicli is 

 markedly lower", shorter and without spines. In colour it may 

 be distinguished b}' the absence of blue spots at the base of tlie 

 fins characteristic of M. trachylepis. 



It is also allied to M. 7-udist, Rich.,! and Af. convexirosirin, 

 Giinth.,! but it differs from these species more than it does from 

 M. trachylepis. 



The single specimen from which the description and figure is 

 made, was obtained off Wollongong in 63-75 fathoms, and is there- 

 fore probably an inhabitant of deep water. 



MONACANTHUS MOSAICUS, Eammij & Ogilhij. 



(Plate xvii., fig. 1.) 



Monacanthus mosaiciis, Rams. &, Ogil., Proc. Linn. Soc. N.S.W,, 

 xi., 188G, p. 5. 



Station 39. 



A single example of this rare species was taken by the traw4 

 in 50 fathoms off Wata Mooli, south of Port Jackson. The species 

 was originally described from two specimens measuring four and 

 two-thirds and four inches respectively, obtained off Shark Reef 

 within Port Jackson, in January, 1886. In December of the 

 same year a third was taken in the Parramatta River, which is 

 still smaller. The fourth known example we now chronicle, shows 

 that the species is by no means a small one ; it measures 255 mm. 

 or ten inches in length. The following is a descriiDtion of the 

 specimen : — 



D. 36. A. 34. P. 13. C. 12. 



Length of head 3 '33, height of body 1"6, length of caudal 3-6, 

 in the total. The eye is one-fourth the length of the head and 

 equal to the interorbital space ; it lies midway between the end 



* Giinther— Cat. Fish. Brit. Mus., viii., 1870, p. 248. 



t Richardson —Voy. Ereb. & Terr,, Fish., 1846, p. 65, pi. xl., figs. 7-8. 



X Giiuther — loc. cit, 



