MCCULLOCH. 125 



361e. M. NITKNS. Silver Leather-jacket. Id. Hollard, Ann. Sci. Nat. 



(4) ii., 1854, p. 364. pi. 14, 4. 

 A diminutive species, less than 2 inches long, which is rarely stranded on 

 our ocean beaches. 



362. Chaetodermis Swainson, Nat. Hist. Fish. Amph. Rept. ii., 1839, p. 327 



(spinosissimus). 



362a. C. PENNiOXLLiGBRtrs. Prickly Leather-jacket. Monacanthus pent- 

 cilligerits Cuvier, Reg. Anim. 2nd. ed., ii., 1829, p. 374. C. penicilli- 

 gerus Bleeker, Atlas Ichth. v., 1869, p. 129. pi. 221, 3 (PI. xlii.). 



Though occurring in Queensland, the records of this species from New South 

 Wales need verification. 



363. Caxtherixes Swainson. Nat. Hist. Fish. Amph. Rept. ii., 1839, p. 327 



(nasutus). 

 A. Depth at origins of dorsal and anal fins less than half the length to the hypural 

 joint. 

 B. Pubic spine distinct; caudal peduncle shorter than the interdorsal space. 

 C. Depth at origin of dorsal and anal fins less than length of head. 



ay r audi (363a). 

 CC. Depth at origin of dorsal and anal fins greater than length of head. 

 D. Less than 30 anal rays; scales very coarse. granulatus (363b). 

 DD. More than 30 anal rays. 



E. Skin beset with minute equidistant spines. 



F. No brush of setae between dorsal and anal fins; D. 35-38, 

 A. 33-36. hippocrepis (363c). 



FF. A brush of setaa between dorsal and anal fins; D. 31-33, 

 A. 31-32. guntheri (363d). 



EE. Skin beset with spines which are not equidistant but in 

 groups of 2-5. 



G. Each scale with 3-5 strong spines, united at their bases; 



D. 36-39, A. 33-35. trachylepis (363e). 



GO. Each scale with 2-3 slender spines which are juxtaposed but 



not united; D. 33-35, A. 31-36. setosns (363f). 



BB. Pubic spine obsolete, length of caudal peduncle subequal to interdorsal 



space. 



H. A blue stripe from chin, through eye, to middle of side, and many 



blue spots. spilomelanurus (363g). 



HH. Greenish, with brown spots. maculosus (363h). 



AA. Depth at origins of dorsal and anal fins half or more than half of length to 



hypural joint; pubic spine small or obsolete. . inosaicus (363j). 



Cantherines convexirostris, castlenaui , prasinus, freycineti, and rudi's are 

 omitted from the above key, because certain of their structural details, necessary 

 for the determination of their affinities, are unknown to me. 



363a. C. AYRAUDi. Chinaman Leather-jacket. Batistes ayraudi Quoy & 

 Gaimard, Voy. Uranie, Zool., 1824, p. 216, pi. 47, 2. Pseudomonacari- 

 thus ayraudi Roughley, Fish. Austr., 1916, p. 188, pi. 66. 



The young are plentiful in inlets while adults are more commonly captured 

 in deeper water. Length 20 inches. 



363b. C. granulatus. Rough Leather-jacket. Batistes granulatus 

 Shaw, White's Voy. N.S. Wales, 1790, p. 295 & figure. Monacanthus 

 granulatus Richardson, Ichth. Erebus & Terror, 1846, p. 63, pi. 40, 1-2 

 (PL xlii.). 



Common in inlets along the coast. Length 9 inches. 



