formed at Port Arthur: 
105 
Monacanthus rudis (Nob.)* Grey Mon acanthus. 
Mon. (nec paleari extensivo, nee cauda setosd , nec 
corpore papilloso vel penicelligero preedit us;) retro - 
scaler ; colorc (murino ?) immaculato ; rostro me - 
diocri ; dentibus latis in serie duplici dispositis , decern 
superioribus sex inferiorities ; aculeo dorsali subulato y 
spinifero ; pinna caudee rotundata . 
Radii P. 14. D. 2 | 35 ; A. 34 ; C. 12. 
This Monacanthus , known at Port Arthur (as well as 
the Aleuteres described below) by the name of Leather 
Jacket, attains the length of a foot or more, and is con¬ 
sidered to be a good fish for the table, the skin being • 
removed before it is cooked. After long maceration in 
spirits it has a dull greyisli-brown hue, without any traces 
of spots or other configurations of colour; and the species 
also wants the extensible dewlap, the bristly tail, pe¬ 
dunculated warts or branching cirri, which characterize 
other groups of Monacanthi. 
Aleuteres maculosus (Nob.). Speckled Leather 
Jacket. Al. rctro-scaber, sub-ovalis , ventre promi - 
nulo; angulis quatuoi' eiculei dorsalis spiniferis ; 
pinna caudee rotundata , sub finem nigro fasciatd ; 
corpore colore murino ? nebuloso-guttato . 
Radii:- P. 11 aut 12; D. 2-34 ; A. 32; C. 12. 
This is a small Aleuteres , seldom exceeding five inches 
in length, and having a sub-oval form, the back being 
less arched than the belly. The dorsal and anal fins are 
arched, the curvature being more abrupt anteriorly. The 
dorsal spine is four-sided, with rows of prickles pointing 
downwards on each of the angles. The minute second 
spine is very slender. As has been remarked by Salvian, 
this small spine aids like a trigger in fixing the large one 
in any required position. The colour of the fish after 
being kept in spirits is dull olive-brown or mouse-colour, 
with scattered clusters of small dark spots. The sub¬ 
terminal black band on the caudal fin is very faint* 
