O. MOXACANTUUS. 24.'} 



each side with a series of ))iirb8, rough in front. Caudal rounded ; 

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

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

 Some undulated black intramarginal lines on the caudal tin. Dorsal 

 and anal fins dotted with blackish. 

 East-Indian archipelago. 



a. Three and a half inches long. From Ur. Bleekcr's Collection, as 



typical of M. melaHocepJi(dus. 

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



typical of .1/. janthinnsoma. 



19. Monacanthus spilosoma. 



Bennett, Beechey's Vmj. Fish. p. 70, pi. 22. tig. 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 depth 

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

 caudal). Snout pointed, with the upper 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 straight. Ventral spine well developed, 

 moveable, provided with barbs, free, the abdominal flap 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 five 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 lincolatod with blackish. 



Sandwich Islands. 



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



c. Ventral spine present, anc/ii/losed to the pelvic bone. 



2t). Monacanthus granulosus. 



?? Balistes papillosus, L. Si/st. Xat. p. 405 : Bl. Schn. p. 47o. 

 Balistes granulata, White', Journ. iV. S. Wales, p. 2Uo, pi. (p. 204) 



fig. 2. 

 Monacanthus granulatus, Richards. To;/. Ereb. ^- Terr. Fi.fh. p. G-"', 

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



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

 Body covered with papillaD. each with a round expansion at the 

 top, like a mushroom ; in dried examples tliey shriidv. assuming tlie 

 appearance of a short spine. ]5ody ratlier oblong, its depth being 

 nearly one-half of tlio total length (willniut caudal). Snout mode- 

 rately produced, witli the ujjper profile sliglitly concave. Dorsal 



If '> 



