242 MR. G. A. BOULENGER ON [Apr. 16, 
Mur2NIDz&. 
49. Mur#&NESOX CINEREUS, Forsk. 
50. OpHICHTHYS CIRRHOCHILUS, Blkr. 
51. OpHicHTHYS CANCRIVORUS, Rich. 
52. Mur2NA TESSELLATA, Rich. 
PLECTOGNATHI. 
ScLERODERMI. 
53. BALISTES ERYTHRODON, Gthr. 
54. MonAacANTHUS MONOCEROS, L. 
55. MoNACANTHUS MELANOPROCTES, sp.n. (Plate XXVIII.) 
D. 32-34. A. 32-34. 
Skin rough, villose ; no caudal spines. Depth of body twice and 
a half to twice and three fourths in the total length. Snout long, 
with straight or slightly concave upper profile. Pectoral fin below 
the posterior border of the eye. Dorsal spines above the centre of 
the eye, strong, as long as the distance between the nostril and the 
mouth ; armed behind with a double series of small barbs, pointing 
outwards and downwards, and in front with a double series of small 
tubercles. Soft dorsal and anal fins low. Caudal rounded. Ven- 
tral spine small, armed with spikes. Pale reddish brown; cheeks 
and sides of body lineolated with blackish, the lines oblique on the 
cheeks, and straight from the gill-opening to the caudal; a broad 
blackish band from the dorsal spine to below the anterior third of 
the soft dorsal fin, and two others on each side of the back, broader 
than the interspace between them; dorsal and anal fin uniform pale 
reddish ; vent in a blackish spot. 
Total length 8 inches. 
Several specimens. 
GyMNODONTES. 
56. TETRODON MARGARITATUS, Riipp. 
57. TeETRODON VALENTINI, Blkr. 
58. Diopon uysTrRIix, L. 
59. CHILOMYCTERUS ORBICULARIS, Bl. 
60. CHILOMYCTERUS ECHINATUS, Gron. 
CHONDROPTERYGII. 
CaRCHARIIDE. 
61. CARCHARIAS ACUTIDENS, Riipp. 
A male, measuring 8 feet 5 inches. 
