5. MOXACA^THtrs. 21-') 



each side with a series of barbs, rough in front. Caudal rounded ; 

 dorsal and anal fins rather low. Ventral spine prominently move- 

 able, with spinelets. Brown, with a black spot on the gill-opening. 

 Some undulated black intramarginal lines on the caudal fin. Dorsal 

 and anal fins dotted with blackish. 

 East-Indian archipelago. 



a. Three and a half inches long. From Dr. Bleeker's Collection, as 



typical of M. melanocephalus. 



b. Three and a half inches long. From Dr. Bleeker's Collection, as 



typical of M. janthinosoma. 



19. Monacanthus spilosoma. 

 Bennett, Beechey's Voy. Fish. p. 70, pi. 22. fig. 1 . 

 D. 37. A. 33. 



Scales very small ; surface rough, the edge of each scale being 

 raised and provided with a few spines. Body oblong, its deptli 

 being contained twice and two-thirds in the total length (without 

 caudal). Snout pointed, with the iipper profile slightly concave. 

 Dorsal spine strong, straight, nearly as long as the head, armed with 

 a double series of barbs behind, situated above the posterior part of 

 the orbit. Caudal rounded ; dorsal and anal fins of moderate height, 

 with the outer margin nearly ^traight. Ventral spine well developed, 

 moveable, provided with barbs, free, the abdominal fiap being but 

 little developed. Gill-opening below the posterior part of the orbit. 

 Light brownish (in a dried state), with numerous rounded brown 

 spots of the size of the pupil of the eye, arranged in irregular longi- 

 tudinal series. Side of the head with four or fivr black lines running 

 in an oblique direction from the upper profile of the snout towards 

 the branchial and subbranchial region. Caudal fin with brown dots 

 and with a black margin, which, again, has a whitish edge. Dorsal 

 and anal fins lineolated with blackish. 



Sandwich Islands. 



a. Skin, 4 inches long. Purchased of Mr. Damon. 



c. Ventral spine jn-esent, anchyloscd to tlie j^elvir'hone. 



20. Monacanthus granulosus. 



?? Balistes papillosus, L. Syst. Nat. p. 400 ; Bl. Sehn. p. 47o. 

 Balistes granulata, White, Joun). N. 8. Wales, p. 2! If), pi. (p. 2.'>4) 



Monacanthus granulatus, Richards. Voi/. Ereb. cS' Terr, Fish, p G"}. 

 pi. 40. figs. 1 & 2 (not good) 



D. 30. A. 28-29. Vert. 7/11. 



Body covered with papilla?, each with a round expansion nt the 

 top, like a mushroom ; in dried examples they shrink, assuming tlio 

 appearance of a short spine. Body rather oblong, its dc]»th being 

 nearly one-half of the total length (without candnl). Snout niodc- 

 ratelj- produced, with the u])i)er ])i'()lilv slightly foncivc. Doi-sal 



If .V 



