242 MR. G. A. BOULENGER ON [Apr. 16, 



MuRjENIDiE. 



49. MuR^NEsox ciNEREUs, Forsk. 



50. Ophichthys cirrhochilus, Blkr. 



51. Ophichthys cancrivorus, Rich. 



52. MUR^ENA TESSELLATA, Ricll. 



PLECTOGNATHI. 



SCLERODERMI. 



53. Balistes erythrodon, Gthr. 



54. MONACANTHUS MONOCEROS, L. 



55. MoNACANTHUS MELANOPROCTES, Sp. 11. (Plate XXVIII.) 



D. 32-34. A. 32-34. 



Skin rouiih, 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, Riijip. 



57. Tetrodon valentini, Blkr. 



58. DioDON hystrix, L. 



59. Chilomycterus orbicularis, B1. 



60. Chilomycterus echinatus, Gron. 



CHONDROPTERYGII. 



Carchariid^. 



61. Carcharias acutidens, Riipp. 

 A male, measuring 8 feet 5 inches. 



